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Brief Report

First Report of Colletotrichum fructicola Causing Fruit Rot and Leaf-Tip Dieback on Pineapple in Northern Thailand

by
Alireza Armand
1,2,
Kevin David Hyde
1,2,3 and
Ruvishika Shehali Jayawardena
1,2,*
1
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
2
School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
3
Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
*
Author to whom correspondence should be addressed.
Plants 2023, 12(4), 971; https://doi.org/10.3390/plants12040971
Submission received: 20 December 2022 / Revised: 9 February 2023 / Accepted: 13 February 2023 / Published: 20 February 2023
(This article belongs to the Special Issue The Research of Plant Fungal Disease)
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Abstract

:
Pineapple is one of the most economically important fruits in tropical countries, particularly in Thailand. Canned pineapple is currently Thailand’s main exported commodity to many countries, including the United States, Russia, Germany, Poland, and Japan. Fungal diseases are considered a permanent threat to fruits in the pre- and post-harvest stages, leading to considerable economic losses. Fungal disease is one of the primary causes of massive yield losses in pineapples around the world. Colletotrichum species are the most common fungal pathogens affecting different tropical fruits. Although there are many reports regarding Colletotrichum species associated with pineapple, they do not have molecular data to confirm species identification. However, the occurrence of Colletotrichum species on pineapple has not been reported in Thailand so far. In this study, we isolated and identified Colletotrichum fructicola on pineapple in northern Thailand and have proven its pathogenicity to the host. This is the first report of the occurrence of Colletotrichum in pineapple, based on morpho-molecular approaches.

1. Introduction

Pineapple (Ananas comosus (L.) Merr.) is one of the edible and nutritious fruits of the Bromeliaceae, grown in tropical and subtropical countries [1]. Asia, South Central America, and Africa are the world’s leading areas producing this fruit [2]. Pineapple is the second largest tropical crop in the world [2] and the third most consumed fruit worldwide [3]. Brazil, China, Costa Rica, India, the Philippines, and Thailand are the top pineapple-producing countries [1]. Pineapple could be eaten as a fresh fruit or selected as a basic raw ingredient used in the confectionery industry [4,5,6]. The fruit contains immense nutrients and is abundant in vitamins A, C, B1, and B6 [7,8,9]. It also has proteins, carbohydrates, fiber, copper, manganese, and several minerals [5,10].
In Thailand, pineapple products have been regarded as economic commodities for export [11]. Thailand is currently the second-largest supplier of processed pineapple fruit in the world. Production areas for pineapple in Thailand have been divided into northern, northeastern, central, and southern parts [12]. Most cultivated areas are in Prachuap Khiri Khan, Rayong, Ratchaburi, and Chonburi provinces [11]. Pineapple is classified into five groups based on the morphology of the leaf and fruit, namely Abacaxi, Cayenne, Maipure or Perolera, Queen, and Spanish [13]. Among these, Cayenne, Queen, and Spanish are cultivated in Thailand [14]. Nang Lae district in Chiang Rai province is the most pineapple-cultivating area, and Nang Lae (Cayenne group) and Phu Lae (Queen group) are the most common varieties in northern Thailand (http://www.doa.go.th/; https://www.saio.co.th/; accessed on 12 December 2022). The pineapple-growing area in Thailand is around 72,656 hectares, with an annual production of 1,680,884 metric tons. The total canned pineapples exported from Thailand were 290,524 metric tons in 2020, valued at about 345 million US dollars [15].
Diseases are the key elements of significant yield losses in pineapples across the world [1]. Among fungal pathogens, Colletotrichum species are the most important fungi responsible for the diseases of tropical and sub-tropical fruits [16]. Many Colletotrichum species have been reported from different hosts in Thailand such as C. aenigma [17], C. aeschynomenes [18], C. artocarpicola [19], C. asianum [20,21,22,23], C. boninense [18,24], C. brevisporum [16,25,26,27], C. chiangraiense [24,28], C. cordylinicola [21,29,30], C. endophytica [31,32,33,34], C. orchidearum [24,25], C. orchidophilum [24], C. plurivorum [35], and C. siamense [16,21,24,36,37], majority belonging to gloeosporioides species complex. Colletotrichum fructicola is one of the most invasive species and has been reported as the causal agent of anthracnose, leaf spots and bitter rots in more than 90 plant species [38]. It was originally isolated from Coffea arabica in northern Thailand [39]. It has also been reported from Capsicum annuum [24], Carica papaya [20,24], Cymbopogon citratus [16,24], Dendrobium sp. [24], Dimocarpus longan [20,24,29], Freycinetia sp. [24], Pandanus sp. [24], Pennisetum purpureum [16,24] in Thailand. Mealybug wilt-associated virus, bacterial heart rot, fruit collapse, butt rot, fruitlet core rot, black rot, yeasty, and fusariosis are the main diseases of pineapple, discussed by Sapak et al., (2021). Despite the importance of pineapple in Thailand, studies for the isolation and identification of fungal pathogens associated with pineapple have not been conducted in Thailand.

2. Results

2.1. Morphological Studies

Following 7–14 days of incubation, morphological features including culture (color and growth rate) and microscopic features (conidiogenous cells and conidial measurements, appressoria measurements) were recorded for P76 (MFLU 22-0302) and P76-3 (MFLU 22-0303). The two strains, P76 and P76-3 were isolated from rotting pineapple fruit and leaf dieback, respectively. Morphological comparisons of P76 and P76-3 were performed on 14-day-old cultures grown on PDA at 25 °C ± 2 °C. There were minor differences in size of conidia and conidiogenous cells and also in appressoria shape which are very common in a specific species within the C. gloeosporioides species complex. Finally, these two isolates were identified as C. fructicola based on morpho-molecular evidence.

2.2. Phylogenetic Analyses

The five-locus (ITS, ACT, GAPDH, CHS-1, and TUB2) phylogenetic analysis included 73 reference isolates [40,41,42]. The phylogenetic tree consisted of 71 ingroup and 2 outgroup taxa (Colletotrichum truncatum, CBS 151.35 and C. acidae, MFLUCC 17-2659). The data matrix contained a total of 1670 characters, of which 269 were parsimony-uninformative and 384 were parsimony-informative. The most parsimonious tree (Tree Length (TL) = 1321, Consistency Index (CI) = 0.673, Retention Index (RI) = 0.824, Rescaled Consistency Index (RC) = 0.554, Homoplasy Index (HI) = 0.327) was presented (Figure 1). The ML, MP and BYPP trees were identical in topology. The best-scoring RAxML tree with final optimization showed a likelihood value of −9834.854352. The dataset comprised 754 distinct alignment patterns, with 5.31% of characters being gaps or undetermined. Estimated base frequencies were as follows: A = 0.229261, C = 0.299900, G = 0.241493, T = 0.229347, with substitution rates AC = 1.133302, AG = 2.907494, AT = 1.290422, CG = 0.902726, CT = 4.957643, GT = 1.000000. The gamma distribution shape parameter is 0.422238 and the tree length is 0.963648. Based on the phylogenetic analysis, strains P76 and P76-3 clustered with C. fructicola, showing 86/77/0.99 ML, MP, and BYPP values, respectively (Figure 1). The base pair differences between these two strains and the ex-type of C. fructicola (ICMP 18581) were shown (Table 1).

2.3. Taxonomy

Colletotrichum fructicola Prihast., L. Cai & K.D. Hyde (2009) (Figure 2 and Figure 3).
Index fungorum number: IF 515409; Faces of Fungi number: FoF 06767.
Associated with pineapple fruit rot and leaf dieback. Sexual morph: Not observed. Asexual morph: Vegetative hyphae hyaline, smooth-walled, septate, branched. Conidiomata acervular, dark brown, bearing conidial mass, and setae. Setae brown to dark brown, smooth-walled, 2–4 septate, 38–83 μm long ( x ¯ = 59.5 μm, n = 6), base cylindrical, 3–5 μm diam. ( x ¯ = 4.5 µm, n = 6), tip acute or obtuse. Conidiophores rarely observed, hyaline, septate, branched, cylindrical to inflated. Conidiogenous cells hyaline, cylindrical or clavate, 12–25 × 3–4.5 μm ( x ¯ = 18 × 3.5 µm, n = 20). Conidia hyaline, aseptate, smooth-walled, cylindrical, rounded at apex, sub-acute at base, guttulate, 12.5–19 × 4.5–6 μm ( x ¯ = 16 × 5 µm, n = 30).
Culture characteristics: Colonies on PDA 65–85 mm in diam. after 7 days at 28 °C, velvety, circular, undulate; surface pale grey in center and white in margin, becoming grey with age; reverse same color. Colonies on OA 60–71 mm in diam. after 7 days, cottony, slightly raised, entire; surface white to whitish grey; reverse same color. Appressoria produced on slide culture, brown to dark brown, irregular in shape, undulate, 7–9 × 4.5–6 μm ( x ¯ = 7.8 × 5 µm, n = 15), producing on hyphae and conidia.
Material examined: Thailand, Chiang Rai Province, Mueang Chiang Rai District, Ban Du Sub-district. On pineapple rotting fruit, 27 June 2022, Alireza Armand, P76 (MFLU 22-0302), living culture, MFLUCC 22-0181. On pineapple leaf dieback, 27 June 2022, Alireza Armand, P76-3 (MFLU 22-0303), living culture, MFLUCC 22-0182.
Notes: The species within the gloeosporioides species complex are mainly distinguished by producing cylindrical conidia with rounded ends, tapering slightly towards the base [16]. The strain P76 was isolated directly from rotting pineapple, whereas P76-3 was obtained by tissue isolation from a fresh leaf with tip dieback symptoms. Based on the phylogenetic tree (Figure 1), isolates P76 (MFLUCC 22-0182) and P76-3 (MFLU 22-0303) clustered with C. fructicola strains with 86/77/0.99 ML, MP, and BYPP values, respectively. Morphologically, P76 and P76-3 are similar. However, P76 produced slightly larger conidia than P76-3 (13–19 × 4.5–6 μm in P76 vs. 12.5–17.5 × 4–6 μm in P76-3). The conidial shape was slightly different, as P76 produced conidia with obtuse ends, whereas P76-3 mostly produced conidia with rounded ends. However, morphological comparison with the ex-type of C. fructicola revealed no significant differences between the type strain and our isolates (P76, P76-3) [39].

2.4. Pathogenicity Assay

Pathogenicity test results related to strain P76 showed that this strain can cause disease on both wounded and non-wounded host leaves. The wounded leaves inoculated with P76 showed dieback symptoms 4 days after the inoculation, whereas those of the non-wounded leaves showed symptoms 6 days after the inoculation. However, the symptoms continued to spread in both wounded and non-wounded leaves after 10 days. After 11 days, aerial mycelia started to grow on the surface of the symptomatic area in both wounded and non-wounded leaves. (Figure 4, P76/W, P76/NW).
Six days after the inoculation, symptoms on the injured leaves treated with P76-3 were only present at the border of the mycelial plugs (Figure 4, P76-3/W). The non-wounded leaves inoculated with P76-3 remained asymptomatic during the test (Figure 4, P76-3/NW) along with the negative control treatments. The re-isolated fungi were identified as C. fructicola according to morphological characteristics.

3. Discussion

In this study, the diseased leaves showing dieback symptoms and rotting fruits of pineapple were collected in Chiang Rai province, northern Thailand. Based on a direct isolation from the fruiting bodies (Figure 2) and an indirect isolation of infected leaves via tissue culture (Figure 3), we obtained two Colletotrichum isolates. Jayawardena et al., (2021) recommended using a polyphasic approach to identify Colletotrichum species [43]. We used both morphological examination and multi-loci molecular analysis for species-level identification. The phylogenetic analysis of a combined dataset of ITS, ACT, CHS-1, GAPDH, and TUB2 showed that the two isolates of Colletotrichum associated with pineapple belong to C. fructicola (Figure 1). Morphological studies also confirmed the phylogenetic results. Colletotrichum species have a wide host range and geographical distribution worldwide [16,44]. However, the occurrence of Colletotrichum species on pineapple has not so far been reported in Thailand. In the USDA host fungal database, there are 12 records of Colletotrichum species on Ananas sp. [45]. Colletotrichum ananas was reported in India [46], while C. truncatum was reported to cause leaf-tip dieback in Malaysia [45]. Colletotrichum gloeosporioides has been recorded to cause anthracnose on pineapple in China and the United States [45]. Colletotrichum gloeosporioides was also recorded from Ananas spp. in Brazil on pineapple leaves. Colletotrichum sp. was identified in Cuba, India, Korea, Panama, and the West Indies [47]. However, these species were identified based only on morphology.
In recent decades, identification based on morphology has led to the misidentification of fungal pathogens [43]. In plant pathology, correct identification of fungal species is a fundamental step that links information concerning biology, host range, distribution, pathogenicity and food security [43,48], indicating the importance of species identification to barricade future afflictions provoked by these pathogens [49]. Moreover, emerging pathogens have also been increasing threats during the last decade [24]. Colletotrichum, being a complex genus, shares overlapping morphological characteristics among species. Colletotrichum fructicola belongs to the gloeosporioides species complex, which comprises fruit rots and post-harvest pathogens. Since this species complex is the most confusing within the Colletotrichum genus, morphological identification alone cannot be trusted to identify the species correctly. It follows that the use of a polyphasic approach in plant pathology is crucial for the precise identification and naming of fungi, which will advance the management and control of both recognized and newly emerging diseases. [43]. Furthermore, a polyphasic approach using molecular analysis is an effective tool to identify cryptic species and estimate species diversity [49].
Among Colletotrichum species in the gloeosporioides species complex, C. fructicola has a very broad host range, isolated from more than eight plant families as endophytes and plant pathogens [48]. It has been reported from America, Asia, Africa, Europe, and Oceania [38]. In this study, we isolated and illustrated C. fructicola as the first report of Colletotrichum species associated with pineapple in Thailand, based on molecular and morphological analyses. Furthermore, the pathogenicity tests proved that the isolates are pathogens to pineapple (Figure 4).
The results of the present study can be useful for pathologists in understanding the fungal pathogen diversity associated with pineapple, disease management and quarantine purposes. Many new Colletotrichum species have been introduced in 2022 (https://www.mycobank.org/; accessed on 8 December 2022), and there are potentially many novel species of Colletotrichum that remained undiscovered [49]. Additionally, many studies reported new hosts for existing Colletotrichum species [50,51,52,53,54,55,56,57,58], broadening their host and geographical ranges. Therefore, more investigations on the isolation and identification of Colletotrichum associated with pineapple can improve our knowledge about fungal diversity and host range and will potentially lead to the discovery of novel species of Colletotrichum.

4. Materials and Methods

4.1. Sample Collection, Examination and Isolation

In order to isolate the fungal pathogens associated with pineapple plants, pineapple leaves with diebacks and leaf spots, and rotting fruits were considered. In total, 10 symptomatic leaves and 12 rotting pineapple fruits were collected during June–July 2022 from organic farms in Ban Du and Nang Lae sub-districts, Mueang Chiang Rai district, Chiang Rai province, northern Thailand. The samples were kept in plastic bags labelled with the collection date, collection site and host name before being transported to the laboratory for further examination. The fruiting bodies on natural substrates were observed and photographed using a stereomicroscope (OLYMPUS SZX16; Tokyo, Japan). Morphological features were observed using a LEICA-EZ4 stereomicroscope and photographed with an optical microscope equipped with a Nikon DS-Ri2 camera. The photo plates were made by the Adobe Photoshop v.21.1.2 software, and the scales were measured by the Tarosoft (R) Image Frame Work software.
Direct isolation and indirect isolation (tissue isolation) were used to obtain cultures [59]. Further, 30 mm2 leaf fragments were cut from the margins of lesions for tissue isolation, and were sterilized by submerging in 70% ethanol for 2 min, 10% sodium hypochlorite solution for 60 s, followed by three times rinsing in sterile distilled water for 60 s [32]. Following the procedures outlined by Senanayake et al., (2020), single-spore isolation and hyphal tip isolation were done to purify the isolates. Finally, the pure cultures were deposited in the Mae Fah Luang University Culture Collection (MFLUCC), Chiang Rai, Thailand. Specimens were deposited in the herbarium of the Center of Excellence in Fungal Research (CEFR), Mae Fah Luang University (MFLU).

4.2. DNA Extraction and PCR Amplification

Using a DNA Extraction Kit (Omega Biotek) in accordance with the manufacturer’s instructions, genomic DNA was extracted from fresh mycelia cultured on potato dextrose agar (PDA) for 14 days. The internal transcribed spacer (ITS), actin (ACT), chitin synthase (CHS-1), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and β-tubulin (TUB2) were amplified using primers ITS5/ITS4, ACT-512F/ACT-783R, CHS-79F/CHS-345R, GDF/GDR, and BT-2Fd/BT-4Rd, respectively (Table 2). The polymerase chain reaction was carried out in a total volume of 25 µL, including 12.5 µL of 2 × Power Taq PCR Master Mix, 1 µL of each primer (20 µM), 1 µL genomic DNA, and 9.5 µL of deionized water. The PCR procedure was done under the following conditions: Initial denaturation at 95 °C for 5 min, followed by 40 cycles of denaturation for 30 s at 95 °C; annealing at 53 °C for 60 s (ITS), 55 °C for 50 s (ACT), 58 °C for 30 s (CHS-1); 58 °C for 50 s (GAPDH), 58 °C for 90 s (TUB2); extension at 72 °C for 60 s; and the final extension at 72 °C for 10 min. PCR amplification was performed in an eppendorf thermal cycler (Master Cycler X50s). PCR products were sequenced by the SolGent company, Republic of Korea.

4.3. Phylogenetic Analyses

Sequences for the selected strains were obtained from GenBank (Table 3), according to blast-searching and related publications [40,41,42]. Multiple sequence alignments for ITS, ACT, CHS-1, GAPDH, and TUB2 were constructed using MAFFT v.7.11 on the web server (https://mafft.cbrc.jp/alignment/server, accessed on 12 February 2023) with the default settings [64]. BioEdit v.7.0.9.0 was used for adjusting the sequences [65] and TrimAl software was used to trim aligned sequences automatically using the gappyout command. Maximum parsimony (MP) analysis was done using PAUP XSEDE [66]. Maximum likelihood (ML) analysis was performed on XSEDE with the GTR + Gamma model and 1000 replications using RAxML-HPC2 The Bayesian posterior probabilities analysis (BYPP) was carried out using a Markov Chain Monte Carlo (MCMC) algorithm using MrBayes on XSEDE [67]. In order to choose the best-fit evolutionary models for each dataset, jModeltest 2.1.10 and the Akaike Information Criterion (AIC) were employed on the CIPRES platform. Four MCMC chains were run from random trees for 1,000,000 generations and sampled every 100th generation. The first 25% of the generated trees were ignored as burn-in and the remaining trees were used for analyzing the posterior probabilities. Gaps were considered missing data, and ambiguously aligned parts were eliminated. The phylogenetic trees were visualized in FigTree v.1.4.0 [68], and were further edited in Adobe Illustrator CC 22.0.0 (Adobe Systems, San Jose, CA, USA).

4.4. Pathogenicity Assay

Koch’s postulates were applied according to the procedures demonstrated by Bhunjun et al., (2021) to confirm the pathogenicity of our isolates [69]. Three replicates of detached leaves from an organic farm were considered for both wounded and non-wounded assays using mycelial plug incubation because of the lack of culture sporulation. The pineapple leaves were surface sterilized by washing them in 70% ethanol for 2 min, then in 2% sodium hypochlorite for 2 min, followed by three washes with sterile distilled water and laminar air drying. We chose a pineapple leaf instead of fruit to accurately assess symptoms and fungal spread through the host. Mycelial plugs were obtained from the fresh colonies grown on PDA (10-day colonies). Control inoculations were performed using uninoculated PDA plugs. In a moist chamber at 28 °C and 80% relative humidity, the inoculated and control leaves were incubated. Koch’s postulates were confirmed by re-isolating the fungus from the infected leaves. The re-isolated fungus was identified based on cultural and morphological features.

Author Contributions

Conceptualization, R.S.J.; Methodology, A.A.; Formal analysis, A.A. and R.S.J.; Investigation, A.A.; Resources, R.S.J.; Data curation, A.A.; Writing—original draft, A.A.; Writing—review & editing, R.S.J. and K.D.H.; Supervision, R.S.J.; Project administration, R.S.J.; Funding acquisition, R.S.J. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by National Research Council of Thailand (NRCT) grant entitled “Biodiversity, taxonomy, phylogeny and evolution of Colletotrichum in northern Thailand” (grant no. NRCT-TRG010).

Data Availability Statement

Publicly available datasets were analyzed in this study. These data can be found here: https://www.ncbi.nlm.nih.gov (accessed on 12 November 2022).

Acknowledgments

We would like to thank KC. Mallikarathna and S. Wangsafoo for providing the organic pineapple leaves to carry out the pathogenicity tests. Alireza Armand would like to thank Arttapon Walker for his kind help in obtaining local information.

Conflicts of Interest

The authors declare no conflict of interest.

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Figure 1. Maximum parsimony tree of the Colletotrichum gloeosporioides species complex generated by analysis of combined ITS, ACT, CHS-1, GAPDH, and TUB2 sequence data. The tree was rooted with Colletotrichum truncatum (CBS 151.35) and Colletotrichum acidae (MFLUCC 17.2659). Maximum likelihood and maximum parsimony bootstrap values ≥ 50% and bayesian posterior probabilities ≥ 0.90 are shown near the nodes, respectively. Type strains are in bold and the newly generated isolates are in red.
Figure 1. Maximum parsimony tree of the Colletotrichum gloeosporioides species complex generated by analysis of combined ITS, ACT, CHS-1, GAPDH, and TUB2 sequence data. The tree was rooted with Colletotrichum truncatum (CBS 151.35) and Colletotrichum acidae (MFLUCC 17.2659). Maximum likelihood and maximum parsimony bootstrap values ≥ 50% and bayesian posterior probabilities ≥ 0.90 are shown near the nodes, respectively. Type strains are in bold and the newly generated isolates are in red.
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Plants 12 00971 g002 550
Figure 2. Colletotrichum fructicola P76 (MFLU 22-0302); (a,b). Rotted pineapple fruit; (c). Acervuli on the fruit; (d). Setae; (e). Conidiophores; (f). Conidiogenous cells and conidial attachment; (g). Conidia; (h). Appressoria; (i). Upper and reverse view of colony on PDA. Scale bars: (c) = 200 µm, (d) = 20 µm, (e–h) = 10 µm.
Figure 2. Colletotrichum fructicola P76 (MFLU 22-0302); (a,b). Rotted pineapple fruit; (c). Acervuli on the fruit; (d). Setae; (e). Conidiophores; (f). Conidiogenous cells and conidial attachment; (g). Conidia; (h). Appressoria; (i). Upper and reverse view of colony on PDA. Scale bars: (c) = 200 µm, (d) = 20 µm, (e–h) = 10 µm.
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Plants 12 00971 g003 550
Figure 3. Colletotrichum fructicola P76-3 (MFLUCC 22-0182); (a). Symptomatic leaves; (b). Conidial masses on PDA; (c). Acervuli on PDA; (d). Conidial attachment; (e–g). Conidia; (h,i). Appressoria; (j). Upper and reverse view of colony on PDA. Scale bars: (d–i) 10 µm.
Figure 3. Colletotrichum fructicola P76-3 (MFLUCC 22-0182); (a). Symptomatic leaves; (b). Conidial masses on PDA; (c). Acervuli on PDA; (d). Conidial attachment; (e–g). Conidia; (h,i). Appressoria; (j). Upper and reverse view of colony on PDA. Scale bars: (d–i) 10 µm.
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Figure 4. Pathogenicity testing on pineapple leaves. Symptoms (dieback) on days 4 (d4), 6 (d6), 8 (d8), 10 (d10), 12 (d12), and 14 (d14) after inoculation are shown. C: Control, W: Wounded, NW: Non-wounded.
Figure 4. Pathogenicity testing on pineapple leaves. Symptoms (dieback) on days 4 (d4), 6 (d6), 8 (d8), 10 (d10), 12 (d12), and 14 (d14) after inoculation are shown. C: Control, W: Wounded, NW: Non-wounded.
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Table
Table 1. Base pair differences between C. fructicola (ICMP 18581) and two newly isolated strains.
Table 1. Base pair differences between C. fructicola (ICMP 18581) and two newly isolated strains.
IsolateITSACTCHS-1GAPDHTUB2
P762/511 bp0/256 bp0/241 bp0/248 bp1/402 bp
P76-33/511 bp1/256 bp0/241 bp0/248 bp0/402 bp
Table
Table 2. Primers used in this study.
Table 2. Primers used in this study.
GenePrimerSequence (5′ → 3′)References
ITSITS 5
ITS 4		GGA AGT AAA AGT CGT AAC AAG G
TCC TCC GCT TAT TGA TAT GC		[60]
ACTACT-512F
ACT-783R		ATG TGC AAG GCC GGT TTC GC
TAC GAG TCC TTC TGG CCC AT		[61]
CHS-1CHS-79F
CHS-345R		TGG GGC AAG GAT GCT TGG AAG AAG
TGG AAG AAC CAT CTG TGA GAG TTG		[61]
GAPDHGDF
GDR		GCC GTC AAC GAC CCC TTC ATT GA
GGG TGG AGT CGT ACT TGA GCA TGT		[62]
TUB2BT-2Fd
BT-4Rd		GTB CAC CTY CAR ACC GGY CAR TG
CCR GAY TGR CCR AAR ACR AAG TTG TC		[63]
Table
Table 3. Taxa and their GenBank accession numbers used in the phylogenetic analysis.
Table 3. Taxa and their GenBank accession numbers used in the phylogenetic analysis.
TaxaStrains GenBank Accession Numbers
ITSGAPDHCHS-1ACTTUB
Colletotrichum acidaeMFLUCC 17-2659 *MG996505MH003691MH003694MH003697MH003700
C. aenigmaICMP 18608 *JX010244JX010044JX009774JX009443JX010389
C. aeschynomenesICMP 17673 *,
ATCC 201874		JX010176JX009930JX009799JX009483JX010392
C. alataeCBS 304.67 *,
ICMP 17919		JX010190JX009990JX009837JX009471JX010383
C. alienumICMP 12071 *JX010251JX010028JX009882JX009572JX010411
C. aotearoaICMP 18537 *JX010205JX010005JX009853—JX010420
C. arecicolaCGMCC 3.19667 *MK914635—MK935541MK935374MK935498
C. artocarpicolaMFLUCC 18-1167 *MN415991MN435568MN435569MN435570MN435567
C. asianumICMP 18580 *,
CBS 130418		JX010196JX010053JX009867JX009584JX010406
C. analogumYMF1.06943 *OK030860OK513663OK513559OK513599OK513629
C. camelliaeCGMCC 3.14925, LC1364 *KJ955081KJ954782MZ799255KJ954363KJ955230
C. cangyuanensisYMF1.05001 *OK030864OK513667OK513563OK513603OK513633
C. changpingenseCGMCC 3.17582 *, SA0016, MFLUCC 15-0022KP683152KP852469KP852449KP683093KP852490
C. chiangmaienseMFLUCC 18-0945 *MW346499MW548592MW623653MW655578—
C. chrysophilumURM 7368, CMM4268 *KX094252KX094183KX094083KX093982KX094285
C. cigarroICMP 18539 *JX010230JX009966JX009800JX009523JX010434
C. clidemiaeICMP 18658 *JX010265JX009989JX009877JX009537JX010438
C. cobbittienseBRIP 66219 *MH087016MH094133MH094135MH094134MH094137
C. conoidesCGMCC 3.17615, CAUG17, LC6226 *KP890168KP890162KP890156KP890144KP890174
C. cordylinicolaMFLUCC 090551 *, ICMP 18579JX010226JX009975JX009864HM470234JX010440
C. dimorphumYMF1.07309 *OK030867OK513670OK513566OK513606OK513636
C. dracaenigenumMFLUCC 19-0430 *MN921250MT215577MT215575MT313686—
C. endophyticaMFLUCC 13-0418, LC0324 *KC633854KC832854MZ799261KF306258MZ673954
C. fici-septicaeMFLU 19-2770 *MW114367MW183774MW177701MW151585—
C. fructicolaICMP 18581 *,
CBS 130416		JX010165JX010033JX009866FJ907426JX010405
C. fructicolaMFLUCC 17-0555MG646969MG646936MG646932MG646944MG646928
C. fructicolaMFLUCC 17-0613MG646968MG646935MG646933MG646939MG646927
C. fructicolaP76,
MFLUCC 22-0181		OQ048649OQ067350OQ067349OQ067348OQ067351
C. fructicolaP76-3,
MFLUCC 22-0182		OQ048650OQ067354OQ067353OQ067352OQ067355
C. fructivorumColl1414, BPI 884103, CBS133125 *JX145145MZ664047MZ799259MZ664126JX145196
C. gloeosporioidesIMI 356878 *, ICMP 17821, CBS 112999JQ005152JQ005239JQ005326JQ005500JQ005587
C. gracileYMF1.06939 *OK030868OK513671OK513567OK513607OK513637
C. grevilleaeCBS 132879,
CPC 15481 *		KC297078KC297010KC296987KC296941KC297102
C. grossumCGMCC 3.17614, CAUG7, LC6227 *KP890165KP890159KP890153KP890141KP890171
C. hebeienseMFLUCC 13-0726 *KF156863KF377495KF289008KF377532KF288975
C. hederiicolaMFLU 15-0689 *MN631384—MN635794MN635795—
C. hellenienseCBS 142418,
CPC 26844 *		KY856446KY856270KY856186KY856019KY856528
C. henanenseLC3030, CGMCC 3.17354, LF238 *KJ955109KJ954810MZ799256KM023257KJ955257
C. horiiNBRC 7478 *, ICMP 10492, MTCC 10841GQ329690GQ329681JX009752JX009438JX010450
C. hystricisCBS 142411,
CPC 28153 *		KY856450KY856274KY856190KY856023KY856532
C. jiangxienseCGMCC 3.17363 *KJ955201KJ954902—KJ954471KJ955348
C. kahawaeIMI 319418 *,
ICMP 17816		JX010231JX010012JX009813JX009452JX010444
C. makassarenseCBS 143664 *MH728812MH728820MH805850MH781480MH846563
C. musaeCBS 116870 *, ICMP 19119, MTCC 11349HQ596292HQ596299JX009896HQ596284HQ596280
C. nanhuaensisYMF1.04993 *OK030870OK513673OK513569OK513609OK513639
C. nullisetosumYMF1.06946 *OK030872OK513675OK513571OK513611OK513641
C. nupharicolaCBS 470.96 *,
ICMP 18187		JX010187JX009972JX009835JX009437JX010398
C. oblongisporumYMF1.06938 *OK030874OK513677OK513573—OK513643
C. parvisporumYMF1.06942 *OK030876OK513679OK513575OK513613OK513645
C. pandanicolaMFLUCC 17-0571 *MG646967MG646934MG646931MG646938MG646926
C. perseaeCBS 141365 *, GA100KX620308KX620242MZ799260KX620145KX620341
C. proteaeCBS 132882 *KC297079KC297009KC296986KC296940KC297101
C. pseudotheobromicolaMFLUCC 18-1602 *MH817395MH853675MH853678MH853681MH853684
C. psidiiCBS 145.29 *,
ICMP 19120		JX010219JX009967JX009901JX009515JX010443
C. queenslandicumICMP 1778 *JX010276JX009934JX009899JX009447JX010414
C. rhexiaeColl1026,
BPI 884112,
CBS 133134 *		JX145128MZ664046MZ799258MZ664127JX145179
C. salsolaeICMP 19051 *JX010242JX009916JX009863JX009562JX010403
C. siamenseICMP 18578 *,
CBS 130417		FJ972613FJ972575JX009865FJ907423FJ907438
C. syzygiicolaDNCL021,
MFLUCC 10-0624 *		KF242094KF242156—KF157801KF254880
C. tainanenseCBS 143666 *MH728818MH728823MH805845MH781475MH846558
C. temperatumCBS 133122 *, Coll883, BPI 884100JX145159MZ664045MZ799254MZ664125JX145211
C. tengchongenseYMF 1.04950 *OL842169OL981264OL981290OL981238—
C. theobromicolaCBS 124945 *,
ICMP 18649		JX010294JX010006JX009869JX009444JX010447
C. tiICMP 4832 *JX010269JX009952JX009898JX009520JX010442
C. tropicaleCBS 124949 *, ICMP 18653, MTCC 11371JX010264JX010007JX009870JX009489JX010407
C. truncatumCBS 151.35 *GU227862GU228254GU228352GU227960GU228156
C. viniferumGZAAS 5.08601 *, yg1JN412804JN412798—JN412795JN412813
C. vulgarisYMF 1.04940 *OL842170OL981265OL981291OL981239—
C. wuxienseCGMCC 3.17894 *KU251591KU252045KU251939KU251672KU252200
C. xanthorrhoeaeBRIP 45094 *, ICMP 17903, CBS 127831JX010261JX009927JX009823JX009478JX010448
C. xishuangbannaenseMFLUCC.19-0107 *MW346469MW537586MW660832MW652294—
C. yulongenseCFCC.50818 *MH751507MK108986MH793605MH777394MK108987
C. yunajiangensisYMF1.04996 *OK030885OK513686OK513583OK513620OK513649
Type strains are indicated with “*”. The isolates sequenced in this study are in bold.
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Armand, A.; Hyde, K.D.; Jayawardena, R.S. First Report of Colletotrichum fructicola Causing Fruit Rot and Leaf-Tip Dieback on Pineapple in Northern Thailand. Plants 2023, 12, 971. https://doi.org/10.3390/plants12040971

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Armand A, Hyde KD, Jayawardena RS. First Report of Colletotrichum fructicola Causing Fruit Rot and Leaf-Tip Dieback on Pineapple in Northern Thailand. Plants. 2023; 12(4):971. https://doi.org/10.3390/plants12040971

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Armand, Alireza, Kevin David Hyde, and Ruvishika Shehali Jayawardena. 2023. "First Report of Colletotrichum fructicola Causing Fruit Rot and Leaf-Tip Dieback on Pineapple in Northern Thailand" Plants 12, no. 4: 971. https://doi.org/10.3390/plants12040971

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