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10.3390/plants13172495
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Article

Enhancing Resistance to Cercospora Leaf Spot in Mung Bean (Vigna radiata L.) through Bradyrhizobium sp. DOA9 Priming: Molecular Insights and Bio-Priming Potential

by
Apisit Songsaeng
1,
Pakpoom Boonchuen
1,
Phongkeat Nareephot
1,
Pongdet Piromyou
2,
Jenjira Wongdee
2,
Teerana Greetatorn
2,
Sukanya Inthaisong
3,
Piyada Alisha Tantasawat
3,
Kamonluck Teamtisong
4,
Panlada Tittabutr
1,
Shusei Sato
5,
Nantakorn Boonkerd
1,
Pongpan Songwattana
2,* and
Neung Teaumroong
1,*
1
School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2
Institute of Research and Development, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
3
School of Crop Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
4
The Center for Scientific and Technological Equipment, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
5
Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
*
Authors to whom correspondence should be addressed.
Plants 2024, 13(17), 2495; https://doi.org/10.3390/plants13172495
Submission received: 26 June 2024 / Revised: 21 August 2024 / Accepted: 4 September 2024 / Published: 5 September 2024
(This article belongs to the Section Plant Protection and Biotic Interactions)
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Abstract

Mung bean (Vigna radiata L.), a vital legume in Asia with significant nutritional benefits, is highly susceptible to Cercospora leaf spot (CLS) caused by Cercospora canescens, leading to significant yield losses. As an alternative to chemical fungicides, bio-priming with rhizobacteria can enhance plant resistance. This study explores the potential of Bradyrhizobium sp. strain DOA9 to augment resistance in mung bean against CLS via root priming. The results reveal that short (3 days) and double (17 and 3 days) priming with DOA9 before fungal infection considerably reduces lesion size on infected leaves by activating defense-related genes, including Pti1, Pti6, EDS1, NDR1, PR-1, PR-2, Prx, and CHS, or by suppressing the inhibition of PR-5 and enhancing peroxidase (POD) activity in leaves. Interestingly, the Type 3 secretion system (T3SS) of DOA9 may play a role in establishing resistance in V. radiata CN72. These findings suggest that DOA9 primes V. radiata CN72′s defense mechanisms, offering an effective bio-priming strategy to alleviate CLS. Hence, our insights propose the potential use of DOA9 as a bio-priming agent to manage CLS in V. radiata CN72, providing a sustainable alternative to chemical fungicide applications.
Keywords: mung bean; Cercospora canescens; Cercospora leaf spot; Bradyrhizobium; bio-priming mung bean; Cercospora canescens; Cercospora leaf spot; Bradyrhizobium; bio-priming

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MDPI and ACS Style

Songsaeng, A.; Boonchuen, P.; Nareephot, P.; Piromyou, P.; Wongdee, J.; Greetatorn, T.; Inthaisong, S.; Tantasawat, P.A.; Teamtisong, K.; Tittabutr, P.; et al. Enhancing Resistance to Cercospora Leaf Spot in Mung Bean (Vigna radiata L.) through Bradyrhizobium sp. DOA9 Priming: Molecular Insights and Bio-Priming Potential. Plants 2024, 13, 2495. https://doi.org/10.3390/plants13172495

AMA Style

Songsaeng A, Boonchuen P, Nareephot P, Piromyou P, Wongdee J, Greetatorn T, Inthaisong S, Tantasawat PA, Teamtisong K, Tittabutr P, et al. Enhancing Resistance to Cercospora Leaf Spot in Mung Bean (Vigna radiata L.) through Bradyrhizobium sp. DOA9 Priming: Molecular Insights and Bio-Priming Potential. Plants. 2024; 13(17):2495. https://doi.org/10.3390/plants13172495

Chicago/Turabian Style

Songsaeng, Apisit, Pakpoom Boonchuen, Phongkeat Nareephot, Pongdet Piromyou, Jenjira Wongdee, Teerana Greetatorn, Sukanya Inthaisong, Piyada Alisha Tantasawat, Kamonluck Teamtisong, Panlada Tittabutr, and et al. 2024. "Enhancing Resistance to Cercospora Leaf Spot in Mung Bean (Vigna radiata L.) through Bradyrhizobium sp. DOA9 Priming: Molecular Insights and Bio-Priming Potential" Plants 13, no. 17: 2495. https://doi.org/10.3390/plants13172495

APA Style

Songsaeng, A., Boonchuen, P., Nareephot, P., Piromyou, P., Wongdee, J., Greetatorn, T., Inthaisong, S., Tantasawat, P. A., Teamtisong, K., Tittabutr, P., Sato, S., Boonkerd, N., Songwattana, P., & Teaumroong, N. (2024). Enhancing Resistance to Cercospora Leaf Spot in Mung Bean (Vigna radiata L.) through Bradyrhizobium sp. DOA9 Priming: Molecular Insights and Bio-Priming Potential. Plants, 13(17), 2495. https://doi.org/10.3390/plants13172495

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