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Self-Incompatibility in Plants
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Self-Incompatibility in Plants

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: closed (28 February 2021) | Viewed by 6671

Special Issue Editor

Dr. Sota Fujii

E-Mail Website
Guest Editor
Graduate School of Agricultural Life Sciences, University of Tokyo, 113-8657 Tokyo, Japan
Interests: angiosperm; reproduction; pollen; stigma; pistil; cell-cell interaction; inter-specific barrier; self-incompatibility; evolution; modeling

Special Issue Information

Dear Colleagues,

More than half of plants discriminate between self and non-self pollen via the mechanism known as 'self-incompatibility,' to avoid self-breeding, and to promote out-crossing. But how are they able to do that without an acquired immune system like mammalians? Actually, self-incompatibility is a collection of different pollen-pistil molecular interaction systems that was acquired multiple times in parallel during the evolution of plant species. This provides us the great opportunity to study both (i) cell-to-cell interaction mechanisms and (ii) the evolutionary transition of the mate-selection systems at the same time. This Special Issue will focus on primary research and reviews related to self-incompatibility from disciplines such as genetics, biochemistry, live-imaging, ecological studies, and evolutionary biology. Furthermore, the issue also welcomes studies on inter-specific incompatibility, as recent advances are beginning to reveal the evolutionary relationships between inter-specific incompatibility and self-incompatibility.

Dr. Sota Fujii
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Self-incompatibility
  • Inter-specific incompatibility
  • Cell-to-cell signaling
  • Evolution of reproductive systems
  • Molecular genetics
  • Cellular imaging
  • Ecological biology
  • Evolutionary genomics

Published Papers (2 papers)

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Research

17 pages, 2071 KiB  
Article
Microscopic and Transcriptomic Analysis of Pollination Processes in Self-Incompatible Taraxacum koksaghyz
by Tassilo Erik Wollenweber, Nicole van Deenen, Kai-Uwe Roelfs, Dirk Prüfer and Christian Schulze Gronover
Plants 2021, 10(3), 555; https://doi.org/10.3390/plants10030555 - 16 Mar 2021
Cited by 9 | Viewed by 2796
Abstract
The transition of the Russian dandelion Taraxacum koksaghyz (Asteraceae) to a profitable, alternative crop producing natural rubber and inulin requires the optimization of several agronomic traits, cultivation conditions and harvesting procedures to improve the yield. However, efficient breeding is hindered by the obligatory [...] Read more.
The transition of the Russian dandelion Taraxacum koksaghyz (Asteraceae) to a profitable, alternative crop producing natural rubber and inulin requires the optimization of several agronomic traits, cultivation conditions and harvesting procedures to improve the yield. However, efficient breeding is hindered by the obligatory sexual outcrossing of this species. Several other asters have been investigated to determine the mechanism of self-incompatibility, but the underlying molecular basis remains unclear. We therefore investigated the self-pollination and cross-pollination of two compatible T. koksaghyz varieties (TkMS2 and TkMS3) by microscopy and transcriptomic analysis to shed light on the pollination process. Self-pollination showed typical sporophytic self-incompatibility characteristics, with the rare pollen swelling at the pollen tube apex. In contrast, cross-pollination was characterized by pollen germination and penetration of the stigma by the growing pollen tubes. RNA-Seq was used to profile gene expression in the floret tissue during self-pollination and cross-pollination, and the differentially expressed genes were identified. This revealed three candidates for the early regulation of pollination in T. koksaghyz, which can be used to examine self-incompatibility mechanisms in more detail and to facilitate breeding programs. Full article
(This article belongs to the Special Issue Self-Incompatibility in Plants)
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19 pages, 2392 KiB  
Article
Selection and Validation of Reference Genes for Quantitative RT-PCR Analysis in Corylus heterophylla Fisch. × Corylus avellana L.
by Sihao Hou, Tiantian Zhao, Dan Yang, Qing Li, Lisong Liang, Guixi Wang and Qinghua Ma
Plants 2021, 10(1), 159; https://doi.org/10.3390/plants10010159 - 15 Jan 2021
Cited by 9 | Viewed by 2660
Abstract
(1) Background: the species of Corylus have sporophytic type of self-incompatibility. Several genes related to recognition reaction between pollen and stigma have been identified in hazelnuts. To better understand the self-incompatibility (SI) response, we screened the suitable reference genes by using quantitative real-time [...] Read more.
(1) Background: the species of Corylus have sporophytic type of self-incompatibility. Several genes related to recognition reaction between pollen and stigma have been identified in hazelnuts. To better understand the self-incompatibility (SI) response, we screened the suitable reference genes by using quantitative real-time reverse transcription PCR (qRT-PCR) analysis in hazelnut for the first time. (2) Methods: the major cultivar “Dawei” was used as material. A total of 12 candidate genes were identified and their expression profiles were compared among different tissues and in response to various treatments (different times after self- and cross-pollination) by RT-qPCR. The expression stability of these 12 candidate reference genes was evaluated using geNorm, NormFinder, BestKeeper, Delta Ct, and RefFinder programs. (3) Results: the comprehensive ranking of RefFinder indicated that ChaActin, VvActin,ChaUBQ14, and ChaEF1-α were the most suitable reference genes. According to the stability analysis of 12 candidate reference genes for each sample group based on four software packages, ChaActin and ChaEF1-α were most stable in different times after self-pollination and 4 h after self- and cross-pollination, respectively. To further validate the suitability of the reference genes identified in this study, CavPrx, which the expression profiles in Corylus have been reported, was quantified by using ChaActin and ChaEF1-α as reference genes. (4) Conclusions: our study of reference genes selection in hazelnut shows that the two reference genes, ChaActin and ChaEF1-α, are suitable for the evaluation of gene expression, and can be used for the analysis of pollen-pistil interaction in Corylus. The results supply a reliable foundation for accurate gene quantifications in Corylus species, which will facilitate the studies related to the reproductive biology in Corylus. Full article
(This article belongs to the Special Issue Self-Incompatibility in Plants)
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