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Non-self- and self-recognition models in plant self-incompatibility

Nature Plants volume 2, Article number: 16130 (2016) Cite this article

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Abstract

The mechanisms by which flowering plants choose their mating partners have interested researchers for a long time. Recent findings on the molecular mechanisms of non-self-recognition in some plant species have provided new insights into self-incompatibility (SI), the trait used by a wide range of plant species to avoid self-fertilization and promote outcrossing. In this Review, we compare the known SI systems, which can be largely classified into non-self- or self-recognition systems with respect to their molecular mechanisms, their evolutionary histories and their modes of evolution. We review previous controversies on haplotype evolution in the gametophytic SI system of Solanaceae species in light of a recently elucidated non-self-recognition model. In non-self-recognition SI systems, the transition from self-compatibility (SC) to SI may be more common than previously thought. Reversible transition between SI and SC in plants may have contributed to their adaptation to diverse and fluctuating environments.

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Figure 1: Phylogenic distribution of different SI systems in flowering plants.
Figure 2: Self/non-self discrimination in SI of three plant families.
Figure 3: The collaborative non-self-recognition model.
Figure 4: Evolutionary characteristics of male and female SI components in self- and non-self-recognition systems.
Figure 5: A model for new haplotype evolution in the non-self-recognition system.
Figure 6: Possible scenarios for the evolutionary transition from/to non-self- and self-recognition.

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Acknowledgements

This work was supported in part by Grants-in-Aid for Scientific Research on Innovative Areas (23113002, 16H06467, 16H06464 to S.T.; 16H01467 to S.F.), and Grants-in-Aid for Scientific Research (21248014, 25252021, 16H06380 to S.T.) from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).

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  1. Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, 630-0192, Japan

    Sota Fujii, Ken-ichi Kubo & Seiji Takayama

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  1. Sota Fujii
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Correspondence to Seiji Takayama.

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Fujii, S., Kubo, Ki. & Takayama, S. Non-self- and self-recognition models in plant self-incompatibility. Nature Plants 2, 16130 (2016). https://doi.org/10.1038/nplants.2016.130

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