SEO/SEOR蛋白在植物生长发育及逆境响应中的功能研究进展

Progress in the roles of SEO/SEOR proteins in plant growth and development and stress responses

筛管堵塞蛋白(SEO)/筛管堵塞相关蛋白(SEOR)在双子叶植物及部分单子叶植物韧皮部筛管中广泛存在,在植物生长发育相关的生命活动中发挥着独特作用。SEO/SEOR蛋白在韧皮部受伤后堵塞筛孔以避免光同化产物损失,因此其在响应机械损伤、冷、热、盐等非生物胁迫,以及蚜虫、植原体等生物胁迫中发挥了重要作用。本文就SEO/SEOR蛋白的结构与分类、在植物生长发育中的作用、在植物逆境响应中的作用等几方面的研究进展及有待深入探索的问题进行综述,并对未来拟开展的研究方向提出展望,旨在为深入探讨SEO/SEOR蛋白与作物产量的关系及作物逆境抗性增强的机制提供参考依据。

SIEVEELEMENT OCCLUSION(SEO)/SIEVE ELEMENT OCCLUSION-RELATED(SEO/SEOR)prOteins extensively exist in sieve tubes of dicotyledonous and some monocotyledonous plants and play unique roles in various physiological processes of pant growth and development.The rapid sealing of sieve pores by SEO/SEOR proteins after phloem injury facilitates to prevent the critical loss of turgor and photosynthate,which is believed to have important roles in response to abiotic stresses,such as wounding,heat,low-temperature and salt,as well as biotic stresses caused by aphids and phytoplasmas.This review focuses on the progress in the structure and classification of SEO/SEOR proteins,their functions in plant growth and development,and response to abiotic and biotic stresses,and gave an outlook of the research area related to SEO/SOER proteins in the future,so as to provide reference for further study on correlation between SEO/SEOR proteins and crop yield,as well as the mechanism for the enhancement of crop stress resistancecaused by SEO/SEORproteins.