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水稻花药绒毡层:孢粉素生物合成和花粉外壁图案形成的重要生殖细胞层。

Rice anther tapetum: a vital reproductive cell layer for sporopollenin biosynthesis and pollen exine patterning.

作者信息

Tariq N, Yaseen M, Xu D, Rehman H M, Bibi M, Uzair M

机构信息

Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan.

State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Institute of Rice Research, Sichuan Agricultural University, Sichuan, China.

出版信息

Plant Biol (Stuttg). 2023 Mar;25(2):233-245. doi: 10.1111/plb.13485. Epub 2022 Dec 16.

Abstract

The tapetum is the innermost layer of the four layers of the rice anther that provides protection and essential nutrients to pollen grain development and delivers precursors for pollen exine formation. The tapetum has a key role in the normal development of pollen grains and tapetal programmed cell death (PCD) that is linked with sporopollenin biosynthesis and transport. Recently, many genes have been identified that are involved in tapetum formation in rice and Arabidopsis. Genetic mutation in PCD-associated genes could affect normal tapetal PCD, which finally leads to aborted pollen grains and male sterility in rice. In this review, we discuss the most recent research on rice tapetum development, including genomic, transcriptomic and proteomic studies. Furthermore, tapetal PCD, sporopollenin biosynthesis, ROS activity for tapetum function and its role in male reproductive development are discussed in detail. This will improve our understanding of the role of the tapetum in male fertility using rice as a model system, and provide information that can be applied in rice hybridization and that of other major crops.

摘要

绒毡层是水稻花药四层结构的最内层,为花粉粒发育提供保护和必需营养,并为花粉外壁形成提供前体物质。绒毡层在花粉粒的正常发育以及与孢粉素生物合成和转运相关的绒毡层程序性细胞死亡(PCD)中起关键作用。最近,已鉴定出许多参与水稻和拟南芥绒毡层形成的基因。PCD相关基因的基因突变会影响绒毡层的正常PCD,最终导致水稻花粉粒败育和雄性不育。在本综述中,我们讨论了水稻绒毡层发育的最新研究,包括基因组学、转录组学和蛋白质组学研究。此外,还详细讨论了绒毡层PCD、孢粉素生物合成、绒毡层功能的ROS活性及其在雄性生殖发育中的作用。这将增进我们对以水稻为模型系统的绒毡层在雄性育性中作用的理解,并提供可应用于水稻杂交及其他主要作物杂交的信息。

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