Cell Wall Composition, Biosynthesis and Remodeling during Pollen Tube Growth.
Cell Wall Composition, Biosynthesis and Remodeling during Pollen Tube Growth.
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DOI：
10.3390/plants2010107
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发表时间：
2013-03-07
期刊：
影响因子：
--
通讯作者：
Lehner A
中科院分区：
文献类型：
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作者：
Mollet JC;Leroux C;Dardelle F;Lehner A
花粉管是一种快速生长的细胞，将两个精子细胞运送到胚珠，从而实现双受精过程和种子结籽。为了成功完成这一过程，雌性器官内花粉管生长的空间和时间控制至关重要。它需要大量的细胞壁沉积以促进花粉管快速伸长，并严格控制细胞壁重塑以改变机械性能。此外，在其旅程中，花粉管与雌蕊相互作用，在花粉管营养、引导和排斥自交不亲和花粉方面发挥着关键作用。本综述重点介绍了我们目前在主要细胞壁聚合物（包括来自几种花粉管物种的果胶、半纤维素、纤维素和胼胝质）的生物化学和定位方面的知识。此外，基于转录组数据和功能基因组研究，还描述了花粉管生长过程中可能参与细胞壁重塑的酶及其对细胞壁力学的影响。最后，突变体分析使人们能够深入了解参与花粉管细胞壁生物合成的几个基因的功能，并进一步讨论它们在花粉管生长中的作用。
The pollen tube is a fast tip-growing cell carrying the two sperm cells to the ovule allowing the double fertilization process and seed setting. To succeed in this process, the spatial and temporal controls of pollen tube growth within the female organ are critical. It requires a massive cell wall deposition to promote fast pollen tube elongation and a tight control of the cell wall remodeling to modify the mechanical properties. In addition, during its journey, the pollen tube interacts with the pistil, which plays key roles in pollen tube nutrition, guidance and in the rejection of the self-incompatible pollen. This review focuses on our current knowledge in the biochemistry and localization of the main cell wall polymers including pectin, hemicellulose, cellulose and callose from several pollen tube species. Moreover, based on transcriptomic data and functional genomic studies, the possible enzymes involved in the cell wall remodeling during pollen tube growth and their impact on the cell wall mechanics are also described. Finally, mutant analyses have permitted to gain insight in the function of several genes involved in the pollen tube cell wall biosynthesis and their roles in pollen tube growth are further discussed.