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Cell Wall Composition, Biosynthesis and Remodeling during Pollen Tube Growth

Abstract : 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.
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Submitted on : Friday, June 1, 2018 - 2:33:09 PM
Last modification on : Wednesday, April 1, 2020 - 3:08:02 PM
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Jean-Claude Mollet, Christelle Leroux, Flavien Dardelle, Arnaud Lehner. Cell Wall Composition, Biosynthesis and Remodeling during Pollen Tube Growth. Plants, MDPI, 2013, 2 (1), pp.107-147. ⟨10.3390/plants2010107⟩. ⟨hal-01805132⟩

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