79 細胞伸長におけるアラビノガラクタン蛋白質の機能解析

概要

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Arabinogalactan proteins (AGPs) are a class of proteoglycans that have been implicated in plant growth and development. The possible role of AGP in cell elongation was examined by applying Yariv regents, and by analysis of transgenic plants overproducing AGPs. β-glucosyl Yariv reagent that selectively interacts with AGPs inhibited hypocotyl elongation promoted by GA and IAA treatment of both intact cucumber seedlings and hypocotyls segments of azuki. Root elongation of cucumber seedling was also reduced by β-glucosyl Yariv treatment. In addition, transgenic tobacco overexpressing CsAGP1 encoding AGP showed a taller stature and a lager amount of AGPs compared to wild type plants. These data strongly suggest that AGPs are essential component for normal cell elongation. To find out the possible mechanism of AGP in cell elongation, we examined the effect of Yariv reagents on the change of microtubule orientation in azuki section. Yariv regents had no significant effect on the alignment of microtubule. We are also examining the effect of the Yariv regents on cellulose synthesis.
植物化学調節学会の論文
2002-10-31