Isolation and expression analysis of LoPIP2, a lily (Lilium Oriental Hybrids) aquaporin gene involved in desiccation-induced anther dehiscence

文献类型： 外文期刊

第一作者： Tong, Zheng

作者： Tong, Zheng;Li, Qiuhua;Yang, Yingjie;Dai, Fanwei;Gao, Junping;Hong, Bo;Tong, Zheng;Li, Qiuhua;Yang, Yingjie;Dai, Fanwei

作者机构：

关键词： Lilium Oriental Hybrids;PIP;Desiccation;Anther dehiscence

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2013 年 164 卷

页码：

收录情况： SCI

摘要： The anthers of many flowers accumulate water before undergoing desiccation and finally dehiscence. Here we report that an internal water deficit and ambient humidity inhibited the dehiscence of lily (Lilium Oriental Hybrids) anthers. This implies that this process also occurs during the dehiscence of lily anthers. Based on speculation that plasma membrane intrinsic proteins (PIPs) may facilitate the dehiscence of lily anthers by promoting the passage of water through lily anther cells, we isolated two PIP genes from lily, LoPIP1 and LoPIP2, and characterized their potential roles in anther dehiscence. Both LoPIP1 and LoPIP2 were constitutively expressed during different phases of anther development; however, only LoPIP2 showed significantly reduced levels of expression in anthers of cut lilies subjected to water deficit for >24 h. We silenced LoPIP2 in lily flowers by virus-induced gene silencing and found that this dramatically prevented anther dehiscence. Furthermore, whereas flowers subject to a water deficit had shrunken and indehiscent anthers, flowers in which LoPIP2 expression was silenced had plump and indehiscent anthers that resembled those of flowers exposed to high humidity. Thus the absence of LoPIP2 inhibited anther dehiscence mainly by blocking anther desiccation upon flower opening and not by preventing the earlier stage of water accumulation during anther development and maturation. (C) 2013 Elsevier B.V. All rights reserved.

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