Shading of mature leaves systemically regulates photosynthesis and leaf area of new developing leaves via hormones

文献类型： 外文期刊

第一作者： Wu, Y. S.

作者： Wu, Y. S.;Wang, Y. M.;Yang, W. Y.;Wu, Y. S.;Wang, Y. M.;Yang, W. Y.;Wu, Y. S.;Wang, Y. M.;Yang, W. Y.;Gong, W. Z.

作者机构：

关键词： leaf structure; photosynthesis; shade; systemic response

期刊名称：PHOTOSYNTHETICA （ 影响因子：2.1； 五年影响因子：2.9 ）

ISSN： 0300-3604

年卷期： 2019 年 57 卷 1 期

页码：

收录情况： SCI

摘要： In order to explore whether leaf area of developing leaves was regulated by systemic irradiance signal from mature leaves, we investigated the leaf area, leaf anatomy, photosynthesis, auxin, gibberellin, and cytokinin contents of new developing leaves in soybean growing under conditions of shaded mature leaves (MS), shaded whole plants (WS), and under full sunlight (NS). The results showed that developing leaves under MS exhibited the higher leaf area and leaf mass than that of WS. Blade thickness, palisade tissue thickness, sponge tissue thickness, cell size, cell numbers, net photosynthetic rate, stomatal conductance, transpiration rate, and cytokinin content of developing leaves under MS were lower, while auxin and gibberellin contents were higher than that of NS. These results indicate that the leaf area, leaf anatomy, and photosynthesis of developing leaves were regulated by the shading environment of mature leaves. Growth hormones may possibly act as candidate signal substances to systemic regulation of leaf area development.

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