Downregulation of SlIAA15 in tomato altered stem xylem development and production of volatile compounds in leaf exudates
Downregulation of SlIAA15 in tomato altered stem xylem development and production of volatile compounds in leaf exudates
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DOI：
10.4161/psb.20723
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发表时间：
2012-01-01
影响因子：
2.9
通讯作者：
Li, Zhengguo
中科院分区：
文献类型：
--
作者：
Deng, Wei;Yan, Fang;Li, Zhengguo
Aux/IAA 家族基因编码短寿命核蛋白，在生长素信号转导中充当转录调节因子。据报道，Aux/IAA 基因控制植物发育的许多过程。我们最近的研究表明，番茄中 SlIAA15 的下调会降低顶端优势，改变腋芽发育模式，增加侧根形成和叶子厚度。 SlIAA15 抑制的细胞系表现出毛状体密度的强烈降低，表明 SlIAA15 参与毛状体的形成。在这里，我们报道了与野生型植物相比，SlIAA15 抑制的转基因株系显示出木质部细胞数量增加。此外，在 SlIAA15 下调的叶片中，毛状体分泌物中的单萜含量显着降低。结果提供了 SlIAA15 在叶片分泌物中挥发性化合物的产生和木质部发育中的作用，清楚地表明 Aux/IAA 基因家族的成员可以发挥独特且特定的功能。
The Aux/IAA family genes encode short-lived nuclear proteins that function as transcriptional regulators in auxin signal transduction. Aux/IAA genes have been reported to control many processes of plant development. our recent study showed that downregulation of SlIAA15 in tomato reduced apical dominance, altered pattern of axillary shoot development, increased lateral root formation and leaves thickness. the SlIAA15 suppressed lines display strong reduction of trichome density, suggesting that SlIAA15 is involved in trichome formation. here, we reported that SlIAA15-suppressed transgenic lines display increased number of xylem cells compared with wild-type plants. moreover, the monoterpene content in trichome exudates are significantly reduced in SlIAA15 downregulated leaves. the results provide the roles of SlIAA15 in production of volatile compounds in leaf exudates and xylem development, clearly indicating that members of the Aux/IAA gene family can play distinct and specific functions.