Tissue-specific auxin signaling in response to temperature fluctuation
Tissue-specific auxin signaling in response to temperature fluctuation
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DOI：
10.4161/psb.5.11.13706
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发表时间：
2010-01-01
影响因子：
2.9
通讯作者：
Higashitani, Atsushi
中科院分区：
文献类型：
--
作者：
Sakata, Tadashi;Yagihashi, Nao;Higashitani, Atsushi
生长素水平在细胞和组织中受到运输和局部生物合成的良好调节，其分布对细胞增殖、分化、发育、趋向性和高温反应的调节具有重要意义。生长素生物合成在某些植物组织中随着温度升高而被激活。相反，我们的研究表明，通过抑制YUCCA生长素生物合成基因的转录，雄性组织特异性生长素减少是高温伤害的主要原因，导致拟南芥和大麦Hordeum vulgare L.花粉发育流产，并且外源生长素可以逆转这种流产，这表明在当前全球变暖危机下，外源生长素可以保持作物产量。
Auxin levels are well regulated in cells and tissues by both transport and local biosynthesis, and its distribution is important for the modulation of cell proliferation, differentiation, development, tropisms and high-temperature response. Activation of auxin biosynthesis with increased temperatures reported in certain plant tissues. In contrast, our studies indicated that male tissue-specific auxin reduction via transcriptional repression of the YUCCA auxin biosynthesis genes is the primary cause of high temperature injury, which leads the abortion of pollen development in Arabidopsis and barley Hordeum vulgare L. Furthermore, the abortion can be reversed by the application of exogenous auxin, suggesting that the application may maintain crop yields during the current global warming crisis.