Cellular events of strigolactone signalling and their crosstalk with auxin in roots
Cellular events of strigolactone signalling and their crosstalk with auxin in roots
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DOI：
10.1093/jxb/erv178
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发表时间：
2015-08-01
影响因子：
6.9
通讯作者：
Koltai, Hinanit
中科院分区：
文献类型：
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作者：
Koltai, Hinanit
独脚金内酯是一组新的植物激素，抑制枝条分枝。在根中，它们调节主根生长和侧根形成，并增加根毛伸长。独脚金内酯的接收经由特定的细胞系统发生，该细胞系统包括D14样/M样/SCF复合物，其在感知独脚金内酯信号传导时导致受体的某些降解和下游靶标的释放。这种信号通路最终可能导致肌动蛋白丝成束、细胞运输和质膜中PIN定位的变化。因此，生长素通量可以在茎或根中调节。独脚金内酯也参与根中对磷酸盐条件的响应，通过从质膜消耗PIN 2抑制生长素运输和诱导TIR 1转录以增加生长素感知来起作用。在这些情况下，可能还有其他情况下，独脚金内酯操纵生长素途径，影响其运输，感知或两者兼而有之。然而，独脚金内酯调节植物发育的其他机制和其他植物激素的参与是显而易见的。
Strigolactones are a new group of plant hormones that suppress shoot branching. In roots, they regulate primary-root growth and lateral-root formation and increase root-hair elongation. Reception of strigolactones occurs via a specific cellular system which includes a D14-like/M -like/SCF complex that, upon perception of strigolactone signalling, leads to certain degradation of receptors and to the release of downstream targets. This signalling pathway may eventually result in changes in actin-filament bundling, cellular trafficking, and PIN localization in the plasma membrane. As a result, auxin flux may be regulated in the shoot or root. Strigolactones are also involved with the response to phosphate conditions in roots, acting by both dampening auxin transport via depletion of PIN2 from the plasma membrane and inducing TIR1 transcription to increase auxin perception. In these instances and, possibly, others, strigolactones manipulate the auxin pathway, affecting its transport, perception or both. However, other mechanisms for strigolactone-regulated plant development and the involvement of other plant hormones are evident.