Ethylene directs auxin to control root cell expansion.
Ethylene directs auxin to control root cell expansion.
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乙烯将生长素指导以控制根细胞的膨胀。
DOI：
10.1111/j.1365-313x.2010.04373.x
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发表时间：
2010-12
期刊：
影响因子：
--
通讯作者：
Bartel B
中科院分区：
文献类型：
--
作者：
Strader LC;Chen GL;Bartel B
根形态发生是通过细胞分裂和扩张的调节来控制的。我们分离了 eto1 乙烯过量产生者的等位基因，作为生长素抗性突变体 ibr5 的抑制子，从而促进了对植物激素生长素和乙烯之间控制根表皮细胞伸长和根毛伸长的串扰的检查。我们检查了 eto1 与减少生长素反应或运输的突变体的相互作用，发现乙烯过量产生部分恢复了生长素对这些突变体的反应性。此外，我们发现内源乙烯对 eto1 幼苗根细胞扩张的影响部分受到抑制生长素信号传导的阻碍，并且通过阻止生长素流入而被完全抑制。这些数据提供了对这两种关键植物激素之间相互作用的深入了解，并表明内源乙烯指导生长素控制根细胞扩张。
Root morphogenesis is controlled by the regulation of cell division and expansion. We isolated an allele of the eto1 ethylene overproducer as a suppressor of the auxin-resistant mutant ibr5, prompting an examination of crosstalk between the phytohormones auxin and ethylene in control of root epidermal cell elongation and root hair elongation. We examined the interaction of eto1 with mutants that have reduced auxin response or transport and found that ethylene overproduction partially restored auxin responsiveness to these mutants. In addition, we found that the effects of endogenous ethylene on root cell expansion in eto1 seedlings were partially impeded by dampening auxin signaling, and were fully suppressed by blocking auxin influx. These data provide insight into the interaction between these two key plant hormones, and suggest that endogenous ethylene directs auxin to control root cell expansion.