进一步分析拟南芥 RING E3 连接酶 XBAT32 参与乙烯生物合成。
Further analysis of XBAT32, an Arabidopsis RING E3 ligase, involved in ethylene biosynthesis.
机构信息
Department of Biology, Dalhousie University, Halifax, NS, Canada.
出版信息
Plant Signal Behav. 2010 Nov;5(11):1425-9. doi: 10.4161/psb.5.11.13294. Epub 2010 Nov 1.
Abstract
The Arabidopsis RING E3 ligase, XBAT32, was previously characterized as a regulator of lateral root initiation. However, how XBAT32 function to modulate lateral root initiation was unknown. In our recent paper, we demonstrated that XBAT32 is involved in ethylene biosynthesis and it is through this function that XBAT32 is able to regulate lateral root production. Here we discuss a few other findings, observed in the ethylene overproducing mutant, xbat32, that reflect the effect of elevated ethylene levels on plant growth and development. Ethylene signaling also regulates plant responses to adverse environmental conditions such as high salinity. Consistent with ethylene's role as a stress hormone, xbat32 exhibited increased sensitivity to salt stress during seed germination and postgerminative growth. Thus, XBAT32 may also play a role in ethylene mediated response to abiotic stresses.
摘要
拟南芥 RING E3 连接酶 XBAT32 先前被鉴定为侧根起始的调节因子。然而，XBAT32 如何调节侧根起始尚不清楚。在我们最近的论文中，我们证明了 XBAT32 参与乙烯生物合成，正是通过这一功能，XBAT32 能够调节侧根的产生。在这里，我们讨论了在乙烯过量产生突变体 xbat32 中观察到的其他一些发现，这些发现反映了升高的乙烯水平对植物生长和发育的影响。乙烯信号还调节植物对不利环境条件的反应，如高盐度。与乙烯作为应激激素的作用一致，xbat32 在种子萌发和萌发后生长过程中对盐胁迫表现出更高的敏感性。因此，XBAT32 可能在乙烯介导的非生物胁迫反应中也发挥作用。
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