Yoo Sang-Dong, Cho Younghee, Sheen Jen
Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA.
Trends Plant Sci. 2009 May;14(5):270-9. doi: 10.1016/j.tplants.2009.02.007. Epub 2009 Apr 15.
The gaseous plant hormone ethylene acts as a pivotal mediator to respond to and coordinate internal and external cues in modulating plant growth dynamics and developmental programs. Genetic analysis of Arabidopsis thaliana has been used to identify key components and to build a linear ethylene-signaling pathway from the receptors through to the nuclear transcription factors. Studies applying integrative approaches have revealed new regulators, molecular connections and mechanisms in ethylene signaling and unexpected links to other plant hormones. Here, we review and discuss recent discoveries about the functional mode of ethylene receptor complexes, dual mitogen-activated protein kinase cascade signaling, stability control of the master nuclear transcription activator ETHYLENE INSENSITIVE 3 (EIN3), and the contextual relationships between ethylene and other plant hormones, such as auxin and gibberellins, in organ-specific growth regulation.
气态植物激素乙烯作为关键介质，在调节植物生长动态和发育程序中响应并协调内部和外部信号。拟南芥的遗传分析已用于鉴定关键组分，并构建从受体到核转录因子的线性乙烯信号通路。采用综合方法的研究揭示了乙烯信号传导中的新调节因子、分子联系和机制，以及与其他植物激素的意外联系。在此，我们综述并讨论了关于乙烯受体复合物的功能模式、双促分裂原活化蛋白激酶级联信号传导、主核转录激活因子乙烯不敏感3（EIN3）的稳定性控制，以及乙烯与其他植物激素（如生长素和赤霉素）在器官特异性生长调节中的背景关系的最新发现。
