Zhu Ziqiang, Lee Benjamin
College of Life Sciences, Nanjing Normal University, Nanjing 210023, China
Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
Plant Cell Physiol. 2015 Mar;56(3):414-20. doi: 10.1093/pcp/pcu171. Epub 2014 Nov 29.
One strategy for sessile plants to adapt to their surrounding environment involves the modulation of their various internal phytohormone signaling and distributions when the plants sense environmental change. There are currently dozens of identified phytohormones in plant cells and they act in concert to regulate plant growth, development, metabolism and defense. It has been determined that phytohormones often act together to achieve certain physiological functions. Thus, the study of hormone-hormone interactions is becoming a competitive research field for deciphering the underlying regulatory mechanisms. Among phytohormones, jasmonate and ethylene present a fascinating case of synergism and antagonism. They are commonly recognized as defense hormones that act synergistically. Plants impaired in jasmonate and/or ethylene signaling are susceptible to infections by necrotrophic fungi, suggesting that these two hormones are both required for defense. Moreover, jasmonate and ethylene also act antagonistically, such as in the regulation of apical hook development and wounding responses. Here, we highlight the recent breakthroughs in the understanding of jasmonate-ethylene co-actions and point out the potential power of studying protein-protein interactions for systematically exploring signal cross-talk.
固着植物适应周围环境的一种策略是，当植物感知到环境变化时，调节其各种内部植物激素信号和分布。目前在植物细胞中已鉴定出数十种植物激素，它们共同作用以调节植物的生长、发育、代谢和防御。现已确定，植物激素通常共同作用以实现某些生理功能。因此，激素 - 激素相互作用的研究正成为一个极具竞争力的研究领域，用于破译潜在的调控机制。在植物激素中，茉莉酸和乙烯呈现出协同作用和拮抗作用的有趣案例。它们通常被认为是起协同作用的防御激素。茉莉酸和/或乙烯信号传导受损的植物易受坏死营养型真菌的感染，这表明这两种激素对于防御都是必需的。此外，茉莉酸和乙烯也具有拮抗作用，例如在顶端弯钩发育和伤口反应的调节中。在这里，我们强调了在理解茉莉酸 - 乙烯共同作用方面的最新突破，并指出研究蛋白质 - 蛋白质相互作用对于系统探索信号串扰的潜在作用。
