Kazan Kemal, Manners John M
Commonwealth Scientific and Industrial Research Organisation Plant Industry, Queensland Bioscience Precinct, St Lucia, QLD 4067, Australia.
Trends Plant Sci. 2009 Jul;14(7):373-82. doi: 10.1016/j.tplants.2009.04.005. Epub 2009 Jun 24.
Although the plant growth hormone auxin has long been recognized as a regulator of plant defense, the molecular mechanisms involved are still largely unknown. Recent studies reviewed here reveal new insights into the role of auxin in plant defense. Similar to the signaling pathways of the defense-associated plant hormones salicylic acid (SA) and jasmonic acid (JA), auxin signaling differentially affects resistance to separate pathogen groups. Recent evidence suggests that the auxin and SA pathways act in a mutually antagonistic manner during plant defense, whereas auxin and JA signaling share many commonalities. Auxin also affects disease outcomes indirectly through effects on development. Here, we discuss the multiple ways in which auxin regulation of plant growth and development might be intimately linked to plant defense.
尽管植物生长激素生长素长期以来一直被认为是植物防御的调节因子，但其涉及的分子机制仍大多未知。本文综述的最新研究揭示了生长素在植物防御中的作用的新见解。与防御相关的植物激素水杨酸（SA）和茉莉酸（JA）的信号通路类似，生长素信号传导对不同病原体组的抗性有不同影响。最近的证据表明，在植物防御过程中，生长素和SA途径以相互拮抗的方式起作用，而生长素和JA信号传导有许多共同之处。生长素还通过对发育的影响间接影响疾病结果。在这里，我们讨论了生长素对植物生长和发育的调节可能与植物防御密切相关的多种方式。
