在拟南芥中生成和维持茉莉酸。
Generating and maintaining jasmonic acid in Arabidopsis.
机构信息
National Research Laboratory of Plant Developmental Genetics; Department of Biological Sciences; Seoul National University; Seoul, Korea.
出版信息
Plant Signal Behav. 2008 Oct;3(10):798-800. doi: 10.4161/psb.3.10.5875.
Jasmonic acid (JA) is a lipid-derived plant hormone that mediates diverse biological phenomena. It is one of major goals in JA research field to elucidate the regulatory mechanism of JA level. Recently we have demonstrated cooperative and differentiated roles of two chloroplast localized galactolipases, DGL (DONGLE) and DAD1 (DEFECTIVE IN ANTHER DEHISCENCE 1), for the regulation of JA content. The DGL maintains a basal level of JA in unwounded vegetative tissues, while the DAD1 is involved in JA production in floral tissues. The JA in vegetative tissues regulates cell expansion while the JA produced in flowers regulates pollen maturation. After wounding, the cooperative function of DGL and DAD1 causes drastic increase of JA. The analysis of induction kinetics showed that the two enzymes have temporally separated roles in wound response; DGL in early phase and DAD1 in late phase of JA production. In this addendum, we discuss the implications of our recent findings and extend our working model for JA homeostasis in plants.
茉莉酸（JA）是一种脂类衍生的植物激素，介导多种生物学现象。阐明 JA 水平的调节机制是 JA 研究领域的主要目标之一。最近，我们证明了两种定位于叶绿体的半乳糖脂酶 DGL（DONGLE）和 DAD1（DEFECTIVE IN ANTHER DEHISCENCE 1）在调节 JA 含量方面具有协同和分化的作用。DGL 在未受伤的营养组织中维持 JA 的基础水平，而 DAD1 则参与花组织中 JA 的产生。营养组织中的 JA 调节细胞扩张，而花中产生的 JA 调节花粉成熟。受伤后，DGL 和 DAD1 的协同作用导致 JA 的急剧增加。诱导动力学分析表明，这两种酶在伤口反应中具有时间分离的作用；DGL 在 JA 产生的早期阶段，DAD1 在后期阶段。在这篇增补中，我们讨论了我们最近发现的意义，并扩展了我们在植物中 JA 动态平衡的工作模型。
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