The Graduate School of Natural Science and Technology; Okayama University, Tsushima-Naka, Okayama, Japan.
Plant Signal Behav. 2011 Jul;6(7):939-41. doi: 10.4161/psb.6.7.15439.
Plants tightly control stomatal aperture in response to various environmental changes. A drought-inducible phytohormone, abscisic acid (ABA), triggers stomatal closure and ABA signaling pathway in guard cells has been well studied. Similar to ABA, methyl jasmonate (MeJA) induces stomatal closure in various plant species but MeJA signaling pathway is still far from clear. Recently we found that Arabidopsis calcium dependent protein kinase CPK6 functions as a positive regulator in guard cell MeJA signaling and provided new insights into cytosolic Ca2+-dependent MeJA signaling. Here we discuss the MeJA signaling and also signal crosstalk between MeJA and ABA pathways in guard cells.
植物通过严格控制气孔开度来响应各种环境变化。脱落酸（ABA）作为一种干旱诱导型植物激素，可引发保卫细胞的气孔关闭，ABA 信号通路在保卫细胞中已得到深入研究。类似于 ABA，茉莉酸甲酯（MeJA）也能诱导多种植物物种的气孔关闭，但 MeJA 信号通路仍远未阐明。最近，我们发现拟南芥钙依赖蛋白激酶 CPK6 在保卫细胞 MeJA 信号中作为正调节剂发挥作用，为细胞溶质 Ca2+-依赖性 MeJA 信号提供了新的见解。本文我们讨论了 MeJA 信号，以及 MeJA 和 ABA 途径在保卫细胞中的信号串扰。
