Roles of RCN1, regulatory A subunit of protein phosphatase 2A, in methyl jasmonate signaling and signal crosstalk between methyl jasmonate and abscisic acid.
Roles of RCN1, regulatory A subunit of protein phosphatase 2A, in methyl jasmonate signaling and signal crosstalk between methyl jasmonate and abscisic acid.
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DOI：
10.1093/pcp/pcn106
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发表时间：
2008-09
影响因子：
4.9
通讯作者：
Naoki Saito;S. Munemasa;Yoshimasa Nakamura;Y. Shimoishi;I. Mori;Y. Murata
中科院分区：
文献类型：
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作者：
Naoki Saito;S. Munemasa;Yoshimasa Nakamura;Y. Shimoishi;I. Mori;Y. Murata
茉莉酸甲酯（MeJA）和脱落酸（阿坝）通过信号串扰诱导气孔关闭。我们研究了调节蛋白磷酸酶2A，RCN 1，在MeJA信号的功能。与野生型植物不同，MeJA和阿坝都不能诱导拟南芥rcn1基因敲除突变体的气孔关闭。无论是茉莉酸甲酯，也不阿坝诱导活性氧（ROS）的生产和抑制内向整流钾通道的活动，在rcn1突变体，但不是在野生型植物。这些结果表明，RCN 1的功能上游的ROS生产和下游的分支点的MeJA信号和阿坝信号在拟南芥保卫细胞。
Methyl jasmonate (MeJA) as well as abscisic acid (ABA) induces stomatal closure with their signal crosstalk. We investigated the function of a regulatory A subunit of protein phosphatase 2A, RCN1, in MeJA signaling. Both MeJA and ABA failed to induce stomatal closure in Arabidopsis rcn1 knockout mutants unlike in wild-type plants. Neither MeJA nor ABA induced reactive oxygen species (ROS) production and suppressed inward-rectifying potassium channel activities in rcn1 mutants but not in wild-type plants. These results suggest that RCN1 functions upstream of ROS production and downstream of the branch point of MeJA signaling and ABA signaling in Arabidopsis guard cells.