BA信号转导过程中CWPOD与MAPK的关系
he Relationship Between Cell Wall Peroxidase and MAPK in Abscisic Acid Signaling Transduction in Maize Leaves
本文探讨了胞壁过氧化物酶（CWPOD）在ABA和H2O2诱导的促分裂原蛋白激酶（MAPK）活化中的作用以及MAPK活化对ABA和H2O2诱导的CWPOD活性的影响。当用CWPOD抑制剂NaN3和KCN处理后再用ABA诱导，结果发现CWPOD抑制剂明显抑制了ZmMPK5的活化，而且MAPKK专一性抑制剂PD98059和U0126预处理也能明显地抑制ABA诱导的CWPOD活性增加。CWPOD抑制剂NaN3和KCN预处理也明显地抑制了H2O2诱导的MAPK的活化，而MAPK专一性抑制剂PD98059和U0126预处理明显地抑制了H2O2诱导的的CWPOD活性增加。这暗示在ABA信号转导中， ABA诱导增加CWPOD的活性，进而诱导H2O2产生，进一步活化MAPK，活化的MAPK继而通过激活相关转录因子从而再次激活CWPOD相关基因的表达，增加的CWPOD 活性，导致H2O2的进一步产生，形成一个以CWPOD介导的ROS放大过程，进而引发相关的级联反应。
he roles of cell wall peroxidase (CWPOD) in MAPK activation-induced by (ABA) and H2O2 and MAPK in CWPOD activation-induced by (ABA) and H2O2 were investigated in leaves of maize (Zea mays L.) plants. We found that pretreatment with several inhibitors of CWPOD, NaN3 and KCN, can arrested the ABA and H2O2-activated ZmMPK5, and pretreatment with MAPK kinase inhibitors, PD98059 and U0126, significantly inhibited the CWPOD activities induced by ABA and H2O2. These results clearly suggest that ABA-acticated CWPOD induces H2O2 accumulation, then activates MAPK, which enhances CWPOD and produduces more H2O2 in the ABA signaling.
张阿英、苏凤侠、谭明普
细胞生物学分子生物学植物学
植物学胞壁过氧化物酶BAMAPK
botanyCWPODABAMAPK
张阿英,苏凤侠,谭明普.BA信号转导过程中CWPOD与MAPK的关系[EB/OL].(2011-01-08)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201101-353.点此复制
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