Involvement of Ca^2+/CaM in the signal transduction of acetylcholine regulating stomatal movement  

作　　者：WANGHengbin ZHANGShuqiu 等 

机构地区：[1]StateKeyLaboratoryofPlantPhsiologyandBiochemistry,CollegeofBiologicalSciences,ChinaAgriculturalUniversity,Beijing100094,China [2]StateKeyLaboratoryofPlantPhsiologyandBiochemistry,CollegeofBiologicalScien

出　　处：《Chinese Science Bulletin》2003年第4期351-354,共4页

基　　金：supported by the National Key Basic Research Special Funds of China(Grant No.G1999011700).

摘　　要：It has been known that the neurotransmitter acetylcholine (ACh) also exists in plants and is able to regu-late the movement of stomata. In another aspect, Ca2+/CaM as the second messengers have a critical role of signal trans-duction in stomatal guard-cell. Here we showed that Ca2+/CaM were also involved in the ACh regulated stomatal movement. In the medium containing Ca2+, the Ca2+ channel blockers (NIF and Ver) and CaM inhibitors (TFP and W7) could neutralize the ACh induced stomatal opening, however, they are ineffective in the medium containing K+. Those re-sults indicated that Ca2+/CaM were involved in the signal transduction pathway of ACh regulating stomatal move-ment.It has been known that the neurotransmitter acetylcholine (ACh) also exists in plants and is able to regu-late the movement of stomata. In another aspect, Ca2+/CaM as the second messengers have a critical role of signal trans-duction in stomatal guard-cell. Here we showed that Ca2+/CaM were also involved in the ACh regulated stomatal movement. In the medium containing Ca2+, the Ca2+ channel blockers (NIF and Ver) and CaM inhibitors (TFP and W7) could neutralize the ACh induced stomatal opening, however, they are ineffective in the medium containing K+. Those re-sults indicated that Ca2+/CaM were involved in the signal transduction pathway of ACh regulating stomatal move-ment.

关 键 词：植物细胞 气孔运动 信号转导 乙酰胆碱 调节 钙离子 CA^2+ CaM 

分 类 号：Q942.6[生物学—植物学] Q945.19