The activation and regulation of Ca-CaM signaling system on the activity of Ca2+-ATPase and H+- ATPase in leaves of longan under stimulated acid rain stress
Longan (Dimocarpus longana Lour. cv. Wulongling) of uniform one-aged seedlings grown in pots were selected to study the activation and regulation of Ca-CaM signalling system on the activity of Ca2+-ATPase and H+-ATPase in leaves of longan under stimulated acid rain stress and its exogenous Ca2+ regulation. The results showed that the content of calmodulin (CaM) was influenced by the intensity and duration of simulated acid rain. The CaM content fluctuated during stress, but the fluctuating scope decreased gradually while stress duration prolonged. The activities of H+-ATPase and Ca2+-ATPase were also influenced by stress intensity and duration. Both of Ca2+-ATPase and H+-ATPase in leaves were very sensitive to acid rain, and their activities were significantly inhibited under the acid rain stress of pH 3.5 and pH 2.5.The CaM content, activities of Ca2+-ATPase and H+-ATPase in leaves were activated by spraying 10 mM Ca2+, and reduced by spraying calmodulin inhibitor chlorpromazine (CPZ) with concentration of 2 mM, and the calcium inhibitor EGTA with 5 mM.
acid rain Longan (Dimorcarpus longana Lour.) calmodulin (CaM) Ca2+-ATPase H+-ATPase Ca2+ modulation
Pan Tengfei Li Yongyu Zheng Shan Ma Cuilan Qiu Dongliang
College of Horticulture Fujian Agriculture and Forestry University Fuzhou, China
国际会议
上海
英文
3967-3972
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）