Studies on the regulation of calcium signaling and the inhibition of TMV with a zincnutrient treatment

摘要：

We studied the inhibition of tobacco mosaic virus (TMV) infections by treatment with 0.1mg·L <1> Zn in liquid culture and determined the effects of this treatment on four variables of the calcium signal system in tobacco leaves. The four variables were the concentrations of Ca<2+> and CaM, measured by atomic absorption spectrophotometers and ELISA, respectively, and the activities of Ca<2+> -ATPase and NADKase in tobacco leaves. The Zn treatment strengthened resistance against TMV, as indicated by the alleviation of TMV infection symptoms. Ca<2+> contents were lower in tobacco leaves of Zn treated plants than in controls, while CaM contents and the activities of Ca<2+> -ATPase, NKDKase were higher. This shows that zinc nutrition affects the regulation of the calcium signaling system, and reduces pathogenic reactions to virus infections. We hypothesize that the calcium- calmodulin messenger system plays a major role in the intercellular signal transduction between tobacco and TMV and has an important function in the phyiological reactions of plant resistance against viruses.

关键词： tobacco TMV Calcium signaling system Zinc

作者: LI Ye WU Yuan-hua ZHAO Xiu-xiang GAO Fen

作者单位: The Key Laboratary of Environmental Engineering, Shenyang University, Shenyang 110044, P. R China Co College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, P. R China College of Plant Protection, Shenyang Agricultural University, Shenyang 10161, P. R China

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 736-737

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）