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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sun, Qing Peng Guo, Yi Sun, Ying Sun, Da Ye Wang, Xiao Jing |
| Copyright Year | 2006 |
| Abstract | The changes in cytosolic Ca2+ levels play important roles in the signal transduction pathways of many environmental and developmental stimuli in plants and animals. We demonstrated that the increase in cytosolic free Ca2+ concentration ([Ca2+]cyt) of Arabidopsis thaliana leaf cells was induced by exogenous application of jasmonic acid (JA). The elevation of [Ca2+]cyt was detected within 1 min after JA treatment by the fluorescence intensity using laser scanning confocal microscopy, and the elevated level of fluorescence was maintained during measuring time. With pretreatment of nifedipine (Nif), a nonpermeable L-type channel blocker, the fluorescence of [Ca2+]cyt induced by JA was inhibited in a dose-dependent manner. In contrast, verapamil, another L-type channel blocker, had no significant effect. Furthermore, Nif repressed JA-induced gene expression of JR1 but verapamil did not. JA-induced gene expression could be mimicked by higher concentration of extracellular Ca2+. W-7 [N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide], an antagonist of calmodulin (CaM), blocked the JA induction of JR1 expression while W-5 [N-(6-aminohexyl)-1-naphthalenesulfonamide], its inactive antagonist, had no apparent effect. These data provide the evidence that the influx of extracellular Ca2+ through Nif sensitive plasma membrane Ca2+ channel may be responsible for JA-induced elevation of [Ca2+]cyt and downstream gene expression, CaM may be also involved in JA signaling pathway. |
| Starting Page | 343 |
| Ending Page | 350 |
| Page Count | 8 |
| File Format | |
| ISSN | 09189440 |
| Journal | Journal of Plant Research |
| Volume Number | 119 |
| Issue Number | 4 |
| e-ISSN | 16180860 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2006-05-18 |
| Publisher Place | Tokyo |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Arabidopsis thaliana Calmodulin [Ca2+]cyt Jasmonic acid |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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