Signaling mechanism mediating the anti-senescence effect of low-concentration chemical stressors sprayed onto bean seedlings |
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| Authors: | P ter Nyitrai, P lma Cz vek, Mih ly
v ri, ron Keresztes |
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| Affiliation: | aDepartment of Plant Physiology and Molecular Plant Biology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary;bDepartment of Plant Anatomy, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary;cDepartment of Analytical Chemistry, Eötvös Loránd University, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary |
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| Abstract: | The anti-senescence effect of low-concentrations of some stress-inducing compounds of different toxicity and chemical nature such as Cd and Pb salts or 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) was investigated in the primary leaves of bean seedlings. In these leaves treated by spraying, chlorophyll content and photosynthetic activity increased, the active cytokinin content of roots and leaves was also significantly higher as compared to the control. These symptoms of stimulation could be eliminated by the inhibitors Li and PD [2-(2′-amino-3′-methoxyphenyl)-oxanaphthalen-4-one] added to each agent, indicating the involvement of PIP2-IP3/DAG and MAPK signaling pathways, respectively, in the response. |
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| Keywords: | Chemical stressors Cytokinin MAPK pathway Oxidative stress PIP2-IP3/DAG pathway |
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