کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5907253 | 1160004 | 2012 | 5 صفحه PDF | دانلود رایگان |
The present study assesses the changes in DNA methylation in leaf and root tissues of Jatropha curcas L., induced by salinity stress using methylation sensitive amplification polymorphism (MSAP) markers. Seedlings of 21Â days (d) grown under controlled conditions were subjected to 0-100Â mM salinity treatment for 24Â h (1Â d). Immediate changes in DNA methylation and polymorphism in methylated DNA in whole genome of both leaves and roots were assessed using 10 selective combinations of MSAP primers. In root and leaves 70.06% and 57.89% methylation was observed respectively. Similarly 67.22% and 71.21% polymorphism was observed in methylated DNA from root and leaf tissues respectively. Compared with control, the percentage of methylation and methylation polymorphism in roots of plants under different dosages of salinity was found in the order of 50Â mMÂ <Â 25Â mMÂ =Â 100Â mMÂ <Â 75Â mM and 75Â mMÂ <Â 25Â mMÂ <Â 50Â mMÂ <Â 100Â mM respectively. Similarly percentage of methylation and methylation polymorphism in leaves of plants treated with different levels of salinity was found in order of 75Â mMÂ <Â 25Â mMÂ <Â 50Â mMÂ <Â 100Â mM and 50Â mMÂ <Â 25Â mMÂ <Â 100Â mMÂ <Â 75Â mM respectively. The MSAP analysis showed that under salt stress homologous nucleotide sequences in genome from control and salt treated plants of J. curcas showed different patterns of methylation; which suggest that these fragments probably play an important role to induce immediate adaptive responses in Jatropha under salinity stress.
Journal: Gene - Volume 508, Issue 1, 15 October 2012, Pages 125-129