Stress-Induced Changes in Peptidyl-Prolyl cis-trans Isomerase Activity of Sorghum bicolor Seedlings |
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Authors: | AD Sharma N Wajapeyee V Yadav P Singh |
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Institution: | (1) Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005 Punjab, India |
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Abstract: | Developmental changes and effects of various abiotic stresses on peptidyl prolyl cis-trans isomerase (PPIase) activity were studied in the seedlings of sorghum Sorghum bicolor (L.) Moench cv. CSH-6]. The PPIase activity of sorghum seedlings markedly decreased after two days of germination. Up to
90 % of the PPIase activity was inhibited by cyclosporin-A. Maximal increase in specific PPIase activity in the 3-d-old seedlings
was observed in response to osmotic stress and it was transient in nature. The stress-induced enhancement in PPIase activity,
depending upon tissue and stress treatment, was due to induction of cyclophilins as well as other PPIases. Osmotic stress-induced
enhancement in PPIase activity in the drought susceptible cv. SPRU-94008B was maximal in roots, as compared to shoots in the
drought tolerant cv. ICSV-272.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | abiotic stresses cyclophilin sorghum |
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