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Title of Journal: Ann Bot

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Abbravation: Annals of Botany

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Narnia

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0305-7364

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Genetic Variability in Recovery Growth and Synthes

Authors: Uma S Prasad T G Kumar M Udaya
Publish Date: 1995/07/01
Volume: 76, Issue: 1, Pages: 43-49
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Abstract

S Uma T G Prasad M Udaya Kumar Genetic Variability in Recovery Growth and Synthesis of Stress Proteins in Response to Polyethylene Glycol and Salt Stress in Finger Millet Annals of Botany Volume 76 Issue 1 July 1995 Pages 43–49 https//doiorg/101006/anbo19951076Marked differences were found among 28 finger millet genotypes Eleusine coracana Gaertn in acquired tolerance to osmotic stress as assessed by the recovery of root growth from severe stress 1·2 MPa polyethylene glycol PEG or 400 mM NaCl However these differences in tolerance were observed only when the seedlings were subjected to a preceding mild induction stress 0·6 MPa PEG or 200 mM NaCl In two contrasting genotypes synthesis of stressinduced proteins was studied Proteins with apparent molecular weight of 7072 52 37 34 and 23 kDa were synthesized in the highly responsive genotype GE 415 and poorly responsive VL 481 genotype following a mild induction stress 200 mM NaCl However GE415 synthesized a 54 kDa protein that was not observed in VL481 Addition of abscisic acid ABA to the induction medium containing 200 mM NaCl enhanced the acquired tolerance of finger millet seedlings over those without ABA in association with the appearance of several ABAresponsive proteins GE415 required much less ABA than VL481 to obtain the same response With 10 µM ABA + 200 mM A NaCl induction stress GE415 had significantly higher endogenous ABA In association with higher levels of ABA GE415 had greater recovery root growth following severe stress from 600 mM NaCl Pretreatment with 10 µM ABA + 200 mM NaCl induced several proteins with apparent molecular weights of 7072 54 45 36 29 and 21 kDa in both genotypes Qualitatively GE415 synthesized a unique 2324 kDa protein and quantitatively there was significantly more of the 21 kDa protein in GE415 compared to VL481 The results indicate that the synthesis of stress proteins is correlated with the observed variation in acquired tolerance of the two genotypesCopyright 1995 1999 Academic Press

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