Journal Title
Title of Journal: Acta Physiol Plant
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Abbravation: Acta Physiologiae Plantarum
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Publisher
Springer Berlin Heidelberg
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Authors: Zohreh Torabi Fariba Rafiei Leila Shabani Abdolrazagh Danesh Shahraki
Publish Date: 2015/10/31
Volume: 37, Issue: 11, Pages: 248-
Abstract
The current study was conducted to evaluate the physiological and molecular response of selfregenerating annual Medicago species M polymorpha and M lupulina to juglone exposure A randomized complete block design was performed in which two treatment groups consisted of a control and juglone 10−4 M allotted to main plots and genotypes assigned to subplots A significant increase in the concentration of GSH and the GSH/GSSG ratio was observed in both annual Medicago species in response to juglone exposure However such response was greater in M lupulina than M polymorpha The activity of all antioxidant enzymes CAT APX GST and GPOX was significantly increased by juglone In response to juglone the expression of WRKY was significantly decreased The transcription of CBF4 Zpt22 CAT and GST genes was highly induced by juglone in annual Medicago species Higher expression of CBF4 Zpt22 CAT and GST genes in M lupulina which showed more juglonetolerance can be associated with higher tolerance against allelochemical stress It can be concluded that M polymorpha is juglonesensitive because it started to show chlorosis of leaves after a week subjecting to juglone Though M lupulina seems to be more juglonetolerant at least in short term longterm exposure of juglone should also be examined to find out its suitability to grow in walnut orchards Considering the presence of crosstalk between different stresses we can propose that M lupulina is more tolerant to other abiotic stresses compared to M polymorpha
Keywords:
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