Evaluation of heat acclimation and salicylic acid treatments as potent inducers of thermotolerance in Cicer arietinum L.

摘要

The efficacy of heat acclimatization and salicylic acid (SA) treatments in the induction of thermotolerance was tested in different Cicer arietinum genotypes, i.e. ICC 4918, ICC 4969, ICC 7344, ICC 1852, ICC 10035 and ICC 6119. Remarkable reduction in relative injury of membranes was observed in plants pre-treated with SA compared to heat-acclimatized and untreated control seedlings subjected to lethal temperature treatments. Both treatments resulted in increase in protein and proline contents over the control seedlings, which was more significant in SA pre-treatments, with maximum increase being recorded in ICC 4918 and 1852. Both treatments led to the induction of peroxidase (POX), ascorbate peroxidase (APOX) and catalase (CAT) activities. Activities of POX and APOX increased remarkably, while CAT showed a reduction in activity..