Induction of sesquiterpene cyclase gene expression and antioxidant enzyems regulated by exongenous salicylic acid in leaves of Capsicum annuum

Abstract

Abstract: An analysis of the induction of sesquiterpene cyclase gene expression and antioxidant enzymes in Capsicum annuum by exongenous salicylic acid (SA) pointed out that the sesquiterpene cyclase gene expression in detached pepper leaves was induced by 0.5～4mmol·L^-1 of exongenous SA,whereas the enzyme activity and accumulation of cyclase mRNAwere much lower,and it took a longer time (36h) for the gene to be induced to express after SAtreatment,comparing to other elicitors such as UVand fungi treatment.The activities of SODand PODwere enhanced,while the CATactivity was inhibited to some degree. Consequently,H₂O₂ content was increased in SAtreated pepper leaves.H₂O₂ accumulation was related to the integrated influences from antioxidant enzymes.

Key words: Capsicum annum, Sesquiterpene cyclase, Salicylic acid, Antioxidant enzymes, Rhodiola gannanica, endangered, reproductive ecology.

CLC Number:

Q786
S641.3

HE Shuilin, LIN Wenxiong, CHEN Rukai . Induction of sesquiterpene cyclase gene expression and antioxidant enzyems regulated by exongenous salicylic acid in leaves of Capsicum annuum[J]. Chinese Journal of Applied Ecology, 2002, (5): 569-572.

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