ABA enhanced cold tolerance of wheat 'dn1' via increasing ROS scavenging system.

ABSTRACT: Abscisic acid (ABA) is an important plant hormone that plays significant roles in cold tolerance regulation. However, whether ABAimproves cold tolerance by increasing the activities of antioxidant enzymes in wheat remains unknown. In this study,the activities of antioxidant enzymes of the winter wheat variety 'dongnongdongmai 1' ('dn1')afterthe application of exogenous ABA under low temperature (0°C, -10°C, -20°C, and -25°C) were investigated. Results showed that cold stress significantly increased H₂O₂ and relative conductivity, whileABA significantly reduced this effect. ABA enhanced cold tolerance in both leaves and rhizomes at -10°C and -20 °Cby increasing CAT, SOD, POD, APX, GR, DHAR, and MDHAR. However, this tolerance was weakenedat -25°C with decr

SUBMITTER: Yu J 

PROVIDER: S-EPMC8570709 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature