Hexanoic acid 2-(diethylamino)ethyl ester enhances chilling tolerance in strawberry seedlings by impact on photosynthesis and antioxidants
2011
Fu, X.J., China Agricultural Univ., Beijing (China). Coll. of Agriculture and Biotechnology | Maimaiti, A.S., China Agricultural Univ., Beijing (China). Coll. of Agriculture and Biotechnology | Mou, H.M., China Agricultural Univ., Beijing (China). Coll. of Agriculture and Biotechnology | Yang, Q., China Agricultural Univ., Beijing (China). Coll. of Agriculture and Biotechnology | Liu, G.J., China Agricultural Univ., Beijing (China). Coll. of Agriculture and Biotechnology
Strawberry seedlings were pretreated with hexanoic acid 2-(diethylamino)ethyl ester (DA-6) in concentrations of 0, 10, 20 and 40 mg/cubic dm and then subjected to chilling and rewarming. The effects of applied DA-6 on the generation of reactive oxygen species (O2-, H2O2), lipid peroxidation, proline accumulation and photosynthesis were evaluated. Pretreatment with DA-6 alleviated the inhibition of superoxide dismutase, catalase and ascorbate peroxidase activities caused by chilling stress thus reducing O2- and H2O2 production and lipid peroxidation in pretreated plants. DA-6 pretreatment also accelerated proline accumulation and reduced the decrease in proline content after rewarming. DA-6 pretreatment increased maximum quantum yield of photosystem 2, actual photochemical efficiency of photosystem 2, photochemical quenching coefficient and net photosynthetic rate and decreased non-photochemical quenching coefficient of the seedlings under chilling stress. DA-6 pretreatment also increased the recovery rate of photosynthesis after rewarming.
显示更多 [+] 显示较少 [-]