苗木
油菜素内酯
APX公司
交货地点
园艺
脯氨酸
化学
脂质过氧化
超氧化物歧化酶
植物
生物
氧化应激
生物化学
植物生长
氨基酸
作者
Wan ZhengLin,Qi Luo,Li LiZhi
摘要
In the present study,tomato seedlings(with four leaves),grown in pots,were sprayed with different grades of epi-BR concentrations(0,0.01,0.05,0.10,0.50,1.00,1.50 mg / L),twice at two days interval followed by high temperature stress(40℃) for 24h.The MDA,proline contents and relative conductivity in leaves were determined after stress to evaluate suitable epi-BR concentration for inducing resistance to high temperature.The screened epi-BR concentration was sprayed to the leaves of tomato seedlings,and the seedlings were treated with high temperature stress(40℃).The activities of SOD,POD,CAT and APX and the contents of superoxide radical and H2O2 were determined at 0,3,6,12 and 24 h of the stress to study the mechanism of high temperature resistance in tomato seedling.The results showed that the best epi-BR concentration in inducing resistance to high temperature was 0.5 mg / L.Spraying 0.5 mg / L epi-BR could maintain high activities of SOD,POD and APX in leaves under stress,reduce the production and accumulation of active oxygen,reduce the membrane lipid peroxidation,enhance the stabilization of cell membrane and improve the resistance to high temperature in tomato seedlings.
科研通智能强力驱动
Strongly Powered by AbleSci AI