豌豆苗采后GA、乙烯和ABA处理对纤维合成的调控作用

Regulations of Fiber Synthesis in Excised Pea Seedlings by Gibberellic Acid,Ethylene and Abscisic Acid

研究了GA、乙烯和ABA对离体豌豆苗 (PisumsativumL .)纤维合成的调控作用。结果表明 ,豌豆苗采后组织中纤维含量逐渐上升 ,与纤维合成相关的酶类包括苯丙氨酸解氨酶 (PAL)、多酚氧化酶(PPO)、肉桂醇脱氢酶 (CAD)和过氧化物酶 (POD)活性均显著增强。GA处理对豌豆苗采后纤维合成有明显抑制作用 ,同时显著地抑制了肉桂醇脱氢酶 (CAD)活性的上升。乙烯和ABA处理促进豌豆苗采后纤维合成 ,并提高了PAL、PPO、CAD和POD的活性。

To learn how the fiber-synthesis regulated by plant growth regulators,excised pea seedlings (Pisum sativum L.) were treated with gibberellic acid (GA),ethylene or abscisic acid (ABA).The fiber level in the seedlings gradually increased after harvest and it was further enhanced by ethylene or ABA,and reduced by GA,whereas,activities of related enzymes (phenylalanine deaminase,polyphenol oxidase,cinnamyl alcohol dehydrogenase and peroxidase) in the seedlings were enhanced by treatment with ethylene or ABA,However cinnamyl alcohol dehydrogenase activity was significantly reduced by GA.