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以甜瓜抗病品系MR-1、感病品系M1-15为试材,以甜瓜枯萎菌为供试菌,采用营养钵栽培的方法,研究了水杨酸、茉莉酸甲酯和Ca~(2+)诱导对甜瓜幼苗枯萎病抗性的影响。结果表明:3种外源物质对甜瓜苗期枯萎病抗性的诱导效果不同,其中水杨酸和茉莉酸甲酯效果最好。1.0mmol·L~(-1)水杨酸诱导处理对甜瓜枯萎病的相对防效可达50.7%和45.7%;1.2mmol·L~(-1)茉莉酸甲酯诱导处理对甜瓜枯萎病的相对防效可达66.7%和40.3%,显著高于对照和Ca~(2+)处理;水杨酸、茉莉酸甲酯处理后,甜瓜植株叶片相关防御酶系多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)活性呈上升趋势。
The melon-resistant strain MR-1 and the susceptible strain M1-15 were used as materials to test the effects of salicylic acid, methyl jasmonate and Ca ~ (2) +) On Resistance to Fusarium Wilt of Muskmelon Seedlings. The results showed that three kinds of exogenous substances had different effects on the resistance to Fusarium wilt of melon at seedling stage, of which salicylic acid and methyl jasmonate had the best effect. The relative control effects of 1.0 mmol·L -1 salicylic acid on Fusarium wilt could be up to 50.7% and 45.7%, respectively. Under the induction of 1.2 mmol·L -1 methyl jasmonate, The relative control efficiency was up to 66.7% and 40.3%, respectively, which was significantly higher than that of the control and Ca 2+ treatment. After treatment with salicylic acid and methyl jasmonate, the relative defense enzyme PPO, Phenylalanine ammonia lyase (PAL) activity showed an upward trend.