摘要
在番茄四叶期用1mg/mL的壳聚糖进行诱导接种,可诱导番茄植株产生对早疫病的抗病性.经壳聚糖诱导后,3个番茄品种:合作908(高抗)、合作903(中抗)、早丰(敏感)的病叶率和病情指数均显著低于接种对照,相对防效分别为39.8%、49.9%和56.4%;壳聚糖诱导番茄的叶片过氧化物酶(POD)、多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)、几丁质酶、β-1,3-葡聚糖酶活性提高,诱导活性在不同抗性品种中表现不同,不同酶的时序变化也有所不同,并探讨了壳聚糖诱导植物抗病性的生理机制.
Resistance to early blight of the tomato plants was induced by chitosan (1 mg/mL) at the fourthleaf stage of seedlings Chitosan treatment of tomato leaves before inoculation reduced the rates of diseased leaf and disease index The relative efficiencies of resistance in cultivars were Hezuo908 (highly resistant), Hezuo903 (moderately resistant), and Zaofeng (least resistant) As a consequence of the treatments, the activities of peroxidase (POD), polyphenol oxidase (PPO), phenylalanine ammonia lyase(PAL), chitinase, and β1,3glucanase in tomato leave increased but in different degrees with different cultivars The time courses of change in enzyme activities following chitosan treatment were also different The mechanism of induced resistance of chitosan was disscussed
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2003年第3期280-286,共7页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
浙江省科技厅重点资助项目(991103335).
