摘要
【目的】研究CO2浓度升高和UV-B辐射增强综合作用对小麦条锈病流行组分的影响,预测未来气候条件下小麦条锈病的发生情况,为防治工作提供依据。【方法】以人工接种条锈病菌32号生理小种的不同小麦品种(铭贤169、京9428、京0045和京冬8号)为供试材料,对其进行浓度升高的CO2和辐射增强的UV-B处理,分析二者对病害流行组分的影响。【结果】高CO2浓度下,在铭贤169、京9428和京0045上,小麦条锈菌的侵染概率显著提高,病害的潜育期缩短,病斑扩展量增加,AUDPC值显著增加。UV-B辐射对侵染概率、潜育期、病斑扩展和AUDPC的影响不显著。在CO2浓度升高与UV-B辐射增强的综合作用下,4个品种上的小麦条锈病的流行组分与对照相比无显著变化。【结论】CO2浓度升高能加重小麦条锈病的发生和危害,UV-B辐射对病害影响不大,CO2浓度升高与UV-B辐射增强两者综合作用对病害几乎没有影响。
【Objective】The objective of this research is to investigate the effects of elevated CO2 concentration and enhanced UV-B radiation on epidemic components of wheat stripe rust in climate chamber and to provide a basis for the prediction and control of the disease in future climate conditions.【Method】 Different wheat cultivars were used as materials including Mingxian 169,Jing 9428,Jing 0045 and Jingdong 8 in this experiment.The wheat seedlings were inoculated with CYR32,one of the physiological races of the pathogen.Four treatments including elevated CO2 and enhanced UV-B radiation were conducted to find out the effects of CO2 and UV-B radiation on epidemic components of wheat stripe rust.【Result】Under high CO2 concentration conditions,the infection efficiency of wheat stripe rust on Mingxian 169,Jing 9428 and Jing 0045 was significantly increased,latent period was shortened,and lesion expansion was increased.Enhanced UV-B radiation had no significant effect on the disease epidemic components.Under the interaction of CO2 concentration and UV-B radiation,the changes of epidemic components of wheat stripe rust on the four cultivars were not significant compared with the control.【Conclusion】Elevated CO2 concentration could increase the occurrence of wheat stripe rust.However,enhanced UV-B radiation could not affect the disease significantly.The comprehensive action of elevated CO2 concentration and enhanced UV-B radiation barely had any effect on the disease.
出处
《中国农业科学》
CAS
CSCD
北大核心
2011年第20期4326-4332,共7页
Scientia Agricultura Sinica
基金
国家公益性行业(农业)科研专项(200903035
200903004)
