南京林业大学学报（自然科学版）2024，Vol.48Issue(2)：155-165,11.DOI:10.12302/j.issn.1000-2006.202203017
不同楸树品种对茎腐病的抗性差异研究
Differences in resistance of Catalpa bungei cultivars to stem rot
摘要
Abstract
[Objective]To investigate the differences in resistance to Phytophthora nicotianae(strain QS.1)infestation by Catalpa bungei cultivars and breeding methods,providing basis for C.bungei introduction and cultivation and disease resistance breeding.[Method]The annual seedlings of'Jinsiqiu'(JSQ),'Qiuza 1 hao'(QZ),'Yuqiu 1 hao'(YQ),'Luoqiu 1 hao'(LQ-Z)tissue cultured seedlings,and cutting seedling'Luoqiu 1 hao'(LQ-Q),'Qiu5-8'(Q5-8),'Qiu 8-1'(Q8-1),six C.bungei cultivars were used as experimental materials and infested with P.nicotianae strain QS.1 to determine relevant osmotic substance content,protective enzyme activity and photosynthetic gas parameters.[Result]After infection 2-4 d by strain QS.1,all C.bungei cultivars tested were susceptible to the disease and in the case of seedlings'Qiuza 1 hao'and'Yuqiu 1 hao'had the weakest resistance to the disease caused by the strain QS.1,while'Jinsiqiu'had the strongest resistance to the disease;as far as the cuttings of C.bungei cultivars were concerned,Q5-8 and Q8-1 were more resistant to the infection of strain QS.1;'Luoqiu 1 hao'cuttings were more resistant to the disease than the histoculture seedlings,and the cuttings of other species had stronger resistance to QS.1 infection than the histoculture seedlings,except for'JSQ'.[Conclusion]There were differences in infection pathogenesis among different C.bungei cultivars after inoculation.The pathogenic ability of different C.bungei cultivars against P.nicotianae strain QS.1 is related to the maintenance of photosynthetic performance and the regulation of defense-related enzyme activities.关键词
楸树品种/烟草疫霉(菌株QS.1)/抗性差异/生理指标/繁殖方式Key words
Catalpa bungei cultivars/Phtophthora nicotianae(strain QS.1)/resistance difference/physiological index/propagation method分类
农业科技引用本文复制引用
祝艳艳,贾瑞瑞,付钰,常林,岳远征,杨秀莲,王良桂..不同楸树品种对茎腐病的抗性差异研究[J].南京林业大学学报（自然科学版）,2024,48(2):155-165,11.基金项目
江苏省农业科技自主创新资金项目(CX(19)2038) （CX(19）
江苏省林业科技创新与推广项目(LYKJ(20019)05). （LYKJ(20019）
