摘要
以1年生杂交新美柳扦插苗为材料,采用盆栽模拟淹水加外源6−BA处理,测定不同时期植株生物量、叶片SP含量、MDA含量以及SOD活性和POD活性,分析其对淹水胁迫和外源6−BA的生理响应。结果表明:淹水胁迫下叶片SP含量呈下降趋势并降低了光合产物积累,抗氧化酶活性先升后降,MDA含量在45 d时大幅增加;外源6−BA对胁迫下植株光合产物积累和保护酶系统具有显著影响。1年生杂交新美柳表现出较强耐涝性,前中期喷施30 mg/L浓度的6−BA对提高光合产物积累和增强叶片保护酶系统具有显著作用。
The biomass,leaf SP content,MDA content,SOD activity,and POD activity of plants at different stages were measured to analyze their physiological responses to flooding stress and exogenous 6-BA by simulating flooding with exogenous 6-BA treatment in pots using annual Salix matsudana×alba cuttings as the material.The findings indicated that the SP content of leaves under flooding stress showed a decreasing trend and reduced photosynthetic product accumulation,the antioxidant enzyme activity increased and then decreased,and the MDA content increased significantly at 45 d.Exogenous 6-BA had a significant effect on photosynthetic product accumulation and protective enzyme system of plants under stress.The study showed that the annual Salix hybrid showed strong tolerance to flooding,and the spraying of 6-BA at a concentration of 30 mg/L in the first and middle stages had a significant effect on improving photosynthetic product accumulation and enhancing the leaf protective enzyme system.
作者
任佳辉
高捍东
陈哲楠
李浩
刘强
陈澎军
Ren Jiahui;Gao Handong;Chen Zhenan;Li Hao;Liu Qiang;Chen Pengjun(College of Forestry,Nanjing Forestry University/Southern Tree Seed Inspection Center,National Forestry and Grassland Administration/Co-Innovation Center for the Sustainable Forestry in Southern China,Nanjing Jiangsu 210037,China;Institute of Geochemical Exploration and Marine Geological Survey,Nanjing Jiangsu 210007,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2024年第2期11-19,共9页
Journal of Southwest Forestry University：Natural Sciences
基金
江苏省自然资源发展专项资金项目(JSZRHYKJ202108)资助。
关键词
杂交新美柳
淹水胁迫
6−BA
保护酶系统
冗余分析
Salix matsudana×alba
waterlogging stress
6-BA
protective enzyme system
redundancy analysis
