西南林业大学学报2024，Vol.44Issue(5)：18-26,9.DOI:10.11929/j.swfu.202305056
'娇红1号'红花玉兰对水分胁迫的生理响应
Physiological Response of Magnolia wufengensis'Jiaohong 1'to Water Stress
摘要
Abstract
One-year-old grafted seedlings of Magnolia wufengensis'Jiaohong 1'were used as test materials.The potting soil water content was set as 20％(HD),40％(LD),60％(CK),80％(LF),100％(HF)of the maximum field water capacity(FWC),and the photosynthetic characteristics and physiological indexes of'Jiaohong No.1'leaves were measured under different treatment conditions.The results showed that:under water stress,all the'Jiaohong 1'seedlings under HD treatment died on the 10th day of stress(the survival rate of the rest was 100％),the chlorophyll content of the'Jiaohong 1'leaves in the CK treatment group decreased first and then increased,and the rest treatments decreased with the extension of stress time.The diurnal variation of Pn and Gs showed a double peak phenomenon,the diurnal variation of Tr showed an upward trend and then a downward trend,the di-urnal variation of Ci showed an upward trend,and that of WUE and Ls showed a downward trend.The daily mean values of Pn,Gs,Ci and Tr under CK treatment were the largest,while those of WUE and Ls under HF treatment were the largest.With the extension of stress time,the contents of soluble sugar,soluble protein and MDA in the leaves of'Jiaohong l'seedlings increased first and then decreased.The content of Pro and activity of SOD showed an upward trend.The activity of APX decreased first,then increased and then decreased,and the activity of APX was the lowest under CK treatment when the stress was maintained to the 40th day.In the study,60％～80％FWC is the best condition for the growth of Magnolia wufengensis'Jiaohong 1'.关键词
红花玉兰/水分胁迫/光合特性/生理指标/抗逆性Key words
Magnolia wufengensis/water stress/photosynthetic characteristics/physiological index/stress resistance分类
农业科技引用本文复制引用
詹丽红,汪加魏,蔡宇宇,朱仲龙,马履一,贾忠奎,吴南生,罗芊芊,朱国平,邓章文..'娇红1号'红花玉兰对水分胁迫的生理响应[J].西南林业大学学报,2024,44(5):18-26,9.基金项目
中央财政林业科技推广示范资金补助项目(JXTG[2021]20号)资助. （JXTG[2021]20号）
