‘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

作　　者：詹丽红 蔡宇宇 朱仲龙[2] 马履一[2] 贾忠奎[2] 吴南生[1] 罗芊芊 朱国平 邓章文 汪加魏 Zhan Lihong;Cai Yuyu;Zhu Zhonglong;Ma Lvyi;Jia Zhongkui;Wu Nansheng;Luo Qianqian;Zhu Guoping;Deng Zhangwen;Wang Jiawei(Forestry College of Jiangxi Agricultural University,Nanchang Jiangxi 330045,China;Laboratory for Silviculture and Conservation,Beijing Forestry University,Beijing 100083,China;Forestry Academy of Fuzhou City,Fuzhou Jiangxi 344114,China)

机构地区：[1]江西农业大学林学院,江西南昌330045 [2]北京林业大学省部共建森林培育与保护重点实验室,北京100083 [3]江西省抚州市林业科学研究所,江西抚州344114

出　　处：《西南林业大学学报（自然科学）》2024年第3期18-26,共9页Journal of Southwest Forestry University：Natural Sciences

基　　金：中央财政林业科技推广示范资金补助项目(JXTG[2021]20号)资助。

摘　　要：以‘娇红1号’1年生嫁接苗为试材,设置盆栽土壤含水量为田间最大持水量(FWC)的20%(HD)、40%(LD)、60%(CK)、80%(LF)、100%(HF)5个处理,测定不同处理条件下‘娇红1号’叶片的光合特性和生理指标分析‘娇红1号’红花玉兰对水分胁迫的生理响应,探究‘娇红1号’红花玉兰在江西等江南丘陵区的引种效应。结果表明:在水分胁迫下,HD处理下的‘娇红1号’苗木在胁迫第10天全部死亡(其余的存活率为100%),CK下‘娇红1号’叶片的叶绿素含量先降后升,其余处理都随着胁迫时间的加长而降低。P_(n)和G_(s)的日变化出现双峰现象,T_(r)日变化呈现先升后降趋势,C_(i)日变化呈现上升趋势,WUE和L_(s)的日变化呈现下降趋势。CK处理的P_(n)、G_(s)、C_(i)和T_(r)日均值最大,HF处理下WUE和L_(s)最大。随着胁迫时间的延长,‘娇红1号’苗木叶片可溶性糖、可溶性蛋白和MDA含量呈现先升后降的变化趋势。Pro含量和SOD活性呈现上升趋势。APX活性呈现先降后升再降的变化趋势,且在胁迫维持到第40天时CK处理下最低。可见,60%~80%FWC的条件下最利于‘娇红1号’红花玉兰的生长。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 P_(n)and G_(s)showed a double peak phenomenon,the diurnal variation of T_(r)showed an upward trend and then a downward trend,the di-urnal variation of C_(i)showed an upward trend,and that of WUE and L_(s)showed a downward trend.The daily mean values of P_(n),G_(s),C_(i)and T_(r)under CK treatment were the largest,while those of WUE and L_(s)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 1'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 

分 类 号：S722[农业科学—林木遗传育种]