摘要
以2 a龄大红三角梅盆栽为研究对象,以水淹胁迫后正常管理为对照组,设置不同浓度氯化钙对水淹胁迫后的三角梅进行灌溉处理,测定与光合作用、抗氧化酶活性、渗透调节物质等相关的10项指标,并结合主成分分析和隶属函数分析,探讨外源氯化钙对水淹胁迫后三角梅生理特性的影响及其最佳缓解浓度。结果表明:外源氯化钙处理显著提高了三角梅叶片的净光合速率、蒸腾速率、胞间CO_(2)浓度及气孔导度;能显著降低相对电导率和丙二醛含量,同时提高了3种抗氧化酶(SOD、POD、CAT)的活性和可溶性蛋白含量,表明外源氯化钙在一定程度上缓解了水淹胁迫对三角梅的损害。通过主成分分析和隶属函数分析得出不同浓度氯化钙的缓解效果排序:20 mmol/L>30 mmol/L>10 mmol/L。
The two-year-old potted Bougainvillea spectabilis’Crimsonlake’was taken as the research subject,and normal management after waterlogging was taken as the control group.Different concentrations of calcium chloride were used to irrigate B.spectabilis’Crimsonlake’after waterlogging.Ten indicators related to photosynthesis,antioxidant enzyme activity,and osmotic adjustment substances,etc.were measured.Principal component analysis and membership function analysis were performed to explore the effects of exogenous calcium chloride on the physiological characteristics of B.spectabilis’Crimsonlake’after waterlogging and the optimal concentration of calcium chloride for alleviating waterlogging stress.The results showed that different concentrations of calcium chloride significantly improved the net photosynthetic rate,transpiration rate,intercellular CO_(2) concentration,and stomatal conductance of leaves.In addition,calcium chloride significantly reduced the relative conductivity and malondialdehyde content,while increasing the activities of three antioxidant enzymes[superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)]and the content of soluble protein.The results indicated that exogenous calcium chloride to some extent alleviated the damage of waterlogging stress to B.spectabilis’Crimsonlake’.The principal component analysis and membership function analysis suggested that the alleviating effects of calcium chloride at different concentrations were in the order of 20 mmol/L>30 mmol/L>10 mmol/L.
作者
胡若群
曹佳玉
连红平
杨卓生
郑庆华
游永彬
刘超
陈莹
HU Ruo-qun;CAO Jia-yu;LIAN Hong-ping;YANG Zhuo-sheng;ZHENG Qing-hua;YOU Yong-bin;LIU Chao;CHEN Ying(College of Landscape Architecture and Art,Fujian Agriculture and Forestry University,Fuzhou 350002,PRC;Zhongmin Mingtai Group Co.,Ltd.,Xiamen 361006,PRC;Xintai Construction Group Co.,Ltd.,Xiamen 361001,PRC;Yancheng Construction Group Co.,Ltd.,Xiamen 361009,PRC)
出处
《湖南农业科学》
2025年第4期80-86,共7页
Hunan Agricultural Sciences
基金
福建省住房和城乡建设厅科技研究开发计划项目(2022-K-200)。
关键词
水淹胁迫
大红三角梅
氯化钙
生理特性
waterlogging stress
Bougainvillea spectabilis’Crimsonlake’
calcium chloride
physiological characteristics
