外源甜菜碱对NaCl胁迫下大红三角梅生理特性的影响  

The influence of exogenous glycine betaine on the physiological characteristics of Bougainvillea spectabilis‘Crimsonlake’under NaCl stress

作　　者：胡若群 杨卓生 王舟帆 郑庆华 游永彬 解叶龙 兰坤霖 陈莹[1] HU Ruo-qun;YANG Zhuo-sheng;WANG Zhou-fan;ZHENG Qing-hua;YOU Yong-bin;XIE Ye-long;LAN Kun-lin;CHEN Ying(College of Landscape Architecture and Art,Fujian Agriculture and Forestry University,Fuzhou350100,China;Zhongmin Mingtai Group Co.,Ltd.,Xiamen361006,Fujian,China;Xintai Construction Group Co.,Ltd.,Xiamen361001,Fujian,China;Fujian Zhongmin City Investment Construction Engineering Co.,Ltd.,Nanping350799,Fujian,China;Jinshan College of Fujian Agriculture and Forestry University,Fuzhou350002,China)

机构地区：[1]福建农林大学风景园林与艺术学院,福州350100 [2]中闽铭泰集团有限公司,福建厦门361006 [3]鑫泰建设集团有限公司,福建厦门361001 [4]福建中闽城投建筑工程有限公司,福建南平350799 [5]福建农林大学金山学院,福州350002

出　　处：《湖北农业科学》2025年第3期86-91,99,共7页Hubei 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-198)。

摘　　要：为了探究外源甜菜碱对NaCl胁迫下三角梅生理特性的影响以及其最佳缓解浓度,以二年生大红三角梅(Bougainvillea spectabilis‘Crimsonlake’)盆栽苗为试验材料,用200 mmol/L NaCl模拟盐胁迫后,分别施加50、100、150 mmol/L的外源甜菜碱(T1、T2、T3),以NaCl胁迫后清水养护(CK)作为对照,测定不同处理对三角梅叶片相对电导率、丙二醛、脯氨酸以及SOD、POD、CAT活性的影响,并对不同浓度甜菜碱缓解NaCl胁迫的能力进行综合评价。结果表明,NaCl胁迫后施加外源甜菜碱,叶片相对电导率、丙二醛含量显著降低,脯氨酸含量以及POD、SOD、CAT活性明显提高,表明外源甜菜碱能够有效缓解NaCl胁迫对三角梅的伤害。通过主成分分析与隶属函数分析得出,施加100 mmol/L外源甜菜碱对NaCl胁迫后大红三角梅缓解作用最佳。To investigate the impact of exogenous betaine on the physiological characteristics of Bougainvillea spectabilis under NaCl stress and to determine its optimal alleviating concentration,two-year-old potted Bougainvillea spectabilis‘Crimsonlake’were used as experimental materials,after simulating salt stress with a 200 mmol/L NaCl solution,exogenous glycine betaine was applied at concentrations of 50,100,and 150 mmol/L(T1,T2,T3),with water maintenance after NaCl stress(CK)serving as the control group.The effects of different treatments on leaf relative conductivity,malondialdehyde(MDA),proline,and the activities of superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)were determined,and the alleviating capacity of betaine at different concentrations against NaCl stress was comprehensively evaluated.The results showed that the application of exogenous glycine betaine after NaCl stress significantly reduced leaf relative conductivity and MDA content,while obviously increasing proline and the activities of POD,SOD,and CAT,indicating that exogenous glycine betaine could effectively alleviate the damage of NaCl stress to Bougainvillea spectabilis‘Crimsonlake’.Principal component analysis and fuzzy function analysis revealed that the application of 100 mmol/L exogenous glycine betaine was the most effective in alleviating the stress of NaCl on Bougainvillea spectabilis‘Crimsonlake’.

关 键 词：大红三角梅(Bougainvillea spectabilis‘Crimsonlake’) NACL胁迫 甜菜碱 渗透调节 抗氧化酶活性 

分 类 号：S685.99[农业科学—观赏园艺] Q945.78[农业科学—园艺学]