8份多叶羽扇豆种质幼苗对干旱胁迫的生理响应及抗旱性评价  

Evaluation of physiological response and drought resistance of seedlings of eight Lupinus polyphyllus accessions to drought stress

作　　者：柴澍杰 吴一鸣 赵鑫龙 井招娣 余双根 戴海根 马晖玲[1] CHAI Shu-jie;WU Yi-ming;ZHAO Xin-long;JING Zhao-di;YU Shuang-gen;DAI Hai-gen;MA Hui-ling(College of Grassland Science,Gansu Agricultural University,Key Laboratory of Grassland Ecosystem,Ministry of Education/Pratacultural Engineering Laboratory of Gansu Province/Sino-US Centers for Grazingland Ecosystem Sustainability,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,中‐美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2023年第1期137-143,共7页Grassland and Turf

摘　　要：【目的】探究干旱胁迫对不同多叶羽扇豆种质叶片的生理特性影响。【方法】以8份多年生多叶羽扇豆种质作为试验材料,以30%的PEG‐6000溶液模拟干旱胁迫,测定干旱胁迫后8份多叶羽扇豆种质的生理指标。【结果】冰岛种质相对抗旱性较强,渗透调节物质含量较高,MDA含量相对较低,活性氧积累量趋于低水平,抗氧化酶活性最高;美国B种质相对抗旱性较弱,渗透调节物质含量最低,MDA含量最高,活性氧积累量最高,抗氧化酶活性趋于最低水平。【结论】采用隶属函数方法综合评价表明,多叶羽扇豆的抗旱能力排序为:冰岛>美国A>江苏>德国>临夏>陕西>酒泉>美国B。本研究结果为多叶羽扇豆的种植推广提供理了论依据。【Objective】To explore the effects of drought stress on physiological characteristics of leaves of different lupine germplasm.【Method】Eight Lupinus polyphyllus lindl germplasm were used as experimental materials,and 30%PEG‐6000 solution was used to simulate drought stress,and the physiological indexes of eight germplasm were compared after drought stress.【Result】The results showed that the germplasm with higher relative drought resistance had higher content of osmotic regulatory substances,lower content of MDA,lower accumulation of reactive oxygen species,and the higher activity of antioxidant enzymes than those of the relative weak drought resistance germ‐plasm.By contrast,the germplasm with relatively weak drought resistance had the lowest content of osmotic regulatory substances,the highest content of MDA,the highest accumulation of reactive oxygen species and the lowest activity of antioxidant enzymes.【Conclusion】The results of the membership function method showed that the drought resistance of Lupinus polyphyllus lindl was ranked as′Iceland′>′America B′>′Jiangsu′>′Germany′>′linxia′>′Shanxi′>′Jiuquan′>′America B′.The results of this study provide a theoretical basis for the cultivation and promotion of Lupinus polyphyllus lindl.

关 键 词：多叶羽扇豆 干旱胁迫 生理响应 隶属函数法 抗旱性评价 

分 类 号：S682[农业科学—观赏园艺]