摘要
探讨山韭(Allium senescens L.)幼苗的抗旱性,为山韭扩繁、栽培、利用提供材料和理论依据。在盆栽条件下,通过自然干燥和称重控水的方法对山韭幼苗进行干旱胁迫,于胁迫的第20d取样测定叶片组织相对含水量(RWC)、细胞质膜透性(EL)、丙二醛(MDA)含量、脯氨酸(Pro)含量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、可溶性蛋白质(Pro)含量、单位鲜重叶绿素含量(Chl)、株高和地上生物量等一系列指标的变化。结果表明:(1)通过比较其他植物株高和地上生物量受干旱胁迫影响程度的大小,说明山韭具有较强的抗旱性,在重度干旱胁迫下,山韭的株高和地上生物量比对照降低了25.11%和44.62%。(2)山韭幼苗在一定程度(中度)的干旱胁迫范围可以通过增加叶绿素含量来增强其对干旱胁迫的适应能力,而脯氨酸在各干旱胁迫下对山韭幼苗均起着重要的保护作用,由超氧化物歧化酶清除体内多余的自由氧。
In order to provide the materials and a theoretical basis for drought-resistant breeding,cultivation and utilization,the ability of drought resistance at seedling stage of rapeseed Allium senescens L.was investigated.Under the condition of potted planting,the method of water control in natural drying and weighing the seedling of A.senescens.The change of leaf relative water content,cytoplasmic membrane permeability,malondialdehyde,proline,superoxide dismutase,peroxidase,soluble protein,chlorophyll content,plant height and biomass measured and analysis after 20 d’s growth.The result showed that:(1)By comparing the plant height and above-ground biomass of other plants with the degree of drought stress,it can be concluded that Hawthorn has strong drought resistance,Under severe drought stress,the plant height and above-ground biomass of Hawthorn decreased by 25.11%and 44.62%compared to the control.(2)Hawthorn seedlings can increase their ability to adapt to drought stress by increasing the content of chlorophyll in a certain degree(moderate)drought stress range,and proline plays an important role in hawthorn seedlings under drought stress.Protects against excess free oxygen in the body by superoxide dismutase.
作者
姜杰
马瑞鑫
徐聪
刘扬
刘忠宽
刘桂霞
Jiang Jie;Ma Ruixin;Xu Cong;Liu Yang;Liu Zhongkuan;Liu Guixia(College of Life Science,Hebei University,Baoding 071002,China;Tianjin LVYIN Landscape and Ecology Construction Co.,Ltd,Tianjin 300380,China;College of Life Science,Qingdao Agriculture University,Qingdao 266109,China;Institute of Agro-resources and Enviroment,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang 050051,China)
出处
《草学》
2020年第6期30-39,共10页
Journal of Grassland and Forage Science
基金
河北省自然科学基金(C2015201136)
河北省重点研发计划项目农业关键共性技术攻关专项(18227530D)
河北省现代农业产业体系草业创新团队项目(HBCT2018050204)
中西部高校提升综合实力工程项目资助(植物多样性及资源利用)和生物学强势特色学科资助(植物学)
耐盐碱景观植物选育与节水建植技术体系集成(17YDLJNC00120)资助。
关键词
山韭
抗旱性
干旱胁迫
生理响应
Allium senescens L.
drought resistance
drought stress
physiological response
