摘要
为了解6个欧李品种在宁夏苗期的抗旱性差异,为欧李品种引进及耐旱品种筛选和栽培提供科学依据,试验采用自然干旱胁迫处理15、30 d后测定株高,以正常浇水为对照;采用PEG-6000溶液模拟极度干旱环境,测定相同干旱胁迫下农大5号、农大7号、京欧1号、农大4号、宁欧2号、农大6号6个欧李品种幼苗叶片相对含水量、叶绿素SPAD值及其他生理指标,以清水为对照。结果表明,在自然干旱条件下,欧李品种的株高相比正常浇水的对照降幅明显。PEG-6000干旱胁迫下,不同欧李品种与清水对照相比,可溶性蛋白含量、叶片相对含水量、叶片叶绿素SPAD值、SOD活性均呈现下降趋势;而丙二醛含量、脯氨酸含量、可溶性糖含量、POD活性均呈现上升趋势。利用欧李抗旱指标的隶属函数值综合评价得出,欧李品种抗旱性由强到弱排序为农大5号、农大7号、京欧1号、农大4号、宁欧2号、农大6号。农大5号和农大7号的抗旱能力较强,适应性较好,可作为宁夏地区欧李的主要推广品种。
In order to understand the differences in drought resistance at the seedling stage of P.humilis,provide scientific basis for the introduction of P.humilis varieties and the selection and cultivation of drought resistant varieties,in this paper,the plant height was measured after natural drought stress treatment for 15 and 30 days,and normal watering was used as the control.The relative water content,SPAD value,and other physiological indexes of young leaves of six P.humilis varieties including Nondada 5,Nongda 7,Jingou 1,Nongda 4,Ningou 2,and Nonda 6 under the same drought stress were measured by the extremely drought environment simulated by PEG-6000 solution and water was taken as the control.The results showed that under the natural drought conditions,the plant height of the P.humilis varieties decreased significantly compared with that of the control.Under the drought stress of PEG-6000,the soluble protein,relative water content of leaves,relative chlorophyll SPAD value,and SOD activity of different P.humilis varieties showed a downward trend compared with those of the control.The content of malondialdehyde,proline,and soluble sugars,POD activity all showed an upward trend.Using the comprehensive evaluation of the membership function value of the drought resistance index for P.humilis,it was concluded that the drought resistance of P.humilis varieties was ranked from strong to weak as Nongda 5,Nongda 7,Jingou 1,Nongda 4,Ningou 2 and Nongda 6.So,the Nongda 5and Nongda 7 had strong drought resistance and good adaptability,and were suitable to be the main promoted varieties in Ningxia.
作者
何建龙
王占军
柳超超
高嘉瑞
李小明
田英
HE Jianlong;WANG Zhanjun;LIU Chaochao;GAO Jiarui;LI Xiaoming;TIAN Ying(Institute of Forestry and Grassland Ecology,Ningxia Academy of Agricultural and Forestry Sciences,Yinchuan 750002,China;Ningxia Key Laboratory of Desertification Control and Soil and Water Conservation,Yinchuan 750002,China;National Nature Reserve Administration of Ningxia Ha-ba Lake,Yanchi 751500,China)
出处
《山西农业科学》
2024年第3期86-93,共8页
Journal of Shanxi Agricultural Sciences
基金
宁夏回族自治区青年拔尖人才培养工程
宁夏重点研发计划项目(2020BBF02027)。
关键词
欧李
干旱胁迫
抗旱评价
隶属函数法
Prunus humilis
drought stress
drought resistance evaluation
membership function method
