摘要
为探索大豆耐旱性生理机制,筛选适宜科尔沁沙地种植的抗旱型大豆品种,采用称重法人工控水、旱棚盆栽方式,结合抗旱变化率、主成分分析、隶属函数综合抗旱性分析方法,研究干旱胁迫对7份大豆开花期的生理生化指标、农艺性状的影响。结果表明,与对照相比,干旱胁迫下各品种单株粒重、单株荚皮重和根瘤数显著降低,而叶片可溶性糖、游离氨基酸含量增加,丙二醛含量和相对电导率则显著增加,其中,黑农44和四粒黄丙二醛的含量均高于其他品种,变化率分别为1.12和1.00,吉育86变化率最低,仅为0.07;相对电导率值以黑农44最高,四粒黄最低;叶绿素含量也呈增加趋势,其中以四粒黄变化幅度最大;平均隶属函数值以四粒黄最高,其次是绥农28,二者都具有较强的耐旱性,而吉育86和晋豆40为干旱敏感品种。主成分分析表明,可以用叶绿素含量、单株粒重和根瘤数3个指标作为大豆耐旱性评价的重要指标。
To explore the physiological mechanism of soybean drought resistance and screen suitable drought-resistant soybean varieties in Horqin area, the effects of drought stress on physiological and biochemical indexes and agronomic traits of seven soybean cultivars at flowering stage were studied by weighing artificial water and pot cultivation in drought shed, combined with change rate of drought resistance, principal component analysis and comprehensive drought resistance analysis of subordinate function.The results showed that grain weight per plant, pod skin weight per plant and nodule number were significantly decreased compared with the control, while the content of soluble sugar and free amino acid increased, and malondialdehyde content and relative electrical conductivity were significantly increased. Among them, the malondialdehyde content of Heinong 44 and Sihuang was higher than that of other varieties, and the change rate was 1.12 and 1.00,respectively.Jiyu 86 had the lowest change rate, which was only 0.07.The relative conductivity of Heinong 44 was the highest and that of Sihuang was the lowest.And, the chlorophyll content also showed an increasing trend, and the variation range was the largest in four seeds.The average membership function value of Sihuang was the highest, followed by Suinong 28,both of which had strong drought tolerance, while Jiyu 86 and Jindou 40 were drought-sensitive varieties.Principal component analysis showed that chlorophyll content, grain weight per plant and nodule number could be used as important indexes for evaluating drought tolerance of soybean.
作者
于华荣
郭园
曹帅
向殿军
刘鹏
李志刚
YU Huarong;GUO Yuan;CAO Shuai;XIANG Dianjun;LIU Peng;LI Zhigang(College of Agriculture,Inner Mongolia University for Nationalities,Tongliao Inner mongolia 028000,China)
出处
《种子》
北大核心
2021年第12期68-74,共7页
Seed
基金
内蒙古民族大学科学研究项目(NMDYB 18031)
吉林省农业科学院与内蒙古民族大学合作研究项目共同资助。
关键词
大豆
干旱胁迫
抗旱性
隶属函数
soybean
drought stress
drought resistance
membership function
