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盐胁迫对大豆种子萌发及矿质元素变化的影响

王永娟1,周妍1,徐明1,徐靖宇1,金晓飞2,石连旋**   

  1. 1东北师范大学生命科学学院, 长春 130024; 2吉林省农作物新品种引育中心, 长春 130062)
  • 出版日期:2015-06-10 发布日期:2015-06-10

Germination parameters and mineral levels in soybean plants under salt stress.

WANG Yong-juan1, ZHOU Yan1, XU Ming1, XU Jing-yu1, JIN Xiao-fei2, SHI Lian-xuan1**   

  1. (1School of Life Sciences, Northeast Normal University, Changchun 130024, China; 2Jilin Center of Germplasm Introduction and Breeding of Crops, Changchun 130063, China)
  • Online:2015-06-10 Published:2015-06-10

摘要:

以大豆为试验材料,测定了中性盐和碱性盐胁迫下大豆种子的萌发、生长参数及各种矿质元素的含量,试图揭示盐胁迫下大豆种子萌发与矿质元素的响应过程及其相互关系。结果表明:大豆种子的萌发率、萌发势、萌发指数及生物量等在高浓度盐胁迫下均呈降低趋势,高浓度碱性盐胁迫比中性盐胁迫下降的趋势更为显著;盐胁迫下,大豆种子萌发过程中矿质元素含量与萌发参数存在显著相关关系。同时,盐胁迫下各种矿质元素在大豆子叶中呈逐渐降低、根中逐渐升高的趋势,造成了大豆体内矿质离子不平衡;尤其是高浓度碱性盐胁迫下,大豆根中矿质元素积累量更大,离子失衡更为显著。研究表明,盐胁迫尤其是高浓度碱性盐胁迫造成了大豆种子中矿质离子大幅度的失衡,对大豆种子的萌发和生长造成严重的伤害。
 

关键词: 化学计量, 氮沉降, 粗放经营, 集约经营, 毛竹

Abstract:

Soybean seeds were germinated under neutral and alkaline salt stress, allowing us to compare germination and growth parameters, mineral levels and the relationship between these factors under each form of stress. The germination rate, germination potential, germination index and biomass were affected by salinity, and the effects were more severe when the salinity was caused by alkaline salts. There was a significant correlation between the germination parameters and mineral levels under salt stress, with mineral elements becoming less concentrated in the cotyledon but more concentrated in the root, resulting in a mineral imbalance. These effects were exacerbated in the presence of alkaline salts. Our data indicated that salt stress, particularly alkaline salt stress, caused a mineral ion imbalance in soybean seedlings, resulting in the inhibition of germination and growth.
 

Key words: Moso bamboo, intensive management., nitrogen deposition, stoichiometry, conventional management