草地学报

草地学报 ›› 2015, Vol. 23 ›› Issue (2): 352-357.DOI: 10.11733/j.issn.1007-0435.2015.02.020

• 研究论文 • 上一篇    下一篇

中性盐胁迫对柳枝稷苗期生长和生理特性的影响

朱毅1, 范希峰1, 侯新村1, 刘吉利2, 李钰莹1, 武菊英1   

  1. 1. 北京市农林科学院北京草业与环境研究发展中心 农业部都市农业(北方)重点实验室, 北京 100097;
    2. 宁夏大学新技术应用研究开发中心, 宁夏 银川 750021
  • 收稿日期:2014-04-02 修回日期:2014-06-16 出版日期:2015-04-15 发布日期:2015-03-25
  • 通讯作者: 范希峰
  • 作者简介:朱毅(1984-),男,河南周口人,博士,研究方向为能源作物抗逆生理和品质调控,E-mail:zydahaoren110@163.com
  • 基金资助:

    国家自然科学基金(31101103);北京市农林科学院科技创新能力建设专项“草资源新功能”(KJCX201201001);北京市农林科学院青年科研基金(QNJJ201219)资助

Effects of Neutral Salt-stress on the Seedling Growth and Physiological Characteristics of Switchgrass

ZHU Yi1, FAN Xi-feng1, HOU Xin-cun1, LIU Ji-li2, LI Yu-ying1, WU Ju-ying1   

  1. 1. Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Key Laboratory of Urban Agriculture (North), Ministry of Agriculture, Beijing 100097, China;
    2. New Technology Application Research and Development Center, Ningxia University, Yinchuan, Ningxia 750021, China
  • Received:2014-04-02 Revised:2014-06-16 Online:2015-04-15 Published:2015-03-25

PDF

摘要：

为研究柳枝稷(Panicum virgatum)耐盐程度及其在盐胁迫处理下的生理和生长反应,选用2个柳枝稷品种‘Alamo’和‘Pathfinder’,采用3种中性盐(单盐NaCl, Na2SO4以及混合中性盐NaCl+Na2SO4),设0(CK), 50, 100, 200和300 mmol·L-15个盐浓度,分别对柳枝稷进行胁迫处理,测定胁迫7 d的叶绿素含量、质膜透性、可溶性糖和可溶性蛋白,以及胁迫30 d的株高、分蘖、总根长、总根表面积、地上部和地下部干重.结果显示:低浓度(100 mmol·L-1)盐胁迫条件下,2品种柳枝稷均能从生理和生长等方面表现出积极适应胁迫生境的趋势;随着盐浓度的增加,2品种柳枝稷的生长和生理受到显著抑制,但2品种的柳枝稷对不同的盐分表现出的耐盐能力不尽相同.3种中性盐中,Na2SO4对柳枝稷的胁迫程度大于NaCl和混合中性盐.

关键词: 中性盐胁迫, 柳枝稷, 生长, 生理特性

Abstract:

Two switchgrass cultivars were investigated to reveal the effects of salt stress on the physiological and growth indexes of Panicum virgatum. The salt tolerance, physiological and growth responses of Alamo and Pathfinder cultivars cultured in Hoagland solution supplied with NaCl, Na2SO4 and mixed neutral salt (NaCl:Na2SO4=1:1) at the concentrations of 0, 50, 100, 200 and 300 mmol·L-1 were studied in seedling stage. Physiological indexes (chlorophyll content, permeability of plasmas membrane, soluble sugar and soluble protein) were measured after salt stress for 7 days and so were growth indicators (height, tiller number, total root length, total root surface area, dry weight of shoot and root) after 30 days. The results showed that both cultivars actively adapted to the condition of low concentration (<100 mmol·L-1) compared with the control. The growth and physiology of both cultivars were inhibited with increasing salt concentration. Height, tiller number, dry matter and chlorophyll content decreased with the gradient enhancement of salinity concentration; whereas the permeability of plasmas membrane, soluble sugar and soluble protein increased with the gradient enhancement of salinity concentration; total root length and surface area were also restrained. Integrated analysis implied that the Na2SO4 stress exerted stronger inhibitory influence on switchgrass than the NaCl and mixed neutral salt stress.

Key words: Neutral salt-stress, Switchgrass, Growth, Physiological characteristics

中图分类号: