草地学报

草地学报 ›› 2014, Vol. 22 ›› Issue (3): 661-664.DOI: 10.11733/j.issn.1007-0435.2014.03.034

• 研究专报 • 上一篇    下一篇

竹节草对NaCl胁迫临界浓度的初步研究

张静1,2, 廖丽2, 白昌军3, 王志勇1   

  1. 1. 海南大学热带作物种质资源保护与开发利用教育部重点实验室, 海南 海口 570228;
    2. 海南大学农学院, 海南 海口 570228;
    3. 中国热带农业科学院热带作物品种资源研究所热带牧草研究中心, 海南 儋州 571737
  • 收稿日期:2013-08-28 修回日期:2013-11-02 发布日期:2014-06-04
  • 通讯作者: 王志勇
  • 作者简介:张静（1991- ），女，安徽淮北人，学士，研究方向为草坪植物种质资源与逆境生理，E-mail：1073346680@qq.com；
  • 基金资助:

    国家自然科学基金项目（31260489）；海南省教育厅高等学校科研研究项目（Hjkj2013-10）资助

Critical Concentration of Salt Stress in Chrysopogon aciculatus

ZHANG Jing1,2, LIAO Li2, BAI Chang-jun3, WANG Zhi-yong1   

  1. 1. Key Laboratory of Protection and Developmental Utilization of Tropical Crop Germplasm Resources of Hainan University, Ministry of Education, Haikou, Hainan Province 570228, China;
    2. College of Agronomy, Hainan University, Haikou, Hainan Province 570228, China;
    3. Tropical Pasture Research Center CATAS, Danzhou, Hainan Province 571737, China
  • Received:2013-08-28 Revised:2013-11-02 Published:2014-06-04

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摘要：

以竹节草（ Chrysopogon aciculatus）为材料，通过水培法初步研究了不同NaCl浓度对其叶色、坪用质量和叶片枯黄率的影响，以期筛选出竹节草对NaCl胁迫的半致死浓度。结果表明：不同处理之间存在显著（P<0.05）或极显著（P<0.01）差异，随着盐浓度的提高（0~315 mmol·L-1），叶色和坪用质量呈现下降趋势，而叶片枯黄率则呈现上升趋势。通过建立回归方程，确定竹节草存活的临界NaCl浓度是以叶片枯黄率50%作为标准，可得竹节草具有50%存活的临界NaCl浓度为207 mmol·L-1，结果可为后期筛选耐盐性竹节草品种提供依据。

关键词: 竹节草, NaCl胁迫, 临界浓度

Abstract:

The salt tolerance of Chrysopogon aciculatus was evaluated by hydroponics experiment to screen the critical concentration of salt stress. The leaf color, turf quality and leaf firing percentage of carpet grass were examined by hydroponics experiment with different salt concentrations. Results showed that there were significant (P<0.05) or very significant (P<0.01) differences among different treatments. The scores of leaf color and turf quality decreased with the increase of salt concentration (0~315 mmol·L-1), while the percentage of leaf firing increased. The 50% of leaf firing was taken as an index to determine the critical concentration of salt stress by regression equation. The lethal salt concentration of carpet grass was 207 mmol·L-1. These results provided the basis for screening the salt-resistantvariety of Chrysopogon aciculatus.

Key words: Chrysopogon aciculatus, Salt stress, Critical salt concentration

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