Response of Tall Oatgrass to Salinity Stress at the Seedling Stage

doi:10.11733/j.issn.1007-0435.2011.01.016

›› 2011, Vol. 19 ›› Issue (1): 90-96.DOI: 10.11733/j.issn.1007-0435.2011.01.016

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Response of Tall Oatgrass to Salinity Stress at the Seedling Stage

YAN Hong-wei^1,2, WANG Zan², YANG Xi², WANG Xue-min², GAO Hong-wen²

1. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China;
2. Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing 100193, China

Received:2010-11-10 Revised:2010-12-07 Online:2011-02-15 Published:2011-02-15

高燕麦草苗期对盐胁迫的响应

闫洪唯^1,2, 王赞², 阳曦², 王学敏², 高洪文²

1. 兰州大学草地农业科技学院, 兰州, 730020;
2. 中国农业科学院北京畜牧兽医研究所, 北京, 100193

通讯作者: 高洪文,E-mail:gaohongwen@263.net
作者简介:闫洪唯(1983- ),男,河南鹿邑人,硕士研究生,主要从事牧草种质资源研究,E-mail:yhwgood@163.com;
基金资助:
现代牧草产业技术体系(2060302);中国农业科学院基本科研业务费(2011cj-15);牧草种质资源保护项目(2130135)资助

Abstract

Abstract: This experiment was conducted to evaluate the responses of tall oatgrass plants for salinity stress.Two tall oatgrass genotypes,ZXY03P-367 and ZXY03P-443,were grown for 14 days at greenhouse conditions and treated with four NaCl concentrations(0,65,100,and 135 mM) for 21 days.The plant growth,ion contents,photosynthetic gas exchange,lipid peroxidation,and proline accumulation were measured.Most parameters for the two genotypes were significantly different after treated in 100 and 135 mM NaCl.Salt treatment decreased in root and shoot biomass,photosynthetic rate(A) and stomatal conductance(g_s),and K⁺ content,and increase in Na⁺ content.Larger reductions in the parameters occurred in ZXY03P-443.A significant accumulation of lipid peroxidation and proline in leaves was found during the period of intensive leaf growth.These organic compounds maybe play a role in leaf osmotic adjustment and in protection of membrane stability at severe salinity levels.Our results indicated that the two tall oatgrass genotypes differed in their sensitivity to salinity,with ZXY03P-367 being classified as relatively salt tolerant and ZXY03P-443 as sensitive.

Key words: Tall oatgrass, Seedling, Salinity stress

摘要： 以高燕麦草(Arrhenatherum elatius L.)ZXY03P-367和ZXY03P-443两种基因型为材料,研究其对不同浓度盐胁迫的响应。幼苗生长至三叶期,分别用浓度为0,65,100和135 mM NaCl处理21 d,测定4个盐浓度下的高燕麦草地上、地下生物量、离子含量、光合气体交换、脂质过氧化物、脯氨酸的积累。结果表明:在100和135 mMNaCl条件下,2种基因型高燕麦草大部分参数都存在显著差异(P<0.05)。盐处理导致地上和地下生物量、光合速率(A)、气孔导度(g_s)和K⁺含量降低的同时,Na⁺含量显著增加。而在叶片快速生长期,脂质过氧化物和脯氨酸显著积累。推测在高盐浓度胁迫下,这些有机物可能在高燕麦草叶片渗透调节和保护膜的稳定性上发挥着重要作用。综合分析,2种高燕麦草基因型对盐度的敏感度不同,ZXY03P-367相对ZXY03P-443具有较强的耐盐性。

关键词: 高燕麦草, 苗期, 盐胁迫

CLC Number:

Q945.78

YAN Hong-wei, WANG Zan, YANG Xi, WANG Xue-min, GAO Hong-wen. Response of Tall Oatgrass to Salinity Stress at the Seedling Stage[J]. , 2011, 19(1): 90-96.

闫洪唯, 王赞, 阳曦, 王学敏, 高洪文. 高燕麦草苗期对盐胁迫的响应[J]. , 2011, 19(1): 90-96.

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Response of Tall Oatgrass to Salinity Stress at the Seedling Stage

高燕麦草苗期对盐胁迫的响应

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