NaCl胁迫下不同耐盐性狗牙根生长及生理响应差异分析  

Analysis on the Growth and Physiological Characteristics of Different Salt-Tolerant Cynodon dactylon under NaCl Stress

作　　者：李思媛 孙宗玖[1,2,3] 李培英 周磊[1] 聂婷婷 朱静 LI Si-yuan;SUN Zong-jiu;LI Pei-ying;ZHOU Lei;NIE Ting-ting;ZHU Jing(College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University,Urumqi 830052,China;Key Laboratory of Grassland Resources and Ecology of Xinjiang,Urumqi 830052,China;Key Laboratory of Grassland Resources and Ecology in Western Arid Region,Ministry of Agriculture,P. R. China,Urumqi 830052,China)

机构地区：[1]新疆农业大学草业与环境科学学院,乌鲁木齐830052 [2]新疆草地资源与生态自治区重点实验室,乌鲁木齐830052 [3]西北干旱荒漠区草地资源与生态教育部重点实验室,乌鲁木齐830052

出　　处：《新疆农业大学学报》2019年第2期107-113,共7页Journal of Xinjiang Agricultural University

基　　金：新疆农业大学大学生创新项目(dxscx2018029)

摘　　要：为探讨不同耐盐性狗牙根对盐胁迫响应差异,明确狗牙根盐适应机制。以耐盐(Cd026、Cd032)及不耐盐(Cd013、Cd043)狗牙根种质为材料,对其在不同NaCl胁迫下(0%、0.5%、1.0%、1.5%)苗期生长及生理指标进行测定。结果表明,随盐胁迫增加,狗牙根叶片枯黄率、叶片相对电导率呈增加趋势,株高、叶长、地上生物量、叶片相对含水量、叶绿素含量、气孔导度呈降低趋势,而净光合速率、蒸腾速率、地下生物量变化不明显或波动较大。盐胁迫后,与Cd013、Cd043比,Cd026、Cd032叶片相对电导率较低、增加缓慢,叶绿素含量相对较高,生物量积累较慢,枯黄率较低。In order to discuss the responsive difference of Cynodon dactylon to salt stress,the growth and physiological indexes of salt-resistance germplasm(Cd026 and Cd032) and non-salt germplasm(Cd013 and Cd043) under different salt stresses(the mass ratio of NaCl was 0%,0.5%,1.0% and 1.5%) at seedling stage were measured. The results showed that with the increasing of salt stress,leaves firing percentage and relative conductivity of C. dactylon showed an increasing trend,the height,leaves length,above biomass,leaves relative water content,chlorophyll content and stomatal conductance presented a downward trend,while net photosynthetic rate,transpiration rate,underground biomass displayed no significant changes or fluctuation. Compared with non-salt materials(Cd026 and Cd032), the leaves conductivity and its increase ratio for salt C. dactylon(Cd026 and Cd032) was slow,the chlorophyll content was high,the accumulating biomass was slow and the leaves firing percentage was little after salt stress.

关 键 词：狗牙根 盐胁迫 形态特征 钾钠比 光合性能 

分 类 号：S543.9[农业科学—作物学]