应用生态学报2018，Vol.29Issue(3)：865-873,9.DOI:10.13287/j.1001-9332.201803.025
不同耐盐品种棉花根系主要指标对盐分胁迫的响应
Responses of main characters of root system to salt stress among cotton varieties with different salt tolerance
摘要
Abstract
A pot experiment was carried out to test the effects of salt levels on root morphology as well as the relationship between root morphology and salt tolerance with four cotton cultivars (saltsensitive cultivar CCRI45,weak salt-resistance cultivar XLZ17,moderate salt-resistance cultivar XLZ13 and salt-resistance cultivar CCRI35). Results showed that dry mass and K+ /Na+ ratio of cotton root and leaf were significantly reduced by salt stress. Dry mass of root and leaf and K+ /Na+ ratio of root of cultivars XLZ13 and CCRI35 were 69.3％-104.4％,24.8％-45.3％ and 25.0％-45.8％ higher than those of cultivar CCRI45,respectively. Root development was significantly restrained by salt stress. Total root length,total root surface area and total root volume of cultivars XLZ13 and CCRI35 were 15.2％-85.8％,12.0％-68.5％ and 31.7％-217.8％ higher than those of cultivar CCRI45,respectively. Furthermore,the length of fine and middle roots,root surface area and root volume of cultivars XLZ13 and CCRI35 in 0-10 cm soil layer were 27.2％-73.9％,39.6％-74.3％ and 99. 0％- 309. 7％ higher than those of cultivar CCRI45,respectively. Results from principal component analysis showed that the variations of specific root length,root length ratio at 0-10 cm soil layer and fine root length ratio at 0-10 cm soil layer among cultivars was significant. Specific root length,root length ratio at 0-10 cm soil layer and fine root length ratio at 0-10 cm soil layer were the main root characters to distinguish different salt tolerant cotton cultivars. Results from the stepwise regression analysis showed that specific root length,coarse root length,coarse root area,and coarse root volume at 0-10 cm and 10-20 cm soil layers,as well as fine root area and middle root ratio at 0-10 cm soil layer were sensitive to salt. Salt tolerant cultivar adapted to salt stress through increasing root length ratio,fine length ratio,and specific root length.关键词
棉花/盐分胁迫/根系形态/耐盐特性Key words
cotton/salt stress/root morphology/salt tolerance引用本文复制引用
王庆惠,韩伟,侯银莹,冯琳,叶祖鹏,顾惠敏,陈波浪..不同耐盐品种棉花根系主要指标对盐分胁迫的响应[J].应用生态学报,2018,29(3):865-873,9.基金项目
本文由新疆维吾尔族自治区重点研发任务专项(2016B01001-2-3)、国家自然科学基金项目(31260499)、新疆维吾尔族自治区科技人才培养项目(qn2015yx011)、国家级大学生创新创业训练计划项目(201610758008)和新疆维吾尔族自治区土壤学重点学科项目资助 （2016B01001-2-3）
