植物学报2017，Vol.52Issue(4)：465-473,9.DOI:10.11983/CBB16045
盐胁迫对海岛棉和陆地棉幼苗生长及生理特性的影响
Effect of Salt Stress on Growth and Physiological Characteristics of Sea Island Cotton and Upland Cotton Cultivars
摘要
Abstract
Adopting a potting method with two Sea Island cotton varieties,Xinhai 21 and Xinhai 34,and two Upland cotton varieties,Xinluzao 50 and Xinluzao 57,as materials,we examined changes in growth,chlorophyll content,net photosynthetic rate,transpiration rate,antioxidant enzyme activity,osmotic adjustment substances and malondialdehyde (MDA) content between Sea Island cotton and Upland cotton under NaCl stress.With increasing salt concentration in soil,the growth,chlorophyll content,net photosynthetic rate and transpiration rate indicators declined to different degrees in the four varieties,whereas peroxidase (POD),superoxide dismutase (SOD) and soluble sugar content showed a trend of increasing first in level and then decreasing with increasing salt concentration,proline and malondialdehyde content.Xinhai 21 and 34 showed less impact of stress than Xinluzao 57 and 50.Under 0.6％ NaCl,the Sea Island cotton and Upland cotton cultivars showed good salt tolerance.The difference in salt tolerance between the two cultivated species was not significant.However,the growth of the four varieties was inhibited under 0.8％ and 1.0％ NaCl stress.Xinluzao 57 and 50 seedlings grew slowly,with small leaf area and little dry matter accumulation and even death.Leaves of cotton seedlings were sensitive to salt stress;the growth of leaf width and leaf length was inhibited with increasing salt concentration,which could be used as an index to select salt-tolerant varieties.关键词
NaCl胁迫/海岛棉/陆地棉/生理特性Key words
NaCl stress/Sea Island cotton/Upland cotton/physiological characteristics引用本文复制引用
阿曼古丽·买买提阿力,拉扎提·努尔布拉提,高丽丽,张巨松,田立文..盐胁迫对海岛棉和陆地棉幼苗生长及生理特性的影响[J].植物学报,2017,52(4):465-473,9.基金项目
国家十二五科技支撑计划(No.2014BAD11B02)和新疆维吾尔自治区十二五科技支撑项目(No.201231102) （No.2014BAD11B02）
