棉花学报2012，Vol.24Issue(6)：511-517,7.
冠菌素对棉花幼苗盐害的缓解效应
Ameliorating Effect of the Phytotoxin Coronatine on Seedlings of Transgenic Insect-resistant Cotton Variety under Salt Stress
摘要
Abstract
Salinity is the major environmcntal factor limiting cotton germination and growth during the seedling period. To evaluate the potential of the phytotoxin coronatine (COR) for alleviating salt stress on cotton germination and seedling growth, hydro-ponic culture experiments were carried out using transgenic insect-resistant cotton (Gossypium hirsutum L, cv. CCRI 45) treated with NaCl and COR. We found that cotton germination and seedling growth were limited under high level salt stress (150 mmol·L-1 NaCl), which increased the root/shoot ratio. The reduction in cotton biomass was alleviated by the application of COR (0.01 μmol·L-1). An in situ histochemistry assay indicated that COR at low concentrations decreased H2O2 accumulation under induced salt stress. COR appears to have potential as a positive regulator for improving the salt tolerance of cotton.关键词
冠菌素/盐胁迫/棉花/幼苗/缓解效应Key words
coronatine/ salt stress/ cotton/ seedlings/ ameliorating effect分类
农业科技引用本文复制引用
谢志霞,李茂营,杜明伟,李召虎,田晓莉,段留生..冠菌素对棉花幼苗盐害的缓解效应[J].棉花学报,2012,24(6):511-517,7.基金项目
国家自然基金(30871490) （30871490）
国家高技术研究发展计划(2011AA10A206) （2011AA10A206）
