摘要
采用不同浓度的PEG(聚乙二醇6000)溶液模拟土壤自然水势,对棉花种子萌发进行人工水分胁迫试验。结果表明,随着水势的下降,发芽率、发芽速度、发芽指数、苗高、根长、根茎比、幼苗干、鲜重等都出现不同程度的降低。发芽率和根茎比的降低在轻度水分胁迫(10%)下不明显,随PEG浓度上升到15%以上时,上述指标均受到强烈抑制。
The effect of water stress on germination of cotton seeds was studied,while different treatments were simulated as different concentrations of polyethylene glycol(PEG).The result showed that as water potential decreased,germination percentage,speed of germination,germination index,vigor index,sprout length,roots length,R/S(ratio of root to shoot),fresh and dry weight of plant decreased in different extent.The decreasing extent of percentage germination and R/S were not distinct in lower stress.However,all o...
出处
《棉花学报》
CSCD
北大核心
2009年第1期73-76,共4页
Cotton Science
基金
国家社会公益研究专项(2004DIB4J146)
关键词
棉花种子
水分胁迫
发芽率
发芽速度
发芽指数
根茎比
cotton seed
water stress
germination percentage
speed of germination
germination index
root/shoot
