摘要
通过PEG6000人工模拟干旱条件,研究了27个花生品种种子萌芽期对渗透胁迫的响应及抗旱性评价。结果表明,水分胁迫降低了各品种的发芽率,阻碍了胚根和胚芽的生长,降低了种子中贮藏物质的利用效率;不同品种抗旱性存在明显差异,在水分胁迫下抗旱性强的品种仍然保持较高的发芽率和生根率;在17.5%PEG6000水分胁迫处理下萌发期各指标a值(抗旱指数)品种间差异明显,可以作为花生品种抗旱鉴定浓度。
The study on the response stage was conducted through adopting PEG to water stress and drought resistance estimate of 27 varieties at germination solution simulated soil drought treatment. The results showed that the germinating vigor and gemainating rate, the growth rate of embryo bud and root, and the transformation percentage of stored drought-resistant varieties kept higher vigor of germination and rooting ratio. There was significant difference on the ＂a＂ value of every indexes of every peanut variety under 17.5 % PEG water stress, and it can be used as the concentration index of drought-resistance identification.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第5期173-182,共10页
Agricultural Research in the Arid Areas
基金
国家科技支撑计划项目(2006BAD21B04-2)
山东省农科院创新基金项目
关键词
花生品种
萌芽期
水分胁迫
抗旱性
peanut variety
germination stage
water stress
drought resistance
