摘要
为了研究光皮桦种子在干旱条件下的萌发及生长状况,采用不同浓度的PEG-6000(聚乙二醇)模拟干旱,研究不同干旱胁迫强度对光皮桦种子萌发和幼苗生长的影响。结果表明:种子的发芽率、发芽势、发芽指数、抗旱指数均在5%浓度处理时最高;在5%浓度处理下幼苗的上胚轴最长,下胚轴长度在没有PEG胁迫下最长。这说明了较低浓度的PEG对光皮桦种子的萌发有明显的促进作用,同时能够对其幼苗上胚轴的生长有促进作用。
To determine the germination and seedling growth of Betula luminifera under drought stress, seed germination and seedling growth of Betula luminifera were assessed by the different concentration of polyethylene glycol （PEG6000）simulated drought stress. The results showed that the germination rate （GR）, germination potential （GP）, germination index （GI）and drought resistant index were the highest in 5% concentration of the PEG-6000.The epicotyl was also the longest in 5% concentration of the PEG-6000,and The hypoeotyl was longest under no PEG condition.The results indicated that low concentration PEG could promote the germination of Betula luminifera and the growth of epieotyl.
出处
《黑龙江八一农垦大学学报》
2013年第6期13-16,共4页
journal of heilongjiang bayi agricultural university
基金
省级优秀青年人才基金项目(2012SQRL185)
关键词
PEG
光皮桦
干旱胁迫
PEG
Betula luminifera
drought stress
