]*>","")" /> Effects of NaCl Stress on Seeds Germination and Seedlings Growth of Betula halophila
Xinjiang Agricultural Sciences

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Effects of NaCl Stress on Seeds Germination and Seedlings Growth of Betula halophila

LI Hong;DENG Jiang-yu;CHENG Ping   

  • Received:2010-03-25 Revised:2010-03-25 Online:2010-03-25 Published:2010-03-25

NaCl胁迫对盐桦种子发芽和幼苗生长的影响

李宏;邓江宇;程平   

  1. 新疆林业科学院,乌鲁木齐,830000





摘要： [目的]盐胁迫对盐桦种子萌发和幼苗生长的影响.[方法]实验设置5个NaCl浓度(0、0.1;、0.2;、0.4;、0.6;),对盐桦种子和幼苗进行盐胁迫,测定其种子发芽率、发芽势、发芽指数、胚根长、胚芽长、叶长和叶宽.[结果]当浓度低于0.1;时,种子发芽率、发芽势、发芽指数、胚根长、胚芽长、叶长和叶宽均与对照差异不大,而当浓度大于0.2;时,盐桦种子的萌发和幼苗生长受到显著影响,并且随着NaCl浓度的增加,种子萌发和幼苗生长各项指标均呈明显下降的趋势.[结论]确定盐桦种子萌发的耐盐阈值为0.1;,并依此推断如此低的耐盐阈值可能是导致盐桦濒危的重要原因之一.