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当前位置: 首页 > 文章 > NaCl胁迫下苞片对华北驼绒藜种子萌发的影响 草业学报 2008,17 (6) 62-67
Position: Home > Articles > Effects of bracts on seed germination of Ceratoides arborescens in sodium chloride Acta Prataculturae Sinica 2008,17 (6) 62-67

NaCl胁迫下苞片对华北驼绒藜种子萌发的影响

作  者：
薛建国;韩建国;柳小妮;邓波;王显国;张铁军
单  位：
中国农业大学草地研究所;甘肃农业大学草业学院
关键词：
华北驼绒藜;NaCl胁迫;苞片;种子萌发
摘  要：
对去苞片和带苞片的华北驼绒藜种子在不同的盐浓度下进行处理,带苞片种子的发芽率、发芽指数、活力指数均高于去苞片的。在NaCl浓度为70,140,210,280和420 mmol/L时,带苞片种子的发芽率显著高于去苞片的(P<0.05),分别为90.00%,89.00%,79.75%,69.25%,53.75%和78.50%,81.50%,74.00%,62.25%和39.25%。用蒸馏水和490 mmol/L的NaCl溶液对带苞片和去苞片的华北驼绒藜的种子处理12 h,带苞片种子吸水率均低于去苞片的,苞片延缓了种子的吸水率。490 mmol/L NaCl处理华北驼绒藜种子1,3和7 d后,苞片中Na+含量显著增加(P<0.05)。说明华北驼绒藜种子的苞片可以吸附一部分Na+,减少对胚的伤害。苞片对华北驼绒藜在荒漠盐渍环境中的定植具有重要的意义。
译  名：
Effects of bracts on seed germination of Ceratoides arborescens in sodium chloride
作  者：
XUE Jian-guo1,2,HAN Jian-guo1,LIU Xiao-ni2,DENG Bo1,WANG Xian-guo1,ZHANG Tie-jun1(1.Institute of Grassland Science,China Agricultural University,Beijing 100193,China;2.College of the Grassland Science,Gansu Agricultural University,Lanzhou 730070,China)
关键词：
Ceratoides arborescens;sodium chloride stress;bracts;seed germination
摘  要：
In this study,two treatments(with and without bracts) were evaluated on seeds treated with different NaCl solutions.Seeds with bracts had higher germination percentage,germination index,and vigour index than seeds without bracts.The germination percentage of bracteolate seeds was significantly(P<0.05) higher than that of seeds without bracts at salinities of 70,140,210,280,and 420 mmol/L,with germination percentages of 90.00%,89.00%,79.75%,69.25%,53.75%(bracts) and 78.50%,81.50%,74.00%,62.25%,39.25%(no bracts),respectively.The rate of water uptake of seeds with bracts was higher than that of those without bracts in both distilled water and NaCl solutions.After treating seeds with or without bracts in 490 mmol/L NaCl solution for 1,3,or 7 d,the Na+ contents significantly increased in the bracts.The bracts absorbed Na+ and reduced the damage to the embryo.Therefore the presence of bracts is of great importance when Ceratoides arborescens is planted in saline desert environments.

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