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红果小檗种子萌发特性研究

ISSN号：1001-4705
期刊名称：《种子》
时间：0
分类：S793.9[农业科学—林木遗传育种;农业科学—林学]
作者机构：塔里木大学植物科学学院,新疆阿拉尔843300
相关基金：国家自然科学基金资助项目（编号：31160110）; 兵团青年科技创新资金专项（编号：2010JC 39）; 新疆生产建设兵团科技计划项目（编号：2012BB 045）; 新疆生产建设兵团科技攻关计划（编号：2011AB 015）; 塔里木大学校长基金创新群体研究项目（编号：TDZKSS 201302）

关键词：红果小檗, 光照, 温度, 盐胁迫, 干旱胁迫, 种子萌发, Berberis num mularia Bge, illumination, temperature, salt stress, drought stress, seed germination

中文摘要：

以红果小檗种子为对象,研究了不同光照、温度、盐胁迫和PEG模拟干旱胁迫条件下,红果小檗种子的萌发特性。结果表明：1）全光照、全黑暗及12h光照/12h黑暗3种不同的光照条件下,红果小檗种子的萌发规律无显著差异,说明红果小檗种子在萌发期对光没有特殊要求,属于中光性种子;2）不同温度条件下,其萌发率、发芽指数和发芽势均呈现出随温度升高而先上升后下降的趋势,且以25℃时最高,说明25℃是红果小檗种子萌发的最佳温度,且在萌发期较耐受低温,但不耐高温;3）在不同浓度的盐胁迫下,其萌发率、发芽指数和发芽势均呈现出随盐浓度升高而逐渐下降的趋势,但低盐胁迫下与对照并无显著差异,说明红果小檗种子在萌发期对低盐有较强的耐受性,0.2mol/L为红果小檗种子的半致死盐浓度;4）在不同干旱胁迫条件下,其萌发率、发芽指数和发芽势均呈现出随着干旱程度的增加而逐渐下降的趋势,PEG浓度达到10%时,仍有60%以上的萌发率,说明红果小檗种子在发芽期对干旱胁迫具有较强的耐受性,是一种较为耐旱的植物。

英文摘要：

Taking crabapple berberis seeds as the object,studies seed germination characteristics of Crabapple berberis under the condition of the different illumination,temperature,salt stress and drought stress.the results show that：1）under the three different light conditions of all light,all dark and 12hlight/12 hdark,crabapple berberis seed germination has no significant difference,that crabapple berberis has no special light requirements in seed germination stage,belongs to the optical seeds;2）under the condition of different temperature,the germination rate,germination index and germination potential basic presented with temperature rise and decline after rising first,and to the highest at25℃,25 ℃ is best temperature for crabapple berberis,seed germination and germination period is more resistant to low temperature,but not high temperature resistant;3）under different concentrations of salt stress,the germination rate,germination index and germination potential presents a decreasing trend with salt concentration,but lower under salt stress no significant difference with contrast,this suggests that euonymus berberis seed germination has strong tolerance to low salt,salt concentration 0.2mol/L for euonymus berberis seed lethal salt concentration;4）under the condition of different drought stress,germination rate,germination index and germination potential show a decreasing trend with increases of,the drought degree,PEG concentration reaches 10%,there is still more than 60% of the germination rate,suggests that euonymus berberis seed germination period has strong tolerance to drought stress,is a kind of relatively hardy plants.