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5. 实验室条件下沙埋对人工藻结皮生物量、光合活性和胞外多糖的影响

实验室条件下沙埋对人工藻结皮生物量、光合活性和胞外多糖的影响

来源 :中国科学(C辑:生命科学) | 被引量 : 6次 | 上传用户：hoget

【摘 要】

：

土壤蓝藻结皮在干旱和半干旱地区广泛分布.沙埋是生长在流动沙丘表面的植物面临的重要的环境因子.实验研究了温室条件下干燥沙子不同掩埋时间(0,5,10,15,20,30天)和深度(0,0.2,0.5,1,2cm)对人工藻结皮生物量、叶绿素荧光活性和胞外多糖的影响.结果表明:大体上随着沙埋时间的延长和深度的增加人工藻结皮的F_v/F_m值和胞外多糖含量逐渐降低,但是在20天和30天沙埋处理之间,两者在不

【作 者】

：

王伟波 杨翠云 唐东山 李敦海 刘永定 胡春香 

【机 构】

：

中国科学院水生生物研究所,中国科学院研究生院

【出 处】

：

中国科学(C辑:生命科学)

【发表日期】

：

2007年02期

【关键词】

：

具鞘微鞘藻(Microcoleus vaginatus Gom.) 人工藻结皮 沙埋 生物量 光合活性 胞外多糖 

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论文部分内容阅读

土壤蓝藻结皮在干旱和半干旱地区广泛分布.沙埋是生长在流动沙丘表面的植物面临的重要的环境因子.实验研究了温室条件下干燥沙子不同掩埋时间(0,5,10,15,20,30天)和深度(0,0.2,0.5,1,2cm)对人工藻结皮生物量、叶绿素荧光活性和胞外多糖的影响.结果表明:大体上随着沙埋时间的延长和深度的增加人工藻结皮的F_v/F_m值和胞外多糖含量逐渐降低,但是在20天和30天沙埋处理之间,两者在不同沙埋深度均不存在显著性差异;生物量的降低出现在沙埋处理20天和30天,在不同的沙埋深度这2种处理时间之

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