摘要
对实验室分离荒漠生物结皮中的具鞘微鞘藻〔Microcoleus vaginatus(Vauch.)Gom.〕、眼点伪枝藻(Scy-tonema ocellatum Lyngb)、地木耳(Nostoc commune Vauch.)3种蓝藻分别进行了培养,利用正交设计的方法研究了pH值、K+、Ca2+、Mg2+4种理化因子对其生长的影响,初步探讨了3种蓝藻在实验室内生长所需的最适生理条件。研究结果表明,具鞘微鞘藻的最适生理条件:pH值为8,Ca2+浓度为3.54×10-5mol/L,Mg2+浓度为5.1×10-5mol/L,K+浓度为1.345×10-5mol/L;眼点伪枝藻的最适生理条件为:pH值9,Ca2+浓度为1.77×10-5mol/L,Mg2+浓度为5.1×10-5mol/L,K+浓度为2.69×10-5mol/L;地木耳的最适生理条件为:pH值为10,K+浓度为5.38×10-5mol/L,Ca2+浓度为1.77×10-5mol/L,Mg2+浓度为1.02×10-4mol/L。
Microcoleus vaginatus （Vauch. ） Gore., Scytonema ocellatum Lyngb and Nostoc commune Vauch. separated from biological soil crusts were cultured primarily under laboratory conditions. Meanwhile, the influences of different physico - chemical factors on them were also analyzed by orthogonal design. The results suggest that the best culturing conditions of Microcoleus vaginatus, Scytonema oceUatum, Nostoc commune is pH 8, Ca^2＋ concentration is 3.54×10^-5 mol/L and Mg^2＋ concentration is 5.1 ×10^-5 mol/L, K^＋ concentration is 1.345 ×10^-5 mol/L; pH 9, Ca^2＋ concentration is 1.77 ×10^-5 mol/L, Mg^2＋ concentration is 5.1 ×10^-5 mol/L and K^＋ concentration is 2.69 ×10^-5 mol/L; pH 10, Ca^2＋ concentration is 1.77 ×10^-5mol/L, Mg^2＋ concentration is 1.02 ×10^-4 mol/L and K^＋ concentration is 5.38 ×10^-5 mol/L.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第1期206-211,共6页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(40571085
40771114
30670152)
中国科学院知识创新工程重要方向项目(NKZCX2-YW-336)
关键词
生物结皮
蓝藻
理化因子
biological soil crests
cyanobacteria
physico-chemical factor
