期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
不同理化因子对分离于荒漠生物结皮中念珠藻生长的影响
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1. 河北师范大学生命科学学院 050016;
2. 中国科学院新疆生态与地理研究所 830011;
3. 中国科学院研究生院 100039 -
DOI：
Influences of Different Physico -chemical Factors on Nostoc sp.Separated from Biological Soil Crusts
摘要/Abstract
通过对分离于生物结皮中的念珠藻(Nostoc sp。)进行室内培养，研究了K+浓度、Ca2+浓度、Mg2+浓度、pH值、温度、光照等理化因子对其生长的影响，初步探讨了念珠藻生长所需的最适生理条件。研究结果表明K+浓度、Ca2+浓度对念珠藻生长的影响为显著水平，pH值、Mg2+浓度对念珠藻生长的影响为极显著水平，温度和光照强度对念珠藻的影响不显著。多因素方差分析结果进一步表明，pH值、Ca2+浓度、Mg2+浓度对念珠藻生长的影响呈极显著水平，K+浓度对念珠藻生长的影响不显著。念珠藻的最适生长条件为温度25℃，光照强度66μmol。m-2s-1，pH=11，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。
The influencesof K+,Ca2+,Mg2+,pH value ,temperature ,light intensity on the growth of Nostoc sp . were studied by isolating , purifying and culturing under laboratory conditions. Physiological and ecological characteristics of Nostoc sp. were investigated primarily . The results revealed that the growth of Nostoc sp. was significantly influenced by K+ andCa2+,while Mg2+was highly significant . There were highly significant difference under different pH and no difference under different temperature and light intensity . The results of multivariate variance analysis showed that pH value,Ca2+,Mg2+had highly significant effect on the growth of Nostoc sp.,but K+had no difference. In addition ,the results also showed that the most favourable culturing conditions were at temperature 25 ℃,light intensity 66μ mol·m-2·s-1,pH 11 ,K+ concentration 5.38×10-5mol/L , Ca2+ concentration 1.77× 10-5mol/ L and Mg2+concentration was 1.02×10-4mol/L