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当前位置: 首页 > 文章 > 高效固氮菌株W12对环境因子的适应性研究 浙江大学学报(农业与生命科学版) 2002,28 (6)
Position: Home > Articles > Adaptability of a nitrogen-fixing strain W12 to the diverse environmental factors. Journal of Zhejiang University (Agriculture and Life Sciences) 2002,28 (6)

高效固氮菌株W12对环境因子的适应性研究

作  者：
张丽梅;方萍;季天委
单  位：
浙江大学资源科学系
关键词：
联合固氮菌;固氮酶活性;环境因子
摘  要：
从多个固氮菌株中筛选到一株固氮酶活性较高的菌株W12,为明确该菌株对不同环境因子的适应性,本文测定了不同的生长环境条件下该菌株的生长量和固氮酶活性.结果表明,在15～40℃的温度范围内、pH4～8.5酸性至碱性环境和1.5%NaCl的高渗透压下,该菌株均能旺盛生长并表现很高的固氮活性;该菌株能利用多种碳源生长并固氮,还能耐受环境中存在的一定浓度的铵.说明该菌株对环境因子具有较广的适应性,并具有较强的生长活力和较高的固氮酶活性,故可望作为接种剂的功能菌株.
译  名：
Adaptability of a nitrogen-fixing strain W12 to the diverse environmental factors.
作  者：
ZHANG Limei, FANG Ping, JI Tianweie and Plant Nutrition, Ministry of Agriculture, Hangzhou 310029, China)
关键词：
associative nitrogen fixing bacteria; nitrogenase activity; environmental factors
摘  要：
Effects of diverse environmental factors on the growth and nitrogenase activity of a nitrogenfixing bacteria strain W12 were investigated in our experiment. The results showed that W12 was capable of using various carbon sources, propagated quickly and exhibited quite high nitrogenase activity under a range of temperature, pH and sodium chloride concentration conditions: 1540 ℃, pH48.5, 0.011.5% NaCl. Nitrogenase activity could was also detected when W12 was cultured in the media containing 5 mmol/L NH4+. Accordingly, so far as its rapid growth and high nitrogen fixation activity were confident that W12 could easily adapt itself to diverse cultural environmental conditions and thus seems to be a promising inoculant in agricultural production.

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