从新疆干旱地区获得的根瘤菌对盐、碱、高温和抗菌素等不利条件有较强的抗逆性。测试菌中分别有47%和32%的菌株在0.68mol/L 和0.86—1.03mol/L NaCl 的 YMA 培养基上生长;49%菌株在 pH4的 YMA 培养基上生长;85%在 pH10的 YMA 培养基上生...从新疆干旱地区获得的根瘤菌对盐、碱、高温和抗菌素等不利条件有较强的抗逆性。测试菌中分别有47%和32%的菌株在0.68mol/L 和0.86—1.03mol/L NaCl 的 YMA 培养基上生长;49%菌株在 pH4的 YMA 培养基上生长;85%在 pH10的 YMA 培养基上生长;43%菌株在43℃条件下生长;55%菌株60℃处理10分钟后仍然能正常生长;41%、26%菌株分别耐500r、1000r 的链霉素。新疆根瘤菌除具备一般根瘤菌鉴定特性外,测试菌中50%菌株利用柠檬酸;68%菌株液化明胶;36%菌株水解酪素,与一般根瘤菌反应特性不一致。展开更多
Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the...Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the seedlings of Robinia pseudoacacia clones were tested. Testing indexes included water content, the ratio of bound water content and free water content ( Va/Vs ), free proline, soluble sugar, soluble protein ect. The results showed that water content decreased with the increase of soil drought, the rest indexes increased in different extent. The range of variance differed among clones. It was difficult to evaluate exactly the drought resistance of different clones depending on only physiological and biochemical index.展开更多
文摘从新疆干旱地区获得的根瘤菌对盐、碱、高温和抗菌素等不利条件有较强的抗逆性。测试菌中分别有47%和32%的菌株在0.68mol/L 和0.86—1.03mol/L NaCl 的 YMA 培养基上生长;49%菌株在 pH4的 YMA 培养基上生长;85%在 pH10的 YMA 培养基上生长;43%菌株在43℃条件下生长;55%菌株60℃处理10分钟后仍然能正常生长;41%、26%菌株分别耐500r、1000r 的链霉素。新疆根瘤菌除具备一般根瘤菌鉴定特性外,测试菌中50%菌株利用柠檬酸;68%菌株液化明胶;36%菌株水解酪素,与一般根瘤菌反应特性不一致。
文摘Water stress can cause all kinds of physiological and biochemical responses on forest tree, which are indicated by changes of many physiological and biochemical indexes. Under the different drought extent of soil, the seedlings of Robinia pseudoacacia clones were tested. Testing indexes included water content, the ratio of bound water content and free water content ( Va/Vs ), free proline, soluble sugar, soluble protein ect. The results showed that water content decreased with the increase of soil drought, the rest indexes increased in different extent. The range of variance differed among clones. It was difficult to evaluate exactly the drought resistance of different clones depending on only physiological and biochemical index.