锰离子和锌离子对根瘤菌生长的影响。
Effect of manganese and zinc ions on the growth of Rhizobium.
作者信息
Wilson D O, Reisenauer H M
出版信息
J Bacteriol. 1970 Jun;102(3):729-32. doi: 10.1128/jb.102.3.729-732.1970.
Five strains, representing four species of Rhizobium, were grown in specially purified synthetic culture solutions with manganese or zinc ion concentrations ranging from 0 to 10(-5)m. Omission of Mn(2+) restricted growth to 0.4 to 10% of that of controls, depending on the species. Growth was generally maximum with 10(-6)m Mn(2+) and nearly so with 10(-5)m. Omission of Zn(2+) restricted growth to 1 to 20% of that of controls. Growth was generally maximum with 10(-7)m Zn(2+). The 10(-5)m level of Zn(2+) was toxic to a variable degree to all species, suppressing the growth of one strain of R. meliloti to 49% of that of controls, and of R. phaseoli to only 0.4% of that of controls. A Mn(2+) x Zn(2+) interaction was also obtained as evidenced by a higher apparent Zn(2+) requirement with 10(-7)m Mn(2+) than with 10(-6)m Mn(2+).
代表四种根瘤菌的五株菌株，在锰或锌离子浓度范围为0至10⁻⁵摩尔/升的特制纯化合成培养液中培养。去除锰离子会使生长量限制在对照的0.4%至10%，具体取决于菌种。通常在锰离子浓度为10⁻⁶摩尔/升时生长量最大，在10⁻⁵摩尔/升时也接近最大值。去除锌离子会使生长量限制在对照的1%至20%。通常在锌离子浓度为10⁻⁷摩尔/升时生长量最大。锌离子浓度为10⁻⁵摩尔/升对所有菌种都有不同程度的毒性，使苜蓿根瘤菌的一个菌株生长量降至对照的49%，菜豆根瘤菌的生长量仅为对照的0.4%。还观察到锰离子×锌离子的相互作用，表现为在锰离子浓度为10⁻⁷摩尔/升时比在10⁻⁶摩尔/升时对锌离子的表观需求量更高。
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