Calcium and the biological activities of two Streptomyces species isolated from the rhizosphere of soybean plants
Calcium and the biological activities of two Streptomyces species isolated from the rhizosphere of soybean plants
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大豆根际分离的两种链霉菌的钙和生物活性
DOI：
10.1002/jobm.3620290109
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发表时间：
1989
影响因子：
3.1
通讯作者：
A. Shalaby
中科院分区：
文献类型：
--
作者：
Zeinat Kamel;M. Khalil;A. Shalaby
仔细检查这两种生物的特征，发现我们正在处理的是紫色产色链霉菌和灰色链霉菌。氯化钙降低了两种微生物的渗透性，如其培养基中总氮含量低于对照所示。小剂量硝酸钙可抑制S. violaceochromogenes和增加S.而较大剂量对两种生物体都有刺激作用。硝酸钙对S.而不影响S.灰绿色的随着钙浓度的增加，钙的刺激作用逐渐减弱。氯化钙可提高S. violaceochromogenes media;在S.仅在较大剂量的情况下，才对glaucescens培养基产生影响。硝酸钙抑制S.粉背蕨两种菌的纤维素分解活性都受到钙的抑制，但淀粉酶在S.粉背蕨S.较低水平的钙抑制了紫色产色细胞的活性，但较大剂量的钙恢复或刺激了它们的活性。
Careful examination of the characteristics of both organisms revealed that we are dealing with Streptomyces violaceochromogenes and Streptomyces glaucescens. Calcium chloride decreased the permeability of both organisms as indicated by the low total nitrogen content of their media compared to the controls. Small doses of calcium nitrate suppressed the permeability of S. violaceochromogenes and increased that of S. glaucescens whereas the larger doses were stimulatory for both organisms. Calcium nitrate had similar effects on S. violaceochromogenes only without affecting S. glaucescens. The stimulatory effects of calcium gradually faded with increased concentration. Calcium chloride increased the proteolytic activity in S. violaceochromogenes media; a phenomenon that was apparent in S. glaucescens media only in the case of the larger doses. Calcium nitrate suppressed the proteolytic activity in S. glaucescens media. The cellulolytic activity of both organisms was suppressed by calcium but amylases were initiated in S. glaucescens media. Those of S. violaceochromogenes were arrested with the lower levels of calcium but the larger doses restored or stimulated their activity.