SIGNIFICANCE OF SOIL SALINITY ON ECOLOGY OF COCCIDIOIDES IMMITIS
SIGNIFICANCE OF SOIL SALINITY ON ECOLOGY OF COCCIDIOIDES IMMITIS
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DOI：
10.1128/jb.87.3.500-503.1964
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发表时间：
1964-01-01
影响因子：
3.2
通讯作者：
EGEBERG, MC
中科院分区：
文献类型：
--
作者：
ELCONIN, AF;EGEBERG, RO;EGEBERG, MC
对球虫病流行的一小块土地进行了为期8年的土壤研究。每隔一个月从土壤表面收集的5000多个样本进行了免疫球虫的检测。还对这些样品进行了分析，以确定其主要化学成分。在前3年，从春季样品中大量恢复了C. immitis，但在接下来的4年里，真菌几乎从这个流行地区消失了。在这项研究的最后一年的春天，C. immitis再次出现。这个地区的气候条件、动植物群都没有明显的变化。土壤的化学分析表明，在灰僵菌恢复的那些年里，土壤可溶性盐（主要是Na、Ca、SO4和Cl）明显升高。以饱和浸出物电导率表示的可溶性盐，在春季恢复金缕草时在11 ~ 27之间，未发现金缕草时在3.5 ~ 8.8之间。这种程度的相关性表明，高水平的表面盐度促进了C. immitis的生长，并且可能是该真菌在流行地区零星分布的一个因素。
An 8-year study of the soil in a small parcel of land where coccidioidomycosis is endemic was conducted. Over 5,000 samples collected from the surface of the soil at monthly intervals were tested for the presence of Coccidioides immitis. These samples were also analyzed to determine their major chemical composition. During the first 3 years, C. immitis was recovered in profusion from the spring samples, but during the next 4 years the fungus virtually disappeared from this endemic area. C. immitis reappeared in the spring of the final year of this study. There had been no significant deviation in the climatic conditions, flora, or fauna of the region. Chemical analysis of soils showed a marked elevation of the soluble salts (principally Na, Ca, SO4, and Cl) during those years when C. immitis was recovered. The soluble salts, expressed in terms of the saturation extract conductivity, ranged from 11 to 27 in those spring seasons when C. immitis was recovered, and from 3.5 to 8.8 when it was not found. This degree of correlation indicates that the high level of surface salinity encouraged the growth of C. immitis, and could be a factor in accounting for the spotty distribution of this fungus within endemic areas.