THE EFFECT OF PHOSPHORUS ON THE FORMATION OF HYPHAE IN SOIL BY THE VESICULAR ARBUSCULAR MYCORRHIZAL FUNGUS, GLOMUS-FASCICULATUM
THE EFFECT OF PHOSPHORUS ON THE FORMATION OF HYPHAE IN SOIL BY THE VESICULAR ARBUSCULAR MYCORRHIZAL FUNGUS, GLOMUS-FASCICULATUM
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DOI：
10.1111/j.1469-8137.1984.tb03609.x
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发表时间：
1984-01-01
期刊：
影响因子：
9.4
通讯作者：
DEBOER, G
中科院分区：
文献类型：
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作者：
ABBOTT, LK;ROBSON, AD;DEBOER, G
VA菌根真菌G. fasciculatum（Thaxter sensu Gerd.）GERD.和Trappe的提取使用膜过滤技术和它们的长度估计的网格相交法。在取样程序进行调查后，对这种外部菌丝体的形成的影响进行了评估。磷的供应量从严重不足的地下三叶草[三叶草submarteum]的生长足够的。6周后，严重缺磷的缓解增加了感染根的长度和每厘米感染根的外部菌丝长度。进一步增加P降低了这两个测量。但每厘米病根产生最多外部菌丝的施磷水平高于产生最大病根长度的施磷水平。磷供应的增加，这给了最大的增加外部菌丝的长度每厘米的感染根也减少了泡囊的形成。在磷酸盐水平足够的菌根植物的生长，很少有外部菌丝在土壤中或囊泡内的菌根根的发展。
Hyphae formed in soil by the vesicular-arbuscular (VA) mycorrhizal fungus, G. fasciculatum (Thaxter sensu Gerd.) Gerd. and Trappe were extracted using the membrane filter technique and their length was estimated by the grid intersection method. The effect of P on the formation of this external mycelium was assessed after sampling procedures were investigated. P supply was varied from amounts severely deficient to those adequate for the growth of subterranean clover [Trifolium subterraneum]. After 6 wk, the alleviation of severe P deficiency increased both the length of infected root and the length of external hyphae per centimeter of infected root. Further additions of P decreased both of these measurements. However, the level of added P at which the most external hyphae were formed per centimeter of infected root was higher than the level of P which gave the greatest length of infected root. The increase in P supply which gave the greatest increase in the length of external hyphae per centimeter of infected root also decreased the formation of vesicles within infected roots. At phosphate levels adequate for growth of mycorrhizal plants, there was little development of either external hyphae in soil or vesicles within the mycorrhizal roots.