Identification of potential allelopathic subatances in rhizosphere soil under Green Prickleyash were made in gas chromotagraph-mass spectrometer (GC-MS). Some 25 and 29 compounds were determined respectively from the ...
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Identification of potential allelopathic subatances in rhizosphere soil under Green Prickleyash were made in gas chromotagraph-mass spectrometer (GC-MS). Some 25 and 29 compounds were determined respectively from the topsoil and deep-seated soil samples. The compounds mainly include alkyl, alcohol, ester, benzene, hydroxybenzene, amine, etc, many of which were reported as allelochemicals. The results showed that the allelopathic substance exist in Rhizosphere-soil of Green Prickleyash really.
Allelopathic phenomenon has been defined as that produced mediated by secondary metabolites released by one species to influence to the development of other species. These natural products exhibit a diversity of biolo...
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Allelopathic phenomenon has been defined as that produced mediated by secondary metabolites released by one species to influence to the development of other species. These natural products exhibit a diversity of biological activities. But, they can suffer physical, chemical as well as microbial degradation. This microbial degradation can be produced by a wide variety of fungi and other microorganisms. Sometimes the degradation products are as active or even more than the original released compounds.
Various microbial populations with TOC contents and pH values in the rhizosphere soil of barnyard grass under different densities were studied in paddy. The results showed that bacteria and actinomycetes are major mic...
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Various microbial populations with TOC contents and pH values in the rhizosphere soil of barnyard grass under different densities were studied in paddy. The results showed that bacteria and actinomycetes are major microbes in the rhizosphere soil of barnyard grass. With the increasing density of barnyard grass, the numbers of bacteria fell down first and then increased, while the numbers of actinomycetes increased first, then fell down. However, fungi numbers always decreased with the increasing density of barnyard grass. Furthermore, the changes of TOC contents were similar with that of bacterial and that of pH values were similar with fungi. The results suggested that the effects of barnyard grass under different densities on rhizosphere soil microorganism were correlated with the metabolites from barnyard grass root exudates in paddy.
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