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A review of the impact of allelopathy on soil microbial populations.
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نشاط Norouzi *   |
| Depertment of biology, CT.C. Islamic Azad university, Tehran, Iran. |
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Abstract: |
Allelopathic plants, especially those native to Southeast Asia and East Africa, which have proliferated in the humid tropics, subtropics, and warmer temperate regions of the world, are among the world's worst weeds. Extracts, leachates, root exudates, decomposed residues, and rhizosphere soil of allelopathic plants rapidly inhibit germination and growth of several plant species, including woody species, and reduce rhizobium nodulation and mycorrhizal populations. Several allelochemicals, such as fatty acids, terpenoids, simple phenols, benzoic acids, phenolic acids, phenolic aldehydes, phenylpropanoids, flavonoids, quinones, and alkaloids, are present in the extracts, leachates, root exudates, and/or growth media of allelopathic plants. These observations indicate that allelochemicals extracted from allelopathic plants and synthesized by extracts, leachates, and root secretions are released into the surrounding environment and lead to changes in the microbial community, including rhizobia and mycorrhizal fungi, by inhibiting germination and growth.Therefore, allelochemicals released from allelopathic plants not only alter the population of soil microorganisms by giving them a better chance of competing for survival and generation compared to native plants in that area, but also disrupt the regeneration process of native plants.
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| Keywords: Allelochemicals, Allelopathic plants, Microbial population, Rhizobium |
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Type of Study: Review |
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