This particular mycorrhizal association began more than 400 million years ago with the first land plants and both partners have coevolved to the present day as obligate symbionts the fungi have evolved exclusively in their associations with host plants and so it is no surprise that they comprise a unique and separate evolutionary lineage now classified as the phylum glomeromycota the . 2 department of biology gandhigram rural institute tamilnadu 624302 india that accounts for vulnerability in sustainable agriculture of over 10 of arable land ensuing major yield loss of nearly 50 inclusive of key horticultural crops like tomato therefore improvement of tolerance of plants against abiotic stresses remains a major focus of agri cultural research in day to day . Yet the historical biochar enrichment of the terra preta soils hundreds to thousands of years ago remained the major driver of bacterial community composition irrespective of current land use soil texture soil mineralogy soil nutrient contents or ph with the notable large difference induced by the spodosol while a few additional otus were resolved in t rflp fingerprints from some of
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