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Arbuscular (from arbuscula, Latin for “tiny tree”) mycorrhizal (“fungus-root”) fungi have ancient origins as plant symbionts. The earliest fossil evidence of a glomeromycete arbuscule, the site of plant-fungi exchange, is known from the Rhynie Chert, which dates to 407 million years ago, during the Lower Devonian. [4]
Arbuscular mycorrhizal fungi are found in 80% of plant species [44] and have been surveyed on all continents except Antarctica. [45] [46] The biogeography of glomeromycota is influenced by dispersal limitation, [47] environmental factors such as climate, [45] soil series and soil pH, [46] soil nutrients [48] and plant community.
Distribution, phylogeny and taxonomy database of arbuscular mycorrhizal fungi was built in two phases: In the first phase of the study (2013–2015) occurrence of about 148 species of AM fungi was reported across 18 states of India namely: Andhra Pradesh, Assam, Bihar, Goa, Haryana, Jammu and Kashmir, Karnataka, Kerala, Madhya Pradesh ...
Rhizophagus irregularis is also commonly used in scientific studies of the effects of arbuscular mycorrhizal fungi on plant and soil improvement. Until 2001, the species was known and widely marketed as Glomus intraradices , but molecular analysis of ribosomal DNA led to the reclassification of all arbuscular fungi from Zygomycota phylum to the ...
A fully developed arbuscular mycorrhizal structure facilitates the two-way movement of nutrients between the host and mutualistic fungal partner. The symbiotic association allows the host plant to respond better to environmental stresses, and the non-photosynthetic fungi to obtain carbohydrates produced by photosynthesis. [14]
Glomus aggregatum is an arbuscular mycorrhizal fungus used as a soil inoculant in agriculture and horticulture.Like other species in this phylum it forms obligate symbioses with plant roots, where it obtains carbon (photosynthate) from the host plant in exchange for nutrients and other benefits.