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A mycorrhiza (from Ancient Greek μύκης (múkēs) 'fungus' and ῥίζα (rhíza) 'root'; pl. mycorrhizae, mycorrhiza, or mycorrhizas) [1] is a symbiotic association between a fungus and a plant. [2] The term mycorrhiza refers to the role of the fungus in the plant's rhizosphere, the plant root system and its surroundings
The mycorrhizosphere includes "roots, hyphae of the directly connected mycorrhizal fungi, associated microorganisms and the soil within their direct influence". [1] It is the region in which nutrients released from the root and the fungus increase the microbial population and its activities.
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]
An arbuscular mycorrhiza (AM) (plural mycorrhizae) is a type of mycorrhiza in which the symbiont fungus (AM fungi, or AMF) penetrates the cortical cells of the roots of a vascular plant forming arbuscules. Arbuscular mycorrhiza is a type of endomycorrhiza along with ericoid mycorrhiza and orchid mycorrhiza (not to be confused with ectomycorrhiza).
These include increased establishment success, higher growth rate and survivorship of seedlings; [57] improved inoculum availability for mycorrhizal infection; [58] transfer of water, carbon, nitrogen and other limiting resources increasing the probability for colonization in less favorable conditions. [3]
In addition, new data also suggests that AM fungi host plants also secrete chemical factors that attract and enhance the growth of developing spore hyphae towards the root system. [ 14 ] The necessary components for the colonization of Glomeromycota include the host's fine root system, proper development of intracellular arbuscular structures ...
Once regarded as a single species, observed variation in morphology, growth rates and response to growth conditions among C. geophilum isolates led researchers to speculate on possibility of cryptic speciation. Advances in molecular techniques have allowed researchers to test this hypothesis by examining the genetic variation in C. geophilum ...
Glomus is a genus of arbuscular mycorrhizal (AM) fungi, and all species form symbiotic relationships (mycorrhizae) with plant roots. Glomus is the largest genus of AM fungi, with ca. 85 species described, but is currently defined as non- monophyletic .