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A mycorrhiza is a symbiotic association between a green plant and a fungus. The plant makes organic molecules by photosynthesis and supplies them to the fungus in the form of sugars or lipids, while the fungus supplies the plant with water and mineral nutrients, such as phosphorus, taken from the soil.
Arbuscular mycorrhizal networks are those in which fungal hyphae not only enter the plant's roots but also penetrate into the cells themselves. Ectomycorrhizal networks send hyphae into the roots where they thread their way between the plant cells but do not penetrate cell walls. The arbuscular type is the most common among land plants and is ...
Apart from the unique peloton structures which transfer nitrogen and phosphorus from mycorrhizal fungi to orchid plants the transfer of these nutrients, as discussed above is almost identical to that observed in arbuscular mycorrhiza and ericoid mycorrhiza, but when it comes to arguably the most fundamental element involved in mycorrhizal ...
The mycorrhizae allow the plants to increase their biomass, which increases their tolerance to heavy metals.The fungi also stimulate the uptake of heavy metals (such as manganese and cadmium) with the enzymes and organic acids (such as acetic acid and malic acid) that they excrete into their surroundings in order to digest them.
Basidiomycota fungi form ecto-, orchid, monotropoid, arbutoid, and some ericoid mycorrhizae. Fungal hyphae are thinner than plant roots, which allows them to penetrate areas in the soil with moisture and nutrient that are inaccessible to roots. In some cases, mycorrhizal fungi in the mycorrhizosphere may ward off fungal plant pathogens.
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.
A single plant with its associated fungus is not an isolated entity. It has been shown that mycelia from the roots of one plant actually colonize the roots of nearby plants, creating an underground network of plants of the same or different species. This network is known as a common mycorrhizal network (CMN). It has been demonstrated that ...
The ericoid mycorrhiza is a mutualistic relationship formed between members of the plant family Ericaceae and several lineages of mycorrhizal fungi. This symbiosis represents an important adaptation to acidic and nutrient poor soils that species in the Ericaceae typically inhabit, [ 1 ] including boreal forests , bogs , and heathlands .
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