Search results
Results From The WOW.Com Content Network
The debate over whether fungal symbiosis is necessary for the orchid is an old one, as Noel Bernard first proposed orchid symbiosis in 1899. In 1922 the American botanist Lewis Knudson discovered that orchid seeds could be grown on agar and fungal sugars without mycorrhizae, however modern research has found that the germination of orchids may ...
Monotropa uniflora, an obligate myco-heterotroph known to parasitize fungi belonging to the Russulaceae. [1]Myco-heterotrophy (from Greek μύκης mýkes ' fungus ', ἕτερος héteros ' another ', ' different ' and τροφή trophé ' nutrition ') is a symbiotic relationship between certain kinds of plants and fungi, in which the plant gets all or part of its food from parasitism upon ...
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.
Dendrophylax lindenii has been noted to form a symbiotic relationship with the fungus Thelophoraceae in order to gain nutrients and in turn provide sugars to the fungus. [7] Due to the rare nature of these fungi, the ghost orchid cannot thrive in many ecosystems and is therefore considered rare. [8]
Epidendroideae is a subfamily of plants in the orchid family, Orchidaceae. Epidendroideae is larger than all the other orchid subfamilies together, comprising more than 15,000 species in 576 genera. Most epidendroid orchids are tropical epiphytes, typically with pseudobulbs.
In a natural ecosystem, plants simultaneously participate in symbiotic relationships with multiple fungi, and some of these relationships may be commensal or parasitic. The connectivity between plants believed to share a common mycorrhizal network is also difficult to verify in a natural ecosystem.
In order to extract sufficient nutrients from the substrata it grows in, Ophrys apifera relies upon a symbiotic relationship with mycorrhizal fungi in the genus Tulasnella, and possibly other genera. [11] [8] Bee orchids are threatened by mowing during flowering, or before the seed has been released.
Most orchid species lack endosperm in their seed and must enter symbiotic relationships with various mycorrhizal basidiomyceteous fungi that provide them the necessary nutrients to germinate, so almost all orchid species are mycoheterotrophic during germination and reliant upon fungi to complete their lifecycles.