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A hypha (from Ancient Greek ὑφή (huphḗ) 'web'; pl.: hyphae) is a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium. [1] In most fungi, hyphae are the main mode of vegetative growth, and are collectively called a mycelium .
Mycelium (pl.: mycelia) [a] is a root-like structure of a fungus consisting of a mass of branching, thread-like hyphae. [1] Its normal form is that of branched, slender, entangled, anastomosing, hyaline threads. [2] Fungal colonies composed of mycelium are found in and on soil and many other substrates.
Mycelial cords are linear aggregations of parallel-oriented hyphae. The mature cords are composed of wide, empty vessel hyphae surrounded by narrower sheathing hyphae. Cords may look similar to plant roots, and also frequently have similar functions; hence they are also called rhizomorphs (literally, "root-forms"). As well as growing ...
A fungal mycelium containing abundant clamp connections was found that dated to the Pennsylvanian era (298.9–323.2 Mya). This fossil, classified in the form genus Palaeancistrus, has hyphae that compare with extant saprophytic basidiomycetes. [5]
The hyphae are then said to be dikaryotic. Conversely, the haploid mycelia are called monokaryons. Often, the dikaryotic mycelium is more vigorous than the individual monokaryotic mycelia, and proceeds to take over the substrate in which they are growing. The dikaryons can be long-lived, lasting years, decades, or centuries.
Ectomycorrhizal extramatrical mycelium (also known as extraradical mycelium) is the collection of filamentous fungal hyphae emanating from ectomycorrhizas. It may be composed of fine, hydrophilic hypha which branches frequently to explore and exploit the soil matrix or may aggregate to form rhizomorphs ; highly differentiated, hydrophobic ...
White threads of fungal mycelium are sometimes visible underneath leaf litter in a forest floor. A mycorrhizal network (also known as a common mycorrhizal network or CMN) is an underground network found in forests and other plant communities, created by the hyphae of mycorrhizal fungi joining with plant roots. This network connects individual ...
These hyphae are called ascogenous or fertile hyphae. They are supported by the vegetative mycelium containing uni– (or mono–) nucleate hyphae, which are sterile. The mycelium containing both sterile and fertile hyphae may grow into fruiting body, the ascocarp, which may contain millions of fertile hyphae.