Sebacinales

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Sebacinales
Sebacina concrescens 16775.jpg
Helvellosebacina concrescens
Scientific classification
Kingdom:
Division:
Class:
Order:
Sebacinales

M.Weiss, Selosse, Rexer, A.Urb & Oberw. (2004)
Type genus
Sebacina
Tul. & C.Tul. (1873)
Families

Sebacinaceae
Serendipitaceae

The Sebacinales are an order of fungi in the class Agaricomycetes. Taxa have a widespread distribution and are mostly terrestrial, many forming mycorrhizas with a wide variety of plants, including orchids. [1] [2]


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Botany, also called plant science, plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word βοτάνη meaning "pasture", "herbs" "grass", or "fodder"; βοτάνη is in turn derived from βόσκειν, "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists study approximately 410,000 species of land plants of which some 391,000 species are vascular plants, and approximately 20,000 are bryophytes.

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<span class="mw-page-title-main">Vascular plant</span> Clade of land plants with xylem and phloem

Vascular plants, also called tracheophytes or collectively Tracheophyta, form a large group of land plants that have lignified tissues for conducting water and minerals throughout the plant. They also have a specialized non-lignified tissue to conduct products of photosynthesis. Vascular plants include the clubmosses, horsetails, ferns, gymnosperms, and angiosperms. Scientific names for the group include Tracheophyta, Tracheobionta and Equisetopsida sensu lato. Some early land plants had less developed vascular tissue; the term eutracheophyte has been used for all other vascular plants, including all living ones.

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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, including boreal forests, bogs, and heathlands. Molecular clock estimates suggest that the symbiosis originated approximately 140 million years ago.

<span class="mw-page-title-main">Agaricomycetes</span> Class of fungi

The Agaricomycetes are a class of fungi in the division Basidiomycota. The taxon is roughly identical to that defined for the Homobasidiomycetes by Hibbett & Thorn, with the inclusion of Auriculariales and Sebacinales. It includes not only mushroom-forming fungi, but also most species placed in the deprecated taxa Gasteromycetes and Homobasidiomycetes. Within the subdivision Agaricomycotina, which already excludes the smut and rust fungi, the Agaricomycetes can be further defined by the exclusion of the classes Tremellomycetes and Dacrymycetes, which are generally considered to be jelly fungi. However, a few former "jelly fungi", such as Auricularia, are classified in the Agaricomycetes. According to a 2008 estimate, Agaricomycetes include 17 orders, 100 families, 1147 genera, and about 21000 species. Modern molecular phylogenetic analyses have been since used to help define several new orders in the Agaricomycetes: Amylocorticiales, Jaapiales, Stereopsidales, and Lepidostromatales.

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<span class="mw-page-title-main">Plant</span> Kingdom of photosynthetic eukaryotes

Plants are eukaryotes, predominantly photosynthetic, that form the kingdom Plantae. Many are multicellular. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. All current definitions exclude the fungi and some of the algae. By one definition, plants form the clade Viridiplantae which consists of the green algae and the embryophytes or land plants. The latter include hornworts, liverworts, mosses, lycophytes, ferns, conifers and other gymnosperms, and flowering plants. A definition based on genomes includes the Viridiplantae, along with the red algae and the glaucophytes, in the clade Archaeplastida.

<span class="mw-page-title-main">Sebacinaceae</span> Genus of fungi

The Sebacinaceae are a family of fungi in the order Sebacinales. Species produce basidiocarps (fruit bodies} that are gelatinous or cartilaginous and variously corticioid, clavarioid, bracket-like, or jelly-like. Microscopically, all have septate basidia and hyphae lacking clamp connections. Many but not all species are mycorrhizal, forming associations with a wide range of plants.

<i>Sebacina</i> Genus of fungi

Sebacina is a genus of fungi in the family Sebacinaceae. Its species are mycorrhizal, forming a range of associations with trees and other plants. Basidiocarps are produced on soil and litter, sometimes partly encrusting stems of living plants. The fruit bodies are cartilaginous to rubbery-gelatinous and variously effused (corticioid) to coral-shaped (clavarioid). The genus has a cosmopolitan distribution.

<i>Ditangium</i> Genus of fungi


Ditangium is a genus of fungi in the family Sebacinaceae. Species form gelatinous basidiocarps (fruitbodies) on wood, often with similarly gelatinous anamorphs. The former were previously referred to the genus Craterocolla, whilst the latter were referred to Ditangium. Following changes to the International Code of Nomenclature for algae, fungi, and plants, the practice of giving different names to teleomorph and anamorph forms of the same fungus was discontinued, meaning that Craterocolla became a synonym of the earlier name Ditangium.

Serendipita indica is a fungal species of the order Sebacinales. It is an endophytic root-colonising species, discovered from orchid plants in the Thar desert in Rajasthan, India by Prof. Ajit Verma and group, School of Life Sciences, Jawaharlal Nehru University, New Delhi. The fungus has typical pear-shaped chlamydospores. S. indica can be easily grown on various substrates. It has been found to promote plant growth during its mutualistic symbiotic relationship with a wide variety of plants. Experiments have shown that S. indica increases the resistance of colonized plants against fungal pathogens. It has also been found in experiments with barley that S. indica-inoculated plants are tolerant to salt stress and more resistant to root pathogens. S. indica-infested roots also show antioxidant capacity. The fungus also induces systemic disease resistance in plants. S. indica was found to require host cell death for proliferation during mutualistic symbiosis in barley. Its genome has been sequenced and was published in 2011.

<i>Serendipita</i> Genus of fungi

Serendipita is a fungal genus of the order Sebacinales. It was described in 1993 with Serendipita vermifera as the type species. In 2016, this genus was moved into its own family Serendipitaceae.

The Serendipitaceae are a family of fungi in the order Sebacinales. Species do not produce visible basidiocarps, but form septate basidia on thin, trailing hyphae. Species are mycorrhizal, forming associations with a wide range of plants. Most species have only been detected through environmental DNA sampling or laboratory cultures. The family currently contains the single genus Serendipita.

References

  1. Cannon, P. F.; Kirk, P. M. (2007). Fungal families of the world. Wallingford: CABI. p. 328. ISBN   0-85199-827-5.
  2. Weiß, Michael; Waller, Frank; Zuccaro, Alga; Selosse, Marc‐André (July 2016). "Sebacinales – one thousand and one interactions with land plants". New Phytologist. 211 (1): 20–40. doi: 10.1111/nph.13977 .