Fusarium redolens | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Ascomycota |
Class: | Sordariomycetes |
Order: | Hypocreales |
Family: | Nectriaceae |
Genus: | Fusarium |
Species: | F. redolens |
Binomial name | |
Fusarium redolens Wollenw., (1913) | |
Synonyms | |
Fusarium oxysporum var. redolens(Wollenw.) W.L. Gordon, (1952) Contents |
Fusarium redolens is a species of fungus in the genus Fusarium and family Nectriaceae. [1] This species is a soil-borne plant pathogen in temperate prairies. [2] It causes diseases such as root, crown, and spear rot, seedling damping-off, and wilting disease. [1] [3] [4] It is a known producer of the alkaloids peimisine and imperialine-3β-d-glucoside, which has implications for traditional Chinese medicine. [5]
Fusarium redolens was described for the first time by Hans Wilhelm Wollenweber in 1913. [2] He originally placed it in the Fusarium section Elegans. All of the members of this group were considered synonymous with Fusarium oxysporum. However, this placing was disputed, and it has since been discovered through gene genealogies that F. redolens does not belong in the Elegans group and F. redolens is not even a sister taxon of F. oxysporum. Fusarium hostae has been found as a sister taxon to F. redolens, and they form a strongly supported clade (100% bootstrap). [6]
The mycelium of F. redolens is composed of hyphae that have been noted to appear fibrous, powdery, or like “cotton wool.” [7] Mycelia can be white, cream, or pink. [2] [8] [9] The central region appears pink and gradually lightens towards the edge where the marginal hyphae are white. [9] F. redolens produces orange and brown pigments in the growth substrate. [2] [7] Colonies have been observed to grow to 75–80 mm in 10 days. [2]
F. redolens has conidia and chlamydospores. Conidia are generally smooth, cylindrical, and slightly sickle-shaped. [9] Macroconidia have wider upper cells and hook-shaped end cells. Macroconidia have 3-5 septa and are about 45.9 by 2.58 micrometers in size. Microconidia are oval or cylinder-shaped and are about 10.68 by 3.18 micrometers in size. Chlamydospores are abundant and spherical or oval-shaped, rough-walled, and slightly pigmented. [2]
This species’ morphology is visually indistinguishable from that of Fusaruim oxysporum . [1] [3] [4] Intermediates also exist between the two species. [3] These species cause similar, at times identical, symptoms in plant hosts and can occur together in infections. [1] [4] Differentiating between the two species is important for the efficient management of their associated diseases through species-specific diagnostics and development of resistant germplasms in hosts. [1] [6] Restriction fragment length polymorphism (RFLP) analysis of the ribosomal DNA (rDNA) internal transcribed spacer (ITS) region is used to differentiate the two. They have four different nucleotides on the 28S gene. [3] [6]
F. redolens inhabits soil primarily in prairies. [2] [8] These prairies are most often in temperate areas. [2] It is able to survive in the soil for years without a plant host. [7] It has a worldwide range and has been isolated in Algeria, Canada, China, Germany, Greece, Italy, Kazakhstan, Lebanon, Morocco, the Netherlands, New Zealand, Pakistan, Poland, South Africa, Spain, Turkey, the United States, and the United Kingdom. [1] [2] [3] [8] [9] [10]
Fusarium redolens is a known plant pathogen that can cause a variety of disease symptoms in the host. [5] Recorded plant hosts are Aleppo pine, American ginseng, asparagus, barley, carnation, chickpea, flax, lentil, onion, pea, pelargonium, potato, rose, soybean, spinach, tomato, wheat, and wild rocket. [1] [2] [3] [7] [8] [9] [10] Depending on the host, F. redolens causes root, crown, and/or spear rot, seedling damping-off, and wilt diseases. [1] [3] [4] Symptoms of infection include brown to black necrotic lesions on roots, foliar yellowing, wilting, reduction of emergence, stunting, and rotting of seeds and seedlings. [1] [2] [8] [10] In some cases, seedlings have been found entirely deceased. In plants of the family Poaceae such as barley, heads and spikes are infected as well. [2] It has been noted that it is a weaker pathogen on chickpea, as infections did not kill studied chickpea plants. [1] Three host-specific strains exist and are named accordingly. [3] F. redolens f. sp. Dianthi Gerlach, F. redolens f. sp. Spinaciae (Sherb.) Subramanian, and F. redolens f. sp. asparagi Baayen. [3] [4] While F. redolens causes similar symptoms in plants as Fusarium oxysporum , it is important to differentiate between these species when assessing an infection for contributions towards developing resistant germplasms in target crops. [1]
Fusarium redolens is capable of producing alkaline compounds that are similar to its host plant. Most notably, it produces peimisine and imperialine-3β-d-glucoside when inhabiting Fritillaria unibracteata var. wabuensis (FUW) as an endophyte. Both of these compounds are major alkaloids that are found in bulbus Fritillariae cirrhosae (BFC), which is an herb sourced from FUW. BFC has been used in traditional Chinese medicine for over 2000 years to treat respiratory diseases and has a $400 million USD industry surrounding it. BFC is increasingly hard to find due to long-term excessive harvesting. The ability of F. redolens to produce peimisine and imperialine-3β-d-glucoside is highly significant for the development of microbial resources to protect plant resources. However, the capacity of fungi to produce alkaloids is not as high as the host plant, so the fungi are not yet able to be used on an industrial scale. [5]
Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or "gray mold".
Fusarium oxysporum, an ascomycete fungus, comprises all the species, varieties and forms recognized by Wollenweber and Reinking within an infrageneric grouping called section Elegans. It is part of the family Nectriaceae.
Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is Fusarium oxysporum. The species is further divided into formae speciales based on host plant.
Panama disease is a plant disease that infects banana plants. It is a wilting disease caused by the fungus Fusarium oxysporum f. sp. cubense (Foc). The pathogen is resistant to fungicides and its control is limited to phytosanitary measures.
Fusarium is a large genus of filamentous fungi, part of a group often referred to as hyphomycetes, widely distributed in soil and associated with plants. Most species are harmless saprobes, and are relatively abundant members of the soil microbial community. Some species produce mycotoxins in cereal crops that can affect human and animal health if they enter the food chain. The main toxins produced by these Fusarium species are fumonisins and trichothecenes. Despite most species apparently being harmless, some Fusarium species and subspecific groups are among the most important fungal pathogens of plants and animals.
Rhizoctonia solani is a species of fungus in the order Cantharellales. Basidiocarps are thin, effused, and web-like, but the fungus is more typically encountered in its anamorphic state, as hyphae and sclerotia. The name Rhizoctonia solani is currently applied to a complex of related species that await further research. In its wide sense, Rhizoctonia solani is a facultative plant pathogen with a wide host range and worldwide distribution. It causes various plant diseases such as root rot, damping off, and wire stem. It can also form mycorrhizal associations with orchids.
Fusarium culmorum is a fungal plant pathogen and the causal agent of seedling blight, foot rot, ear blight, stalk rot, common root rot and other diseases of cereals, grasses, and a wide variety of monocots and dicots. In coastal dunegrass, F. culmorum is a nonpathogenic symbiont conferring both salt and drought tolerance to the plant.
Aphanomyces euteiches is a water mould, or oomycete, plant pathogen responsible for the disease Aphanomyces root rot. The species Aphanomyces euteiches can infect a variety of legumes. Symptoms of the disease can differ among hosts but generally include reduced root volume and function, leading to stunting and chlorotic foliage. Aphanomyces root rot is an important agricultural disease in the United States, Europe, Australia, New Zealand, and Japan. Management includes using resistant crop varieties and having good soil drainage, as well as testing soil for the pathogen to avoid infected fields.
Phytophthora medicaginis is an oomycete plant pathogen that causes root rot in alfalfa and chickpea. It is a major disease of these plants and is found wherever they are grown. P. medicaginis causes failure of stand establishment because of seedling death. Phytophthora medicaginis is part of a species complex with Phytophthora megasperma.
Crown rot of wheat is caused by the fungal pathogen Fusarium pseudograminearum. F. pseudograminearum is a member of the fungal phylum Ascomycota and is also known as Gibberella coronicola (teleomorph). It is a monoecious fungus, meaning it does not require another host other than wheat to complete its life cycle. Although F. pseudograminearum can produce both anamorphic and teleomorphic states, the teleomorph is usually not present for crown rot of wheat. This Fusarium species has, until recently, been considered to be the same as the species known as Fusarium graminearum due to many similar characteristics. One of the only differences between the two species is that F. pseudograminearum lacks its sexual stage on the wheat host.
Fusarium oxysporum f.sp. betae is a destructive fungal plant pathogen. It causes Fusarium yellows or fusarium wilt, characterized by yellowing and dwarfing.
Fusarium oxysporum f.sp. ciceris is a fungal plant pathogen that causes fusarium wilt of chickpea.
Pythium dissotocum is a plant pathogen infecting strawberry and rice.
Fusarium solani is a species complex of at least 26 closely related filamentous fungi in the division Ascomycota, family Nectriaceae. It is the anamorph of Nectria haematococca. It is a common soil fungus and colonist of plant materials. Fusarium solani is implicated in plant disease as well as human disease notably infection of the cornea of the eye.
Armillaria novae-zelandiae is a species of mushroom-forming fungus in the family Physalacriaceae. This plant pathogen species is one of three Armillaria species that have been identified in New Zealand.
Black rot, caused by the bacterium Xanthomonas campestris pv. campestris (Xcc), is considered the most important and most destructive disease of crucifers, infecting all cultivated varieties of brassicas worldwide. This disease was first described by botanist and entomologist Harrison Garman in Lexington, Kentucky, US in 1889. Since then, it has been found in nearly every country in which vegetable brassicas are commercially cultivated.
Fusarium oxysporum f. sp. cubense is a fungal plant pathogen that causes Panama disease of banana, also known as fusarium wilt of banana. The fungi and the related disease are responsible for widespread pressure on banana growing regions, destroying the economic viability of several commercially important banana varieties.
Beet vascular necrosis and rot is a soft rot disease caused by the bacterium Pectobacterium carotovorum subsp. betavasculorum, which has also been known as Pectobacterium betavasculorum and Erwinia carotovora subsp. betavasculorum. It was classified in the genus Erwinia until genetic evidence suggested that it belongs to its own group; however, the name Erwinia is still in use. As such, the disease is sometimes called Erwinia rot today. It is a very destructive disease that has been reported across the United States as well as in Egypt. Symptoms include wilting and black streaks on the leaves and petioles. It is usually not fatal to the plant, but in severe cases the beets will become hollowed and unmarketable. The bacteria is a generalist species which rots beets and other plants by secreting digestive enzymes that break down the cell wall and parenchyma tissues. The bacteria thrive in warm and wet conditions, but cannot survive long in fallow soil. However, it is able to persist for long periods of time in the rhizosphere of weeds and non-host crops. While it is difficult to eradicate, there are cultural practices that can be used to control the spread of the disease, such as avoiding injury to the plants and reducing or eliminating application of nitrogen fertilizer.
Koa wilt is a relatively new disease to Hawaii, discovered in 1980. Koa wilt is caused by a forma specialis of the fungus Fusarium oxysporum, which is now abundant in Hawaiian soils and infects the native Acacia koa tree, a once-dominant species in the canopy of Hawaiian forests. Fusarium oxysporum f.sp. koae is believed to have been brought into Hawaii on an ornamental acacia plant. Fusarium fungi clog the tree xylem, causing significant wilt and mortality among these beautiful and iconic Hawaiian trees.
Vascular wilt in the perennial shrub lulo or naranjilla is a disease caused by the fungus Fusarium oxysporum f. sp. quitoense.