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Trichoderma harzianum

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Kingdom
  
Subdivision
  
Pezizomycotina

Family
  
Scientific name
  
Trichoderma harzianum

Rank
  
Species

Division
  
Order
  
Genus
  
Trichoderma

Higher classification
  
Trichoderma

Trichoderma harzianum EcoT Biostimulating microbial fertilizer Trichoderma harzianum

Similar
  
Trichoderma, Trichoderma viride, Rhizoctonia solani, Rhizoctonia, Fusarium oxysporum

The cerato platanin protein epl 1 from trichoderma harzianum is involved in mycoparasitism plant


Trichoderma harzianum is a fungus that is also used as a fungicide. It is used for foliar application, seed treatment and soil treatment for suppression of various disease causing fungal pathogens. Commercial biotechnological products such as 3Tac have been useful for treatment of Botrytis, Fusarium and Penicillium sp.. It is also used for manufacturing enzymes.

Contents

Trichoderma harzianum httpsuploadwikimediaorgwikipediacommonsthu

Telegrow trichoderma harzianum


Taxonomy and genetics

Trichoderma harzianum Trichoderma harzianum Wikipedia

Most Trichoderma strains have no sexual stage but instead produce only asexual spores. However, for a few strains the sexual stage is known, but not among strains that have usually been considered for biocontrol purposes. The sexual stage, when found, is within the Ascomycetes in the genus Hypocrea. Traditional taxonomy was based upon differences in morphology, primarily of the asexual sporulation apparatus, but more molecular approaches are now being used. Consequently, the taxa recently have gone from nine to at least thirty-three species.

Genetics

Most strains are highly adapted to an asexual life cycle. In the absence of meiosis, chromosome plasticity is the norm, and different strains have different numbers and sizes of chromosomes. Most cells have numerous nuclei, with some vegetative cells possessing more than 100. Various asexual genetic factors, such as parasexual recombination, mutation and other processes contribute to variation between nuclei in a single organism (thallus). Thus, the fungi are highly adaptable and evolve rapidly. There is great diversity in the genotype and phenotype of wild strains.

Trichoderma harzianum Trichoderma harzianum wwwmicrobiologybytescom Flickr

While wild strains are highly adaptable and may be heterokaryotic (contain nuclei of dissimilar genotype within a single organism, and hence highly variable), strains used for biocontrol in commercial agriculture are, or should be, homokaryotic (nuclei are all genetically similar or identical). This, coupled with tight control of variation through genetic drift, allows these commercial strains to be genetically distinct and nonvariable. This is an extremely important quality control item for any company wishing to commercialize these organisms.

Mycoparasitism

Trichoderma harzianum Ask Ed Grow Tip Trichoderma Harzianum Cannabis Culture

Trichoderma spp. are fungi that are present in nearly all soils. In soil, they frequently are the most prevalent culturable fungi. They also exist in many other diverse habitats.

Trichoderma readily colonizes plant roots and some strains are rhizosphere competent i.e. able to grow on roots as they develop. Trichoderma spp. also attack, parasitize and otherwise gain nutrition from other fungi. They have evolved numerous mechanisms for both attack of other fungi and for enhancing plant and root growth. Different strains of Trichoderma control almost every pathogenic fungus for which control has been sought. However, most Trichoderma strains are more efficient for control of some pathogens than others, and may be largely ineffective against some fungi.

Trichoderma spp. continue to be a major source of contamination and crop loss for mushroom farmers.

References

Trichoderma harzianum Wikipedia