The hex1 gene of Trichoderma simmonsii is involved in stress responses, biocontrol potential and wheat plant growth.

Woronin bodies are unique organelles in Pezizomycotina fungi that allow hyphae compartmentalization and prevent cytoplasmatic bleeding after mechanical injury. Several studies have related the peroxisomal protein HEX1, the major component of Woronin bodies with other biological processes such as hyphal growth, osmotic stress tolerance and pathogenicity. Trichoderma spp.

Why Is the Correct Selection of Strains Important? The Case of Wheat Endophytic Strains of and .

The search for endophytic fungi in the roots of healthy wheat plants from a non-irrigation field trial allowed us to select 4 out of a total of 54 cultivable isolates belonging to the genus , identified as T136 and T139, T137, and T138. In vitro assays against the phytopathogenic fungus showed that the strains had the highest biocontrol potential and that T136 exhibited the highest cellulase and chitinase activities. Production patterns of eight phytohormones varied among the strains.

Phytohormone Production Profiles in Species and Their Relationship to Wheat Plant Responses to Water Stress.

The production of eight phytohormones by species is described, as well as the 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase (ACCD) activity, which diverts the ethylene biosynthetic pathway in plants. The use of the strains T49, T68, T75 and T115 served to demonstrate the diverse production of the phytohormones gibberellins (GA) GA and GA, abscisic acid (ABA), salicylic acid (SA), auxin (indole-3-acetic acid: IAA) and the cytokinins (CK) dihydrozeatin (DHZ), isopenteniladenine (iP) and trans-zeatin (tZ) in this genus. Such production is dependent on strain and/or culture medium.