Diseases

Tissue necrosis — soft wheat

Triticum aestivum L.

Tissue necrosis in soft wheat occurs either as a hypersensitive response (HR) in the presence of resistance genes, as a sign of susceptibility to necrotrophic pathogens, or as a symptom of physiological stress.

In the reference 6 varieties crop Bread wheat, where this is mentioned in the description.

In soft wheat, tissue necrosis is often the result of the plant's interaction with necrotrophic pathogens, such as Parastagonospora nodorum and Pyrenophora tritici-repentis species. These fungi produce necrotrophic effectors that, upon interaction with plant susceptibility proteins (e.g., Tsn1), induce cell death, thereby facilitating disease development.

From a genetic perspective, necrosis serves as an indicator of resistance via the hypersensitive response. For example, the Sr6 gene triggers local tissue death at the site of pathogen penetration, preventing the spread of infection. There are also physiological forms of necrosis, such as leaf tip necrosis, which may be genetically linked to rust resistance genes or caused by oxidative stress from temperature fluctuations and chemical exposure.

General information about the subject — on the page Tissue necrosis.

Sources8

Varieties of Bread wheat mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.