Variety traits

Rose tolerance

Rosa L.

The ability of rose cultivars to maintain viability, decorative value, and productivity under biotic or abiotic stress conditions without complete plant mortality.

In the reference 64 varieties crop Rose, where this is mentioned in the description.

Biotic tolerance in roses is primarily assessed visually based on the degree of infection by powdery mildew or black spot. Professional certification often employs a scoring scale from 0, corresponding to immunity, to 4, indicating high susceptibility with pronounced pathogen symptoms.

Abiotic tolerance to environmental factors, such as drought, salinity, or temperature fluctuations, is determined through physiological markers. These include measurements of chlorophyll fluorescence for frost hardiness assessment, analysis of electrolyte leakage and malondialdehyde content for heat stress diagnosis, as well as indicators of gas exchange and transpiration rates.

When evaluating the trait, production parameters such as plant biomass, as well as flower count and size, are taken into account. Tolerant cultivars under extreme temperatures, for instance above 30°C, demonstrate a lower tendency for petal abscission, maintaining marketability and flowering stability.

General information about the subject — on the page Tolerance.

Sources8

Varieties of Rose 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.