Variety traits
Lactuca sativa L.
Tolerance in lettuce is expressed as the ability of plants to maintain productivity and quality under abiotic stresses, such as high temperatures or substrate salinity.
In the reference 236 varieties crop Lettuce, where this is mentioned in the description.
Thermotolerance in lettuce is assessed by the ability of seeds to germinate at 30 °C and the resistance of adult plants to premature bolting and tipburn. Key indicators include the thermo-inhibition coefficient, germination rate, and scoring scales for internode elongation.
When assessing salinity tolerance, the effect of salt concentration on marketable leaf biomass, leaf surface area, and pigment content is measured. Lettuce is considered a moderately sensitive crop, which, under stress, typically exhibits a decrease in market quality and the development of bitterness in the leaves.
General information about the subject — on the page Tolerance.
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.
Lactuca sativa L. · Lettuce
ROYAL SLUIS
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Lactuca sativa L. · Lettuce
RIJK ZWAAN ZAADTEELT EN ZAADHANDEL BV
Lactuca sativa L. · Lettuce
Syngenta, NL
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Lactuca sativa L. · Lettuce
ISI SEMENTI SPA
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lactuca sativa L. · Lettuce
Syngenta Seeds BV (NL)
Lactuca sativa L. · Lettuce
Syngenta Crop Protection AG
Lactuca sativa L. · Lettuce
Nunhems Netherlands B.V.
Lactuca sativa L. · Lettuce
Enza Zaden B.V.
Lactuca sativa L. · Lettuce
Nunhems B.V.
Lactuca sativa L. · Lettuce
Syngenta Seeds, NL
Lactuca sativa L. · Lettuce
Les Graines Caillard Sa (FR)
Lactuca sativa L. · Lettuce
Les Graines Caillard Sa (FR)
Lactuca sativa L. · Lettuce
NUNHEMS
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Lactuca sativa L. · Lettuce
Nunhems B.V., Nunhems B.V.
Lactuca sativa L. · Lettuce
Syngenta, NL
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Lactuca sativa L. · Lettuce
Agriculture and Agri-Food Canada
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Lactuca sativa L. · Lettuce
ENZA ZADEN
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.