par Havaux, Michel C. 
;Ernez, Mohamed ;Lannoye, Robert
Référence Journal of plant physiology, 133, 5, page (555-560)
Publication Publié, 1988
;Ernez, Mohamed ;Lannoye, Robert Référence Journal of plant physiology, 133, 5, page (555-560)
Publication Publié, 1988
Article révisé par les pairs
| Résumé : | Drought and heat tolerances were measured in intact leaves of a large number of genotypes of durum wheat (Triticum durum Desf.), barley (Hordeum vulgare L.) and triticale (Triticum durum L. × Secale cereale L.) using rapid in vivo chlorophyll fluorescence tests. The high temperature (Tp) corresponding to maximal Fo -fluorescence in leaf samples heated at a rate of 1 ưC min−1 was used to estimate the relative heat tolerance. On the other hand, drought tolerance was measured by the reduction of the photochemical quenching of chlorophyll fluorescence (qQ) after a short desiccation treatment. The data indicate a very wide range of genotypic adaptation to drought and heat in cereals. The two types of tolerance were, however, closely related: the most heat tolerant cereal varieties were also the most drought tolerant ones. The results presented in this paper also provide a good example of the usefulness and the simplicity of modulated chlorophyll fluorescence measurements as rapid screening tests for stress tolerance in crop plants. © 1988, Gustav Fischer Verlag, Stuttgart. All rights reserved. |
