Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Canada → Variation for whole plant water use efficiency and leaf-level traits affecting drought tolerance in soybean

University of Guelph (2011)

Variation for whole plant water use efficiency and leaf-level traits affecting drought tolerance in soybean

Farid, Mehdi

Titre : Variation for whole plant water use efficiency and leaf-level traits affecting drought tolerance in soybean

Auteur : Farid, Mehdi

Université de soutenance : University of Guelph

Grade : Master of Science (MS) 2011

Résumé
Genotypic variation for water use efficiency and a correlated leaf-level trait, the dark-adapted leaf epidermal conductance (gdark ) has been previously identified among soybean cultivars adapted to Ontario, Canada. In the present work, parents of existing soybean mapping populations were screened for variation in these two traits to identify populations that would be suitable for identifying chromosomal regions controlling the traits. Second, a comparison of greenhouse and field data demonstrated that greenhouse screening experiments could predict cultivar differences for g dark in the field, but only when plants in the greenhouse were grown under a cyclic drought treatment. Third, greenhouse experiments were conducted to examine restrictions to photosynthesis in six soybean cultivars during recovery from drought stress. No treatment by cultivar interactions were found. Compared to control plants, drought-stressed plants showed residual limitations to photosynthesis 24 h after rewatering. The lower photosynthetic rates were primarily caused by reduced mesophyll conductance.

Présentation (Amicus)

Version intégrale

Page publiée le 21 mai 2012, mise à jour le 8 février 2018