Limited-transpiration trait in response to high vapor pressure deficit from wild to cultivated species: study of the Lens genus

Rouichi Salma, Idrissi Omar, Sohail Quahir, Marrou Hélène, Sinclair Thomas R., Hejjaoui Kamal, Amri Moez, Ghanem Michel Edmond. 2023. Limited-transpiration trait in response to high vapor pressure deficit from wild to cultivated species: study of the Lens genus. Journal of Experimental Botany, 74 (16) : 4875-4887.

Résumé : Lentil (Lens culinaris Medik.) is commonly grown in drought-prone areas where terminal heat and drought are frequent. The limited-transpiration (TRlim) trait under high vapor pressure deficit (VPD) could be a way to conserve water and increase yield under water deficit conditions. The TRlim trait was examined in cultivated and wild lentil species together with its evolution throughout the breeding pipeline. Sixty-one accessions representing the six wild lentil species (L. orientalis, L. tomentosus, L. odemensis, L. lamottei, L. ervoides, and L. nigricans) and 13 interspecific advanced lines were evaluated in their transpiration response to high VPD. A large variation in transpiration rate (TR) response to increased VPD was recorded among wild lentil accessions, with 43 accessions exhibiting a breakpoint (BP) in their TR response to increasing VPD, with values ranging from 0.92 kPa to 3.38 kPa under greenhouse conditions. Ten genotypes for the interspecific advanced lines displayed a BP with an average of 1.95 kPa, much lower than previously reported for cultivated lentil. Results from field experiments suggest that the TRlim trait (BP=0.97 kPa) positively affected yield and yield-related parameters during the years with late-season water stress. The selection of TRlim genotypes for high VPD environments could improve lentil productivity in drought-prone areas.

Mots-clés Agrovoc : Lens culinaris, conservation de l'eau, génotype, stress dû à la sécheresse, lentille, pratique culturale

Mots-clés libres : Drought, Interspecific crosses, Lentil, Transpiration limitation, Vapor pressure deficit (VPD), Wild relatives

Classification Agris : F60 - Physiologie et biochimie végétale
F30 - Génétique et amélioration des plantes
H50 - Troubles divers des plantes

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Projets sur financement : (FRA) Towards Resilient and Sustainable Integrated Agro-ecosystems Through Appropriate Climate-Smart Farming Practices

Auteurs et affiliations

• Rouichi Salma, CIRAD-BIOS-UMR AGAP (FRA)
• Idrissi Omar, National Institute of Agricultural Research (MAR)
• Sohail Quahir, Mohammed VI Polytechnic University (MAR)
• Marrou Hélène, Montpellier SupAgro (FRA)
• Sinclair Thomas R., North Carolina State University (USA)
• Hejjaoui Kamal, Mohammed VI Polytechnic University (MAR)
• Amri Moez, Mohammed VI Polytechnic University (MAR)
• Ghanem Michel Edmond, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-0626-7622 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606699/)

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