Effect of the halophytic grass Sporobolus robustus Kunth as a potential nurse plant on the germination and establishment of Vachellia seyal and Prosopis juliflora under saline conditions

Fall Fatoumata, Bakhoum Niokhor, Diouf Diégane, Fall Dioumacor, Le Roux Christine, Bâ Amadou Moustapha. 2021. Effect of the halophytic grass Sporobolus robustus Kunth as a potential nurse plant on the germination and establishment of Vachellia seyal and Prosopis juliflora under saline conditions. Arid Land Research and Management, 35 (2) : 246-250.

Quartile : Q3, Sujet : SOIL SCIENCE / Quartile : Q4, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Here, we tested the hypothesis that the halophytic grass Sporobolus robustus acts as a nurse plant by enhancing the germination, growth, survival, mycorhization and soil mycorrhizal potential of Vachellia seyal and Prosopis juliflora, and reducing soil salinity. Seeds of each legume were sown 3 cm from a 5-month-old tussock of S. robustus (+) or without S. robustus (−) as a control in a saline soil under greenhouse conditions. Seedlings of each legume were also individually planted 3 cm from a tussock of S. robustus (+) or without S. robustus (−). Sporobolus robustus (+) treatment improved the germination rate for P. juliflora (from 37 to 47%) and for V. seyal (from 23 to 43%). Furthemore, the S. robustus (+) treatment significantly increased P. juliflora and V. seyal seedlings survival (82 and 50%, respectively), mycorrhizal colonization (33 and 35-fold, respectively) and soil mycorrhizal potential (11 and 22-fold, respectively) compared to the control, whereas, no significant effect of S. robustus was observed on the growth parameters of either set of seedlings. Moreover, S. robustus (+) significantly reduced only the salinity of the rhizosphere for V. seyal. Sporobolus robustus could act as a nurse plant to facilitate establishment of both legumes in saline environments.

Mots-clés Agrovoc : plante de culture associée, Prosopis juliflora, mycorhize arbusculaire, sol salin, germination, établissement de la plante, lutte antisalinité, mycorhization

Mots-clés complémentaires : Sporobolus robustus, Vachellia seyal

Mots-clés libres : Arbuscular mycorrhizal fungi, Facilitation, Legumes, Salinity, Survival

Classification Agris : F01 - Culture des plantes
F60 - Physiologie et biochimie végétale
F08 - Systèmes et modes de culture
F62 - Physiologie végétale - Croissance et développement

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

Auteurs et affiliations

• Fall Fatoumata, IRD (SEN) - auteur correspondant
• Bakhoum Niokhor, IRD (SEN)
• Diouf Diégane, IRD (SEN)
• Fall Dioumacor, CNRA (SEN)
• Le Roux Christine, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0003-0668-3589
• Bâ Amadou Moustapha, UAG (GLP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/597060/)

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