Moderate salinity stimulates root plasticity and growth parameters of date palm seedlings (Phoenix dactylifera L.)

Mimoun Asmâa, Rey Hervé, Jourdan Christophe, Banamar Houari, Yakoubi Fatima, Babou Fatima, Bennaceur Malika. 2024. Moderate salinity stimulates root plasticity and growth parameters of date palm seedlings (Phoenix dactylifera L.). Rhizosphere, 30:100876, 11 p.

Résumé : One-year-old date palm seedlings (Phoenix dactylifera L.) were studied to assess the impact of salinity on root system architecture and biochemical parameters. Saline water was used for irrigation, and a year-long analysis was conducted. Continuous monitoring in rhizotrons revealed increased root growth, lateral root production, and enhanced protein, chlorophyll, and carotenoid production at 100 mM NaCl. However, soluble sugar content decreased. At 200 mM NaCl, root length, lateral roots, and various biochemical parameters decreased significantly, except for proline, which accumulated, suggesting osmoregulation. These findings highlight that moderate salinity stimulates growth and biochemical functions, while higher salinity levels adversely affect these parameters, with proline serving as a crucial osmoregulatory component in date palm seedlings under salt stress.

Mots-clés Agrovoc : tolérance au sel, système racinaire, Phoenix dactylifera, stress osmotique, caroténoïde, croissance, salinité du sol, racine, physiologie végétale, plantule

Mots-clés géographiques Agrovoc : Algérie

Mots-clés libres : Root architecture, Lateral root, Soluble sugars, Proline, Photosynthesis

Auteurs et affiliations

• Mimoun Asmâa, Université d'Oran (DZA) - auteur correspondant
• Rey Hervé
• Jourdan Christophe, CIRAD-PERSYST-UMR Eco&Sols (FRA) ORCID: 0000-0001-9857-3269
• Banamar Houari, Université d'Oran (DZA)
• Yakoubi Fatima, Université d'Oran (DZA)
• Babou Fatima, Université d'Oran (DZA)
• Bennaceur Malika, Université d'Oran (DZA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/612445/)

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