Inhibitors of Na/H Antiporter and Cation‑Chloride‑Cotransporters Have Contrasting Efects on Two Cultivars of Oryza glaberrima Steud. Difering in Salinity Resistance

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AuteurPRODJINOTO, HERMANN
AuteurIRAKOZE, WILLY
AuteurGANDONOU, GBOSSEGNON CHRISTOPHE BERNARD
AuteurLUTTS, STANLEY
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2021
ResumeA pharmacological study was conducted to analyze the impact of inhibitors of Na+-H+ antiporters (amiloride 100 µM) and cation-chloride-cotransporters (bumetanide 200 µM) on two cultivars of the African rice species (Oryza glaberrima Steud) difering in salt resistance (TOG5307: salt-resistant and TOG5949: salt-sensitive) exposed to 75 mM NaCl during 3 days. Amiloride increased Na+ accumulation in roots and leaves to a higher extent in salt-resistant TOG5307 than in salt-sensitive TOG5949. Bumetanide reduced Cl− accumulation in both cultivars as well as K+ accumulation in TOG5307 and Na+ accumulation in TOG5949, suggesting that the cation-chloride-cotransporter in O. glaberrima does not necessarily strictly behave as a Na+:K+:2Cl− transporter. Inhibitors mainly acted on the absorption step but had low impact on root-to-shoot translocation process. The salt-resistant cultivar TOG5307 was able to efciently regulate Na+ uptake and to cope with high concentration of accumulated toxic ions, as demonstrated by a higher cell viability index and a higher concentration of protein and photosynthetic pigments in NaCl-exposed plants comparatively to salt-sensitive TOG5949
DOI10.1007/s42729-021-00603-z
Autre identifiantBECDB-13479
URIhttps://dspace.uac.bj/handle/123456789/11543
Languefr
Fait partie deJournal of Soil Science and Plant Nutrition
SujetAfrican rice · Ion accumulation · Mineral nutrition · NaCl · Salinity · Senescence
TitreInhibitors of Na/H Antiporter and Cation‑Chloride‑Cotransporters Have Contrasting Efects on Two Cultivars of Oryza glaberrima Steud. Difering in Salinity Resistance
TypeArticle

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