Influence of salinity and abscisic acid on the O2 uptake by N2-fixing nodules of common bean

• Published in: Biologia plantarum Vol. 50; no. 4; pp. 717 - 721
• Main Authors: Jebara, M, Harzalli-Jebara, S, Payre, H, Aouani, M.E, Drevon, J.J
• Format: Journal Article
• Language: English
• Published: 01.12.2006
• Subjects: ABA; BACTERIA FIJADORA DEL NITROGENO; BACTERIE FIXATRICE DE L'AZOTE; BROTES; CHLORURE DE SODIUM; CLORURO SODICO; CRECIMIENTO; CROISSANCE; ECHANGE GAZEUX; FIJACION DEL NITROGENO; FIXATION DE L'AZOTE; FRIJOL (PHASEOLUS); GAS EXCHANGE; GROWTH; HARICOT COMMUN; http://www.fao.org/aos/agrovoc#c_11098; http://www.fao.org/aos/agrovoc#c_14261; http://www.fao.org/aos/agrovoc#c_25446; http://www.fao.org/aos/agrovoc#c_27601; http://www.fao.org/aos/agrovoc#c_27939; http://www.fao.org/aos/agrovoc#c_28427; http://www.fao.org/aos/agrovoc#c_3; http://www.fao.org/aos/agrovoc#c_3394; http://www.fao.org/aos/agrovoc#c_4098; http://www.fao.org/aos/agrovoc#c_5196; http://www.fao.org/aos/agrovoc#c_5477; http://www.fao.org/aos/agrovoc#c_5767; http://www.fao.org/aos/agrovoc#c_6520; http://www.fao.org/aos/agrovoc#c_6563; http://www.fao.org/aos/agrovoc#c_6651; http://www.fao.org/aos/agrovoc#c_6751; http://www.fao.org/aos/agrovoc#c_7146; http://www.fao.org/aos/agrovoc#c_9421; INHIBICION; INHIBITION; INTERCAMBIO DE GASES; KIDNEY BEANS; NITROGEN FIXATION; NITROGEN FIXING BACTERIA; NODOSITE RACINAIRE; NUDOSIDADES RADICULARES; OXIGENO; OXYGEN; OXYGENE; PHASEOLUS VULGARIS; PLANT RESPONSE; POUSSE; RACINE; RAICES; REPONSE DE LA PLANTE; RESISTANCE AUX FACTEURS NUISIBLES; RESISTANCE TO INJURIOUS FACTORS; RESISTENCIA A AGENTES DANINOS; RESPIRACION; RESPIRATION; RESPUESTA DE LA PLANTA; RHIZOBIUM; ROOT NODULES; ROOTS; SALINIDAD; SALINITE; SALINITY; SHOOTS; SODIUM CHLORIDE
• ISSN: 0006-3134; 1573-8264
• DOI: 10.1007/s10535-006-0114-1

The effects of NaCl and ABA on the respiration of N2-fixing nodules were analysed in Phaseolus vulgaris inoculated with Rhizobium tropici, reference strain CIAT899. Shoot and nodule growth was more inhibited by NaCl than root growth. The O2 uptake by nodulated roots at 21 kPa O2 was significantly inhibited by salinity. Raising pO2 stimulated nodule respiration more under NaCl treatment than for the control, although it did not compensate totally for the inhibitory effect of NaCl. Short NaCl application was less destructive than long term application. Also, the external application of ABA inhibited nodule respiration, and this inhibition was partly compensated by raising pO2.