Effects of NaCl and mannitol induced stress on sugarcane (Saccharum sp.) callus cultures

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AuteurERRABII, TOMADER
AuteurGANDONOU, GBOSSEGNON CHRISTOPHE BERNARD
AuteurESSALMANI, HAYAT
AuteurABRINI, JAMAL
AuteurIDAOMAR, MOHAMED
AuteurSKALI SENHAJI, NADIA
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2007
ResumeThe effects of NaCl and mannitol iso-osmotic stresses on calli issued from sugarcane cultivars (cvs.) R570, CP59-73 and NCo310 were investigated in relation to callus growth, water content, ion and proline concentrations. Callus growth and water content decreased under both stresses with the highest reduction under mannitol-induced osmotic stress. The ion concentration was drastically affected after exposure to NaCl and mannitol. Salt stress induced an increase in Na+ and Cl– accumulation and a decrease inK+ and Ca2+ concentrations. Under mannitol-induced osmotic stress, K+ and Ca2+ concentrations decreased significantly while Na+ and Cl– concentrations remained unchanged. Free proline accumulation occurred under both stresses and was more marked in stress-sensitive cv. than in stress-resistant one. Our results indicated that the physiological mechanisms operating at the plant cell level in response to salt- and osmotic-induced stress in sugarcane cvs. are different. Among the cvs., we concluded that the stress resistance is closely related to the maintain of an adequate water status and a high level of K+ and Ca2+ under both stresses and a low level of Na+ concentration in the presence of NaCl. Thus, sugarcane (Saccharum sp.) can be regarded as a Na+ excluder. We also provided evidence that proline accumulation is a stress-sensitive trait rather than a stress resistance marker.
Autre identifiantBECDB-1948
URIhttps://dspace.uac.bj/handle/123456789/2020
Languefr
Fait partie deActa Physologia Plantarum
SujetSugarcane (Saccharum sp.) NaCl Mannitol Callus growth Ion uptake Proline
TitreEffects of NaCl and mannitol induced stress on sugarcane (Saccharum sp.) callus cultures
TypeArticle

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