Analysis of leaves chloride accumulation and phenotypic behavior of nine trifoliate citrus rootstocks under salt stress conditions : [P218]

Benyahia Hamid, Beniken Lhou, Benazzouz Abdelkader, Talha Abdelhak, Curk Franck, Jacquemond Camille, Ollitrault Patrick. 2008. Analysis of leaves chloride accumulation and phenotypic behavior of nine trifoliate citrus rootstocks under salt stress conditions : [P218]. In : XIth International Congress Citrus, book of abstracts, Wuhan, China, 26-30 october 2008. s.l. : s.n., Résumé, 191. International Citrus Congress. 11, Wuhan, Chine, 26 Octobre 2008/30 Octobre 2008.

Résumé : Citrus in Morocco is mainly grafted on sour orange (Citrus aurantium L.) rootstock which should be abandoned due to its susceptibility to citrus tristeza virus (CTV). Salinity also becomes a serious problem in citrus growing areas of Morocco. The choice of the right rootstock is the most practical means to overcome the problem. Poncirus trifoliata (L.) Raf. and several of its hybrids (citrange, citrumello, citrandarin) are known to be tolerant to CTV. The purpose of the present work was to evaluate nine trifoliate citrus rootstocks, introduced in 1996 from San Giuliano Inra-Cirad Agronomic Research Station, Corsica France, for their behavior against salt stress. Seedlings of nine citrus rootstocks were evaluated for their leaf chloride accumulation under salt conditions. This study was carried out in greenhouse conditions at Inra Experimental station El Menzeh, Morecco. Three-month-old plants were grown. in 0.5 liter containers of sand and peat moss in proportion of 2/3 or 1/3 (v/v), and irrigated four times per week and fertilized with complete nutritional solution. NaCI at 0 (control), 2 and 5 g/l was added to the watering solution for 2 additional months. Ali rootstocks showed specific symptoms of toxicity when irrigated with NaCI solution. The severity of symptoms increased with time and salt concentration and varied between rootstocks. Diverse effects of salt stress on stem. leaves and roots fresh and dry weights were also observed according to the rootstock genotype. Rootstock leaf analysis revealed that accumulation of chloride, varied in relation with the rootstocks genotype and salt concentration. The relations between the different parameters analyzed are discussed and a standardized method for hybrids population screening proposed. Among the nine trifoliate hybrids tested Citrauge C35 (ICVN 0110177), Citnunelo Sacaton (ICVN 0110144) and Troyer citrange (ICVN 0110197) have been identified, in our experimental conditions as the less sensitive to salt stress. (Texte intégral)

Mots-clés Agrovoc : Citrus

Mots-clés géographiques Agrovoc : Corse, Maroc, France

Classification Agris : F62 - Physiologie végétale - Croissance et développement
F30 - Génétique et amélioration des plantes
H50 - Troubles divers des plantes

Auteurs et affiliations

• Benyahia Hamid, INRA [Maroc] (MAR)
• Beniken Lhou, INRA [Maroc] (MAR)
• Benazzouz Abdelkader, INRA [Maroc] (MAR)
• Talha Abdelhak, INRA [Maroc] (MAR)
• Curk Franck, INRA (FRA)
• Jacquemond Camille, INRA (FRA)
• Ollitrault Patrick, CIRAD-BIOS-UPR Multiplication végétative (ESP) ORCID: 0000-0002-9456-5517

Source : Cirad - Agritrop (https://agritrop.cirad.fr/548801/)

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