Volume 2 Numéro 1 (3)
12
novembre
2024
Effet de Glomus deserticola et Gigaspora margarita sur la croissance et la nutrition hydrique des jeunes plantes d’olivier (Olea europaea L. cv. Chetoui)
- Titre : Effet de Glomus deserticola et Gigaspora margarita sur la croissance et la nutrition hydrique des jeunes plantes d’olivier (Olea europaea L. cv. Chetoui)
- DOI: 10.71751/JAAOGv2i1y2023-1-11
- Auteur : Ameni BEN HASSENA; Lina TRABELSI; Mohamed ZOUARI; Wahid KHABOU; Nacim ZOUARI
- Abstract : Abuscular mycorrhizal fungi (AMF) may establish symbiotic associations with the roots of many plant species. The mycorrhizal symbiosis confer benefits to the hosts plant by improving the uptake of water and nutrients, which may consequently enhance their growth and development. In the present work, the effect of different AMF inoculums (Gigaspora margarita, Glomus deserticola,or a 1:1 mixture of G. margarita and G.deserticola) on the growth of young olive plants (Olea europaea L. cv. Chetoui) was studied. At the end of the experimental period (one year), the potted mycorrhizal olive plants showed a significant increase in the shoot elongation, the number of newly-produced leaves and the leaf area, as compared to the control ones. In addition, an enhancement in fresh and dry biomass was observed in inoculated young olive plants. This beneficial effect of mycorrhizal symbiosis was attributed to the better acquisition of water and nutrients in mycorrhizal olive plants, particularly in plants inoculated by the mixture of G. margarita and G. deserticola.
- Pagination : 1-11
12
novembre
2024
Water accounting for food security: the case of rainfed and irrigated olive growing in arid regions in Tunisia
- Titre : Water accounting for food security: the case of rainfed and irrigated olive growing in arid regions in Tunisia
- DOI : 10.71751/JAAOGv2i1y2023-12-26
- Auteur : Saida Elfkih; Saker Ben Abdallah; Amel Elkadri
- Abstract :Food and water security become challenging goals in many regions due to biophysical, socio-economic and political conditions, often amplified by climate change and other crises. In this perspective, accounting water is a crucial tool to understand the overall tendency of water consumption and to assist the decision makers in their decisional process about water and crops allocations. In this optic, the present paper aims to undertake a comparative analysis of the water use and conception in the irrigated and rainfed olive growing systems; based on an integrated method combining three key concepts of water computation: virtual water, water footprint and water productivity. The study focuses on a sample of 45 farms of irrigated and rainfed olive growing system located in Medenine and Sfax regions in Tunisia which are characterized by a semi-arid and arid climate conditions. Results show the importance of the theoretical framework adopted in clarifying the state of water consumption in a strategic sector such as the Tunisian olive growing. In addition, the different calculated indicators highlight the importance of the application of a whole technical package and a controlled and efficient use of water to improve the economic profitability of olive cultivation. Finally, the study highlights also the necessity to revise the irrigated olive growing extensions’ policies under arid conditions and to orient and sensitize farms to apply complementary irrigation in critical phases of the tree.
- Pagination : 12-26
12
novembre
2024
Morphological and molecular characterization of minor olive (Olea europaea. L) cultivars in Tunisia
- Titre : Morphological and molecular characterization of minor olive (Olea europaea. L) cultivars in Tunisia
- DOI: 10.71751/JAAOGv2i1y2023-27-37
- Auteur : Hana Souabni; Fathi Ben Amar; Yolanda Gogorcena; Mahdi Fendri; Sameh Mnasri; Mohamed Ali Triki; Olfa Saddoud Debbabi
- Abstract : Management of ex situ olive collection is crucial for suitable genetic resources conservation. This study aims to complement characterization of olive accessions belonging to the National olive germplasm collection located in the south of Tunisia. The morphological characterization of endocarp of 22 Tunisian cultivars was made. Multiple component analysis (MCA) showed 5 different groups of cultivars and one case of synonymy. A set of six Simple Sequence Repeat markers (SSR) were used to fingerprinting the cultivars studied. The total number of alleles was 44 with a mean of 7.33 alleles/locus. The polymorphism information content (PIC) varied from 0.45 for DCA 03 to 0.85 for DCA 16 with a mean of 0.7. The Principal Component Analysis (PCoA) was used to cluster cultivars. We assume the power of the microsatellite markers and the phenotypic richness of our local germplasm in Tunisia.
- Pagination : 27-37
