Browsing by Author "Navarro-Torre, Salvadora"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- Halotolerant endophytes promote grapevine regrowth after salt-induced defoliationPublication . Navarro-Torre, Salvadora; Ferrario, Sara; Caperta, Ana D.; Victorino, Gonçalo; Bailly, Marion; Sousa, Vicelina; Viegas, Wanda; Nogales, AmaiaSalinity is an important problem for agriculture in the Mediterranean area, and thus, it is essential to develop mitigation strategies to reduce its impact. The main objective of this study was to test the effectiveness of halotolerant plant growth-promoting bacteria (H-PGPB) in improving grapevine salt stress tolerance. Grapevines grafted onto a salt-sensitive rootstock were inoculated with a consortium of H-PGPB. The substrate of half of the plants of each treatment was salinized up to 2 dS m−1 . Plants grew for six days under these conditions, and afterward, NaCl was removed to assess plant recovery through growth, physiology, and canopy temperature measurements. Inoculation with H-PGPB had a positive effect on plant physiology, but after salt treatment, grapevines stopped their photosynthetic metabolism, leading to severe defoliation. Remarkably, after salt stress removal, inoculated plants re-sprouted faster, demonstrating that H-PGPB inoculation could be a good practice to increase vineyard resilience to salt stress
- Sustainable agricultural management of saline soils in arid and semi-arid Mediterranean regions through halophytes, microbial and soil-based technologiesPublication . Navarro-Torre, Salvadora; Garcia-Caparrós, Pedro; Nogales, Amaia; Abreu, Maria Manuela; Santos, Erika; Cortinhas, Ana Lúcia; Caperta, Ana DelaunaySoil salinization is an important global issue since marginal salt-affected soils have harmful consequences in agriculture and ecosystems. This article reviews different sustainable strategies adopted for marginal soil reclamation in Mediterranean climates. An innovative approach to soil salinity management includes a wide range of technologies, such as: phytoremediation, phytodesalination, vegetative bioremediation, amendments application and Technosols as well as inoculation with beneficial microorganisms like plant growth promoting bacteria and arbuscular mycorrhizal fungi. Besides that, the role of Mediterranean halophyte crops in acceler- ating salt-affected area’s recovery while providing food and feed, and beneficial halophilic microorganisms for new bioinoculant production, are discussed. We conclude that the combined use of plant, soil- and microbial- based technologies is a valuable option to relieve saline stress exposure and improve crops growth and yield in saline conditions.
- Unravelling the combined use of soil and microbial technologies to optimize cultivation of Halophyte Limonium algarvense (Plumbaginaceae) using saline soils and waterPublication . Nogales, Amaia; Navarro-Torre, Salvadora; Abreu, Maria Manuela; Santos, Erika S.; Cortinhas, Ana; Fors, Rosalba; Bailly, Marion; Róis, Ana Sofia; Caperta, Ana DelaunaySalt-affected soils have detrimental effects on agriculture and ecosystems. However, these soils can still be used for halophyte (salt-tolerant plants) cultivation using brackish and/or saline water. In this study, we employed soil technologies and mutualistic microorganisms as a sustainable strategy to improve the growth and reproduction of the halophyte Limonium algarvense Erben’s growth and reproduction under saline conditions. A microcosm assay was conducted under controlled greenhouse conditions to cultivate L. algarvense using a saline Fluvisol (FLU) amended—or not—with a Technosol (TEC). Plants were inoculated with the arbuscular mycorrhizal fungus (AMF) Rhizoglomus irregulare and/or a consortium of plant growth-promoting bacteria (PGPB), and they were irrigated with estuarine water. Soil enzyme analysis and physicochemical characterisation of the soils, collected at the beginning and at the end of the assay, were carried out. The physiological status of non-inoculated and inoculated plants was monitored during the assay for 4 months, and AMF root colonisation was evaluated. In FLU, only plants inoculated with the AMF survived. These plants had lower number of leaves, and shoot and root dry biomass than the ones grown in the TEC by the end of the assay. In the TEC, PGPB inoculation led to higher NDVI and PRI values, and AMF inoculation promoted higher reproductive development but not pollen fertility. The findings show that the combined use of soil and microbial technologies can be successfully applied to cultivate L. algarvense, suggesting their generalized use for other Limonium species with economic interest, while contributing to the sustainable use of marginal lands.