|Author:||Cuartero, J. ; Gomez-Guillamon, M. L. ; Romero-Aranda, R. ; Reina-Sanchez, A. ; Caro, M. ; Perez-Alfocea, F. ; Bolarín, M.C.|
|Book Group Author:||NA|
Effects of salinity on tomato fruit yield, on fruit quality and on plant water uptake were quantified experimentally under greenhouse and soil-less cultivation with 4 cultivars and 4 salinity levels (viz. 0, 25, 50 and 75 mM NaCl). Fruit represented 77% of plant fresh weight, leaves 22% and stems 2%. Fruit were the most sensitive part of the plant in relation to salinity, with the 4 cultivars showing significant fruit yield reduction (62% average, at a rate found to be 28gm per mM increase in salinity). However, plants grown in salty conditions (75 mM) consumed 47 % less water than control (depending on the cultivar). As the reduction in productivity was found to be small relative to the increase in soluble solids, low salinities can be used to increase fruit soluble solids per unit area (for processing tomatoes). Salinity enhances fruit taste by increasing both sugars and acids, but can produce too much acid. Seedling pre-treatment with a drought strategy (-1 Mpa) or a 50% field salinity strategy could be applied for tomato plants grown in saline soils or irrigated with saline water. The stress level necessary to trigger the adaptive response seems to be related to the degree of tolerance of the genotype. Mist applied to tomato plants grown in Mediterranean greenhouse conditions was found to improve vegetative growth and yield because of increased leaf gas exchange and leaf water status, and of decreased Na concentration in leaves.
crop quality, crop yield, cultivars, drought, fruitvegetables, gas exchange, genotypes, greenhouses, irrigation water, leafwater potential, leaves, plant composition, plant water relations,pretreatment, protected cultivation, saline soils, saline water,salinity, salt tolerance, seedling stage, soilless culture, stems, sugarcontent, taste, tomatoes, water quality, water use efficiency,Mediterranean Region, Spain, Lycopersicon esculentum, Lycopersicon,Solanaceae, Solanales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, Southern Europe, Europe, Mediterranean Region, DevelopedCountries, European Union Countries, OECD Countries, chemicalconstituents of plants, cultivated varieties, cultivation under glass orplastic, glasshouses, Mediterranean countries, salt water, watercomposition and quality, Environmental Tolerance of Plants (FF900),Horticultural Crops (FF003) (New March 2000), Soil Fertility (JJ600),Soil Water Management (Irrigation and Drainage) (JJ800) (R