Search results for " Vapor pressure deficit"

showing 3 items of 3 documents

Comparative responses of ‘Gala’ and ‘Fuji’ apple trees to deficit irrigation: Placement versus volume effects

2012

Aims: Climate, soil water potential (SWP), leaf relative water content (RWC), stomatal conductance (gs), fruit and shoot growth, and carbohydrate levels were monitored during the 2008 and 2009 growing seasons to study the responses of 'Gala' and 'Fuji' apple trees to irrigation placement or volume. Methods: Three irrigation treatments were imposed, conventional irrigation (CI), partial root-zone drying (PRD, 50% of CI water on one side of the root-zone, which was alternated periodically), and continuous deficit irrigation (DI, 50% of CI water on both sides of the root-zone). Results: After each irrigation season, DI generated twice the soil water deficit (SWDint) than PRD (average of dry an…

Carbohydrates Partial root-zone drying Relative water content Soil water potential Stomatal conductance Vapor pressure deficitStomatal conductanceIrrigationVapour Pressure DeficitChemistryDeficit irrigationSoil ScienceGrowing seasonPlant ScienceSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeWater potentialAgronomyShootWater contentPlant and Soil
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Diurnal Regulation of Leaf Water Status in High- and Low-Mannitol Olive Cultivars

2014

The role of mannitol and malic acid in the regulation of diurnal leaf water relations was investigated in ‘Biancolilla’ (high-mannitol) and ‘Cerasuola’ (low-mannitol) olive trees. Photosynthetic photon flux density (PPFD), vapor pressure deficit (VPD), stomatal conductance (gs), transpiration rate (T), relative water content (RWC), mannitol and malic acid were measured in ‘Biancolilla’ and ‘Cerasuola’ leaves during a dry and hot day of summer in Sicily. In general, leaves of ‘Biancolilla’ trees exhibited greater mannitol content, higher gs and T, but lower RWC than leaves of ‘Cerasuola’ trees. Differences in gs and T between the two cultivars were evident mainly in mid to late morning. ‘Bia…

Stomatal conductancemalate; polyol; relative water content; stomatal conductance; transpiration; vapor pressure deficitVapour Pressure DeficitPlant ScienceArticletranspirationchemistry.chemical_compoundmedicineCultivarWater contentEcology Evolution Behavior and SystematicsTranspirationmalateEcologyrelative water contentvapor pressure deficitBotanyOlive treesSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeHorticulturechemistrystomatal conductanceQK1-989polyolMannitolMalic acidmedicine.drugPlants; Volume 3; Issue 2; Pages: 196-208
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Recurrent deficit irrigation and fruit harvest affect tree water relations and fruitlet growth in ‘valencia’ orange

2019

Background – Partial rootzone drying is an irrigation strategy known for increasing water use efficiency without significantly affecting tree water status. ‘Valencia’ oranges have a very long development period and nearly mature fruit and new fruitlets may be present at the same time on the tree, competing for water and assimilates. Objectives – The present study investigates the effect of recurrent deficit irrigation and fruit harvest on tree water status and fruitlet growth of ‘Valencia’ orange. Methods – Forty-eight adult trees were exposed to three irrigation treatments for seven years (2007–2013): irrigation with 100% of ETc (CI), continuous deficit irrigation (DI, 50% of CI) and parti…

Citrus sinensis fruit gauges partial rootzone drying sap flow stem water potential vapor pressure deficitDeficit irrigationStem water potentialHorticultureBiologyAffect (psychology)Valencia orangefood.foodVapor pressure deficitSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreePartial root-zone dryingTree (data structure)HorticulturefoodSap flowFruit gaugeCitrus sinensiEuropean Journal of Horticultural Science
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