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High external sucrose concentration inhibits the expansion of detached tomato fruits grown in a novel semi-open device Inra
Bussieres, P.; Bertin, N.; Morris, C.; Vigne, C.; Orlando, P.; Glaux, C.; Sevenier, V.; Floret, H.; Bernadac, J.; Korownikoff, S..
The effect of sap sucrose concentration on fruit expansion is poorly understood. We investigated the effects of sucrose concentration on growth of tomato fruits, detached from the plant after the cell multiplication phase. A semi-open device was built to grow detached fruits, where the fruit pedicel was immersed in a nutrient solution which was automatically replaced each day. About 22 d after anthesis, tomato fruits were harvested, disinfected in alcohol, and placed in the device with a sterile nutrient solution containing 5% sucrose. After about 1 wk, the sucrose concentration was either increased to 15% or maintained at 5%. The fruit expansion rate decreased when the sucrose concentration was increased, and after about 1 wk, these fruits weighed less...
Tipo: Journal Article Palavras-chave: FRUIT GROWTH; IN VITRO CULTURE; TOMATO FRUIT; SUCROSE; STERILE MEDIUM.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201129333f1d&uri=/notices/prodinra1/2011/06/
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Model-assisted analysis of tomato fruit growth in relation to carbon and water fluxes Inra
Liu, H.F.; Génard, M.; Guichard, S.; Bertin, N..
This work proposed a model of tomato growth adapted from the Fishman and Genard model developed to predict carbon and water accumulation in peach fruit. The main adaptations relied on the literature on tomato and mainly concerned: (i) the decrease in cell wall extensibility coefficient during fruit development; (ii) the increase in the membrane reflection coefficient to solute from 0 to 1, which accounted for the switch from symplasmic to apoplasmic phloem unloading, and (iii) the negative influence of the initial fruit weight on the maximum rate of active carbon uptake based on the assumption of higher competition for carbon among cells in large fruits containing more cells. A sensitivity analysis was performed and the model was calibrated and evaluated...
Tipo: Journal Article Palavras-chave: FLUX DE CARBONE; FLUX D'EAU; CROISSANCE DU FRUIT; CROISSANCE CELLULAIRE CARBON FLUX; CELL EXPANSION; FRUIT GROWTH; HUMIDITY; TOMATO; MODEL; WATER FLUX.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20084abe2ae1&uri=/notices/prodinra1/2009/11/
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