Water Fluxes and Growth of Greenhouse Tomato Fruits Under Summer Conditions

Guichard, S.; Gary, Christian; Longuenesse, Jean Jacques; Leonardi, C.

doi:10.17660/actahortic.1999.507.26

Cited by 35 publications

(20 citation statements)

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“…Indeed their data indicated a correlation between changes in fruit diameter and the water potential gradient from stem to fruit. This was confirmed by Guichard et al (1999).…”

supporting

confidence: 60%

“…Similarly, the flow of water from stem to leaves and to fruits depends on the gradient of water potential and the hydraulic architecture and resistance between these organs. Johnson et al (1992) observed that water demand for fruit transpiration was some 10% of daily water import into fruits and Guichard et al, 1999, found the transpiration flux was of the same order of magnitude as the xylem contribution to the daily fruit growth. Hence water demand for fruit transpiration is small compared with fruit growth.…”

mentioning

confidence: 99%

“…Water transport into tomato fruits is mainly through the phloem (Ho et al, 1987;Lee, 1989;Guichard et al, 1999). The driving force for phloem translocation is the turgor pressure gradient in the phloem sieve tubes rather than the apoplasic water potential gradient.…”

mentioning

confidence: 99%

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Plant water relations as affected by osmotic potential of the nutrient solution and potential transpiration in tomato (Lycopersicon esculentumMill.)

Marcelis²,

Stanghellini

2004

The Journal of Horticultural Science and Biotechnology

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“…Indeed their data indicated a correlation between changes in fruit diameter and the water potential gradient from stem to fruit. This was confirmed by Guichard et al (1999).…”

supporting

confidence: 60%

mentioning

confidence: 99%

See 1 more Smart Citation

Plant water relations as affected by osmotic potential of the nutrient solution and potential transpiration in tomato (Lycopersicon esculentumMill.)

Marcelis²,

Stanghellini

2004

The Journal of Horticultural Science and Biotechnology

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“…Stem water potential, as compared with fruit water potential, is more variable with changes in root water condition and evaporative demand. Under the respective conditions of water deficit, high salinity and high evaporative demand, stem water potentials lower than fruit water potential have been considered to induce sap backflow from fruits through xylem that sometimes leads to fruit shrinkage (Johnson et al, 1992;Pearce et al, 1993;Kitano et al, 1996b;Guichard et al, 1999). In this study, although the fruit shrinkage did not occur under water deficit, the occurrence of xylem sap backflow was quantitatively estimated by the evaluation of fruit water balance.…”

Section: (72)mentioning

confidence: 87%

Dynamic Analysis of Growth, Water Balance and Sap Fluxes through Phloem and Xylem in a Tomato Fruit: Short-term Effect of Water Stress

Araki

Eguchi

Wajima

et al. 2004

ecb

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In order to examine the short-term response of tomato (Lycopersicon esculentum Mill.) plants to water stress, we investigated the dynamics of fruit growth and water balance in growing fruits under the well-watered and the water deficit conditions.Under the well-watered condition, most (84%) of pedicel sap flux toward the fruit contributed to fruit expansion, and the residual (i.e. only 16%) was lost by transpiration from the fruit and its calyx. The most dominant component of the fruit water balance was the phloem sap flux, since a major part (i.e. 70%) of the sap delivered into the fruit was brought by phloem transport.On the other hand, xylem transport made a lesser contribution to the fruit expansion and exhibited larger susceptibleness to water stress. Under the water deficit condition, the fruit growth rate was depressed to 36% of well-watered plants, while phloem sap influx to the fruit was less affected. Xylem sap backflow occurred frequently under the water deficit condition, and the net influx of xylem sap during the whole day was nearly zero. The phloem transport solely sustained the fruit growth under water stress. This study quantitatively demonstrated that water deficit results in smaller fruits with higher sugar concentrations through different responses of phloem and xylem transport to water stress.

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“…Some authors (Leonardi et al 2000b;Dorais et al 2001a) found that greenhouse tomato fruit had a more intense colouration when plants were grown under a high VPD, which suggests a higher lycopene concentration possibly due to a sub-optimal plant water status. It is also possible that a reduction in the net accumulation of water in fruit subjected to high VPD (Guichard et al 1999) may concentrate health promoting phytochemicals in the fruit.…”

Section: Co 2 and Vpdmentioning

confidence: 99%

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

2008

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It is widely accepted that a healthy diet is an important factor in preventing chronic diseases, and in improving energy balance and weight management. Studies have shown strong inverse correlations between tomato consumption and the risk of certain types of cancer, cardiovascular diseases and age-related macular degeneration. Because tomato is the second-most important vegetable in the world after potato, this horticultural crop constitutes an excellent source of health-promoting compounds due to the balanced mixture of minerals and antioxidants including vitamins C and E, lycopene, b-carotene, lutein and flavonoids such as quercetin. Improvement in phytonutrients in tomatoes can be achieved by cultivar selection, environmental factors, agronomic practices, stage of ripeness at harvest, and appropriate handling and conditioning all the way from the field to the consumer. The purpose of this paper is to review the recent literature of the main factors that can improve the nutritional quality of tomato and consequently their beneficial role in human diet. The importance of genotype selection and the optimization of environmental conditions (light, temperature, humidity, atmospheric CO 2 and air pollutants) for high nutritional value is outlined first, followed by the optimization of agricultural practices (soil properties, water quality, mineral nutrition, salinity, grafting, pruning, growing systems, growth promoters, maturity, and mechanical and pest injuries). The review concludes by identifying several prospects for future research such as modelling and genetic engineering of the nutritional value of tomato.

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Water Fluxes and Growth of Greenhouse Tomato Fruits Under Summer Conditions

Cited by 35 publications

References 0 publications

Plant water relations as affected by osmotic potential of the nutrient solution and potential transpiration in tomato (Lycopersicon esculentumMill.)

Plant water relations as affected by osmotic potential of the nutrient solution and potential transpiration in tomato (Lycopersicon esculentumMill.)

Dynamic Analysis of Growth, Water Balance and Sap Fluxes through Phloem and Xylem in a Tomato Fruit: Short-term Effect of Water Stress

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

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