Carbohydrate Metabolism in the Tomato Fruit as Affected by Pollination, Fertilization and Application of Growth Regulators

Marrè, E.; Murneek, A. E.

doi:10.1104/pp.28.2.255

Cited by 31 publications

(11 citation statements)

References 18 publications

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“…Previous studies reported that climacteric fruits, in particular, may show considerable changes in sugar content during ripening. [19][20][21][22]15] Our results are in agreement with previous reported increase in reducing and total sugars from green to ripe stages.…”

Section: Aciditysupporting

confidence: 91%

Physicochemical Changes in Seven Tomato (Lycopersicon esculentum) Cultivars During Ripening

Kaur

Sharma

Wani

et al. 2006

International Journal of Food Properties

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Seven tomato cultivars were studied for compositional changes during ripening at green, breaker, turner, and ripe stages. Result indicated changes in total soluble solids (4.15 to 6.62 g/100 g), acidity (0.36 to 0.54 g/100 g), reducing sugars (0.76 to 4.04 g/100 g), total sugars (1.67 to 5.52 g/100 g), lycopene in skin (0.07 to 14.28 mg/100 g), and in pulp (0.04 to 6.73 mg/ 100 g) during ripening from green to red ripe stage. Cultivar UC-828 was found superior with respect to total soluble solids (6.62 g/100 g), reducing sugars (4.04 g/100 g), and total sugars (5.52 g/100 g) where as cultivar 8-2-1-2-5 was found superior with respect to lycopene in skin (14.28 mg/100 g) and in pulp (6.73 mg/100 g). Hunter color values showed a change from negative value of 'a' (greenness) to positive values (redness) where as 'b' decreased. The (b/a) and tan −1 (b/a) showed a similar pattern of first increased and then decreased. The puncture resistance was decreased from 10.5 to 2.3 N indicating softening during ripening. Correlation studies showed that lycopene content best correlated with Hunter 'a' values during ripening (R 2 = 0.84 to 0.93). Intercultivar variation in physicochemical parameters at all stages of ripening revealed that Castle Rock was the best cultivar.

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Section: Aciditysupporting

confidence: 91%

Physicochemical Changes in Seven Tomato (Lycopersicon esculentum) Cultivars During Ripening

Kaur

Sharma

Wani

et al. 2006

International Journal of Food Properties

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“…It appears that the increased levels of cytokinin and auxin stimulate cell division and thus initiate fruit growth . On the other hand, by the third day after pollination, the level of both reducing sugars and starch increases but that of sucrose decreases [29] . This change may be the driving force providing energy to maintain initial fruit growth .…”

Section: Fruit Set and Fruit Growth Potentialmentioning

confidence: 99%

Partitioning of assimilates in fruiting tomato plants

Ho¹

1984

Plant Growth Regul

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Tomato is a potentially high-yield crop with a harvest index of about 65% . During fruiting, fruit growth accounts for 80 to 90% of the plant fresh weight gain and fruits are therefore the strongest sinks for assimilate .At initiation, an inflorescence is a weak sink in comparison with apical shoots . When assimilate supply is inadequate, the inflorescence has a reduced level of endogenous cytokinin and the degree of abortion is inversely related to the activity of sucrose hydrolase . Application of cytokinin plus gibberellins to the inflorescence increases its capacity to attract assimilate at the expense of apical shoots .At fruit set, cell division is activated and the ovary starts to accumulate reducing sugars and starch . Both the final cell number and the potential cell size are determined in the first two weeks and may be related to the levels of cytokinin and auxin .At the early stage of rapid growth a fruit accumulates imported assimilates, mainly in the forms of hexoses and starch . The rate of starch accumulation increases with the absolute fruit growth rate and affects the final soluble solids content of a fruit . The change in the fruit growth rate during fruit development does not coincide with the changes in the endogenous hormone levels of the fruit . A fruit competes for assimilate with others mainly in the same truss.

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“…Walker and Thomley (18) reported a negative relationship be tween sucrose levels in the tomato fruit and import rate, regard less of fruit size. Within 3 days following pollination or auxin treatment, starch and soluble sugars increase more than can be accounted forby the decline in sucrose (12). Respiration probably increases following pollination or auxin treatment (8), leading to increased demand for assimilates.…”

Section: Discussionmentioning

confidence: 99%

Accumulation of 14C-Labelled Material from Foliar-applied 14C Sucrose by Tomato Ovaries during Fruit Set and Initial Development1

Archbold

Dennis

Flore

1982

J. Amer. Soc. Hort. Sci.

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A determinate cherry tomato (Lycopersicon esculentum Mill. cv Farthest North) was used to test whether fruit set involves mobilization of sucrose to the ovary, or whether mobilization occurs only after fruit growth commences. Following auxin treatment, average ovary fresh weight increased 0.4 mg and 3.6 mg during the first 24 and 36 hours, respectively. Radioactivity from foliar-applied 14C-sucrose was not significantly greater in auxin-treated ovaries than in water controls until 48 hours after treatment. Parallel data were obtained following pollination. Labelling with l4CO2 did not alter the response, nor did the time of labelling with 14C-sucrose. Thus, tomato fruit set per se does not appear to involve mobilization.

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Carbohydrate Metabolism in the Tomato Fruit as Affected by Pollination, Fertilization and Application of Growth Regulators

Cited by 31 publications

References 18 publications

Physicochemical Changes in Seven Tomato (Lycopersicon esculentum) Cultivars During Ripening

Physicochemical Changes in Seven Tomato (Lycopersicon esculentum) Cultivars During Ripening

Partitioning of assimilates in fruiting tomato plants

Accumulation of 14C-Labelled Material from Foliar-applied 14C Sucrose by Tomato Ovaries during Fruit Set and Initial Development1

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