Carbohydrate accumulation and color development in watermelon, Citrullus lanatus (Thunberg) Matsumura and Nakai

Brown, A. C.

doi:10.31274/rtd-180813-8228

Cited by 11 publications

(16 citation statements)

References 11 publications

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“…Sucrose accumulation in fruit started from 3 weeks after pollination, while the accumulation of glucose and fructose was evident from 2 weeks after pollination. These results are the same as previously reported by others (Brown and Summers, 1985;Elmstrom and Davis, 1981). While sucrose accumulation in fruit grown under the 2C-1 treatment started to increase steeply from 3 to 4 weeks after pollination, levels of glucose and fructose remained steady.…”

Section: Discussionsupporting

confidence: 94%

Impact of secondary-lateral branch removal during watermelon production

Choi

Cho²,

Moon³

et al. 2012

Hortic. Environ. Biotechnol.

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The cultural practice of removal of the secondary-lateral branch of watermelon during the production in greenhouse requires intensive input of human labor. Secondary-lateral branch removal practices were examined in horizontally trained two watermelon cultivars (Citrullus lanatus), 'Sambock-gul' and 'Speed-honey' to determine the comparative differences in labor input as well as to understand their impact on plant and fruit growth and fruit sugar accumulation. Two experiments were conducted. Experiment 1 consisted of two treatments for plants trained with one main stem and two lateral branches: removal of the entire secondary-lateral branch or removal of the secondary-lateral branch below the fruit set node (partial removal). Experiment 2 consisted of three treatments for plants trained with either two or three lateral branches after topping the main stem: removal of the entire secondary-lateral branch, removal of the secondary-lateral branch below fruit set node, or removal of the secondary-lateral branch below the 5th node above fruit set node. Results showed that removal of the secondary-lateral branch below the fruit set node lowered human labor input by 50% compared with removal of the entire secondary-lateral branch. Additionally, some physiological benefits were also found for the plant treated by partial removal of the secondary-lateral branch. While fruit growth rate and fruit sucrose accumulation were much slower than those under other treatments until 3 weeks after pollination, 4 weeks after pollination sucrose accumulation started to increase steeply, and reached the highest concentration observed, 18.2 mg mL -1 . A greater increase in the length of fine roots, 0.2 mm in diameter, was observed under the partial removal treatment than for the entire removal treatment. During the fruit ripening period, the younger and developing leaves on secondary-lateral branches had a higher growth rate and higher photosynthetic activity than those of leaves on lateral branches. The integrated data indicate that active leaves on the secondary-lateral branch are likely to compete with the fruit as a sink during the fruit growing period, leading to slow fruit growth. However, during fruit ripening, the leaves on the secondary-lateral branch are likely to become a supportive source of carbon, leading to enhancement of sucrose accumulation in fruit.

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Section: Discussionsupporting

confidence: 94%

Impact of secondary-lateral branch removal during watermelon production

Choi

Cho²,

Moon³

et al. 2012

Hortic. Environ. Biotechnol.

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“…). However, lycopene‐related transition in hue angle ( h °) and in intensity of red colour ( C * and a *) might derive from both harvest maturity and postharvest storage . The current study indicates that chroma could be heightened by postharvest storage at 25 °C depending on fruit maturity at harvest.…”

Section: Resultsmentioning

confidence: 68%

“…However, lycopene-related transition in hue angle (h ∘ ) and in intensity of red colour (C* and a*) might derive from both harvest maturity and postharvest storage. 8,23,24 The current study indicates that chroma could be heightened by postharvest storage at 25 ∘ C depending on fruit maturity at harvest. Significant postharvest increase in chroma was observed at 30 DPA, at the onset of maturation, which indicates active postharvest colour development in commercially immature fruit.…”

Section: Pulp Colorimetrymentioning

confidence: 66%

Configuration of watermelon fruit quality in response to rootstock‐mediated harvest maturity and postharvest storage

et al. 2015

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Grafting enhances pulp texture and bioactive composition. Potential suppression of sugar content as a result of grafting is minimized at full commercial maturity. Brief postharvest ambient storage enhances pulp lycopene and chroma, especially in early-picked fruit, notwithstanding the depletion of monosaccharides and citrulline and a limited deterioration of texture. © 2015 Society of Chemical Industry.

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“…Sugar content is a key factor in determining watermelon fruit quality. The sweetness of a watermelon is determined by both the total sugar content and the ratios among the major accumulated sugars: glucose, fructose and sucrose 45 . In young 97103 fruit flesh, fructose and glucose are the predominant sugars, whereas in mature 97103 fruit flesh, both sucrose and total sugar content are substantially increased, with sucrose then becoming the dominant sugar; in the rind, the sugar content remains relatively lows (Supplementary Table 38).…”

Section: Npgmentioning

confidence: 99%

The draft genome of watermelon (Citrullus lanatus) and resequencing of 20 diverse accessions

et al. 2012

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Watermelon, Citrullus lanatus, is an important cucurbit crop grown throughout the world. Here we report a high-quality draft genome sequence of the east Asia watermelon cultivar 97103 (2n = 2x = 22) containing 23,440 predicted protein-coding genes. Comparative genomics analysis provided an evolutionary scenario for the origin of the 11 watermelon chromosomes derived from a 7-chromosome paleohexaploid eudicot ancestor. Resequencing of 20 watermelon accessions representing three different C. lanatus subspecies produced numerous haplotypes and identified the extent of genetic diversity and population structure of watermelon germplasm. Genomic regions that were preferentially selected during domestication were identified. Many disease-resistance genes were also found to be lost during domestication. In addition, integrative genomic and transcriptomic analyses yielded important insights into aspects of phloem-based vascular signaling in common between watermelon and cucumber and identified genes crucial to valuable fruit-quality traits, including sugar accumulation and citrulline metabolism

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Carbohydrate accumulation and color development in watermelon, Citrullus lanatus (Thunberg) Matsumura and Nakai

Cited by 11 publications

References 11 publications

Impact of secondary-lateral branch removal during watermelon production

Impact of secondary-lateral branch removal during watermelon production

Configuration of watermelon fruit quality in response to rootstock‐mediated harvest maturity and postharvest storage

The draft genome of watermelon (Citrullus lanatus) and resequencing of 20 diverse accessions

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