Patterns of Assimilate Production and Translocation in Muskmelon (<i>Cucumis melo</i> L.)

Mitchell, Donald E.; Madore, Monica A.

doi:10.1104/pp.99.3.966

Cited by 71 publications

(32 citation statements)

References 19 publications

(33 reference statements)

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“…Este tipo de comportamento é reforçado pela maior liberação de CO 2 pelos frutos sob condições de pleno sol, apesar de não ter diferido estatisticamente dos ambientes Cromatinet ® e Sombrite ® (Tabela 4). Mitchell & Madore (1992) verificaram que a exposição de plantas de melão a temperatura de 10°C durante 72 h promoveu o acúmulo de amido, sacarose, glicose, frutose e aminoácidos nos tecidos de folhas-fonte. Esses autores concluíram que efeitos indesejáveis, como redução na qualidade dos frutos durante o amadurecimento sob condições de baixas temperaturas, podem ser atribuídos a alterações no suprimento de fotoassimilados pelas folhas-fonte, aos frutos.…”

Section: Resultsunclassified

Produção e qualidade de frutos de melões amarelo e charentais cultivados em ambientes sombreados

Pereira¹,

Puiatti²,

Finger³

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMOObjetivou-se, neste estudo, avaliar a produção e a qualidade de frutos de melões, tipos Amarelo ('Gold Mine') e Charentais ('Fleuron'), em experimento conduzido na Universidade Federal de Viçosa, no período de 24/11/2003 a 11/03/ 2004. Os tratamentos foram constituídos de quatro ambientes de cultivo: Controle (pleno sol) e sob sombreamento com malhas Aluminet ® 30%-O, Cromatinet ® 30%-O e Sombrite ® 30%. O delineamento experimental foi o inteiramente casualizado, com quatro repetições. Dentre os tratamentos com sombreamento a malha Aluminet ® 30%-O foi o que mais se destacou não diferindo em produção nem em qualidade, de frutos do tratamento sob condições de pleno sol. Fatores climáticos registrados em cada ambiente de cultivo e genéticos inerentes aos híbridos 'Gold Mine' (Grupo Inodorus) e 'Fleuron' (Grupo Cantaloupensis) interferiram na produção e na qualidade dos frutos de melão. A baixa insolação média diária, a radiação fotossinteticamente ativa moderada e a elevada precipitação pluviométrica registrada ao longo do experimento contribuíram para a redução na qualidade dos frutos. O desempenho satisfatório das plantas sob a malha Aluminet ® 30%-O possibilita o cultivo do meloeiro em sistemas agroflorestais ou cultivos associados. Palavras-chave:Cucumis melo, sombreamento, produtividade, sólidos solúveis totais, etileno Yield and quality of yellow and "charentais" melon fruits cultivated in shaded environments ABSTRACTThis work aimed to evaluate the yield and quality of melon fruits, types Yellow (Gold Mine) and "Charentais" (Fleuron), in an experiment carried out at the Universidade Federal de Viçosa, from 11/24/2003 to 03/11/2004. The treatments were constituted of four cultivation environments: control (full sun) and shaded with screens Aluminet ® 30%-O, Cromatinet ® 30%-O and Sombrite ® 30%. The experiment was disposed in a completely randomized design, with four replicatios. Among the treatments with shading the screen Aluminet ® 30%. O was the one that most stood out, not having differences in yield and quality of fruits from those obtained under conditions of full sun. The climatic factors registered in each cultivation environment and the inherent genetic factors to the hybrid Gold Mine (Inodorus group) and Fleuron (Cantaloupensis group) also interfered in the yield and quality of the melon fruits. The low daily medium sunshine, the moderate photosynthetic active radiation and the high precipitation registered along the experiment contributed to the reduction in the quality of the fruits. The good performance of the melon plant, when cultivated under Aluminet ® 30%-O screen, opens perspectives for agroforest systems or associated cultivations.

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Section: Resultsunclassified

Produção e qualidade de frutos de melões amarelo e charentais cultivados em ambientes sombreados

Pereira¹,

Puiatti²,

Finger³

et al. 2010

Rev. bras. eng. agríc. ambient.

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“…Labeled Gly and Ser were exported at a11 leaf temperatures under the photorespiratory conditions (data not shown). As noted in Cucumis melo (Mitchell and Madore, 1992), the amino acid fraction contained a slightly higher percent of the label at 15°C; however, the total amount of label in the amino acid pool was less than 8% of the total in the petiole (Fig. 6, C and D).…”

mentioning

confidence: 97%

“…Inhibition of C export at low leaf temperature (O-5.C) may be related to changes in C partitioning and Pi exchange between the chloroplast and the cytosol in the mesophyll cells of the source leaf (Leegood and Furbank, 1986;Holaday et al, 1992;Mitchell and Madore, 1992). However, an increase in viscosity of the transport stream, phloem blockage, reduced phloem load-Plant Physiol.…”

mentioning

confidence: 99%

The Effect of Leaf Temperature and Photorespiratory Conditions on Export of Sugars during Steady-State Photosynthesis in Salvia splendens

Jiao

Grodzinski

1996

Plant Physiology

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Export and photosynthesis i n leaves of Salvia splendens were measured concurrently during steady-state 14C0, labeling conditions. Under ambient CO, and O, conditions, photosynthesis and export rates were similar at 15 and 25"C, but both declined as leaf temperature was raised from 25 to 40°C. Suppressing photorespiration between 15 and 40°C by manipulating CO, and O, levels resulted in higher rates of leaf photosynthesis, total sugar synthesis, and export. There was a linear relationship between the rate of photosynthesis and the rate of export between 15 and 35°C. At these temperatures, 60 to 80% of the carbon fixed was readily exported with sucrose, raffinose, and stachyose, which together constituted over 90% of phloem mobile assimilates. Above 35"C, however, export during photosynthesis was inhibited both in photorespiratory conditions, which inhibited photosynthesis, and in nonphotorespiratory conditions, which did not inhibit photosynthesis. Sucrose and raffinose but not stachyose accumulated i n the leaf at 40°C. When leaves were preincubated at 40°C and then cooled to 3 5 T , export recovered more slowly than photosynthesis. These data are consistent with the view that impairment of export processes, rather than photosynthetic processes associated with light trapping, carbon reduction, and sucrose synthesis, accounted for the marked reduction i n export between 35 and 40°C. Taken together, the data indicated that temperature changes between 15 and 40°C had two effects on photosynthesis and concurrent export. At all temperatures, suppressing photorespiration increased both photosynthesis and export, but above 35"C, export processes were more directly inhibited independent of changes i n photorespiration and photosynthesis.

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“…Alternatively, the bipolar pattern of citrulline accumulation may reflect the large pool size of organic nitrogen resources in the OP and FC in mature watermelon fruits. In Cucurbitaceous species, citrulline functions as a major carrier for organic nitrogen . In watermelon, citrulline is most likely synthesised in vegetative tissues such as leaves, and then transported to fruit tissues to provide organic nitrogen moieties not only for the development of fruit tissue itself but also for the biosynthesis of a set of seed storage proteins, an important resource for germination and propagation of the progeny.…”

Section: Resultsmentioning

confidence: 99%

Spatial accumulation pattern of citrulline and other nutrients in immature and mature watermelon fruits

Akashi

Mifune

Morita

et al. 2016

J. Sci. Food Agric.

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Patterns of Assimilate Production and Translocation in Muskmelon (Cucumis melo L.)

Cited by 71 publications

References 19 publications

Produção e qualidade de frutos de melões amarelo e charentais cultivados em ambientes sombreados

Produção e qualidade de frutos de melões amarelo e charentais cultivados em ambientes sombreados

The Effect of Leaf Temperature and Photorespiratory Conditions on Export of Sugars during Steady-State Photosynthesis in Salvia splendens

Spatial accumulation pattern of citrulline and other nutrients in immature and mature watermelon fruits

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