Regularidade da produção de tangerineiras ponkan submetidas ao raleio químico bianual

Moreira, Rodrigo Amato; Moreira, Richard Celso Amato; Ramos, José Darlan; Silva, Fábio Oseias dos Reis

doi:10.1590/s0100-29452011000500028

Cited by 6 publications

(9 citation statements)

References 6 publications

(3 reference statements)

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“…This behavior demonstrates that plants subjected to thinning at high concentrations may be unable to regulate yield due to the leaf abscission recorded in these plants, or stress may be caused, promoting a reduced total carbohydrate content (Figure 4). Leaf abscission was also reported in other experiments in which this concentration of Ethephon was used (MOREIRA et al, 2011a(MOREIRA et al, , 2011b …”

Section: Resultssupporting

confidence: 70%

“…A linear increase in the percentage of thinning in terms of Ethephon concentrations was seen ( Figure 5) This difference in thinning between years can be attributed to the amount of fruit produced by the plants, since the action of Ethephon on thinning intensity is proportional to the amount of fruit on the plant (MOREIRA et al, 2011a(MOREIRA et al, , 2012.…”

Section: Resultsmentioning

confidence: 91%

“…Alternate bearing, characterized by excessive fruit production interspersed with years of low or no production, is a recurring problem in the Ponkan tangerine (MAIA; SIQUEIRA; CECON, 2010;MOREIRA et al, 2011a;RUFINI;RAMOS, 2002), with depletion of the plant reserves, mainly carbohydrates which accumulate in the root system and the leaves (GOLDSCHMIDT; KOCH, 1996), occurring in the year of high production, compromising production of the next crop.…”

Section: Introductionmentioning

confidence: 99%

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Carbohydrate levels in the leaves and production consistency of the Ponkan tangerine when thinned out with Ethephon

Moreira¹,

Ramos²,

Cruz³

et al. 2013

Rev. Ciênc. Agron.

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Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Carbohydrate levels in the leaves and production consistency of the Ponkan tangerine when thinned out with Ethephon

Moreira¹,

Ramos²,

Cruz³

et al. 2013

Rev. Ciênc. Agron.

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“…A tangerineira 'Ponkan' (Citrus reticulata Blanco) está sujeita à alternância de produção, caracterizada por anos de produção excessiva de frutas intercalados com anos de baixa produção (Maia et al, 2010;Moreira et al, 2011b;Cruz & Moreira, 2012). Nos anos de alta produção, as frutas têm seu tamanho reduzido pela grande competição por fotoassimilados (Duarte et al, 2011).…”

Section: Introductionunclassified

“…Portanto, práticas de manejo que proporcionem a manutenção das reservas de carboidratos nas tangerineiras 'Ponkan' são importantes para promover floração no ano seguinte e para o desenvolvimento de frutos com qualidade adequada. Entre essas práticas, destaca-se o raleio químico Cruz et al, 2009Cruz et al, , 2010Cruz et al, , 2011Moreira, et al, 2011aMoreira, et al, , 2011b. O período de realização do raleio químico varia de acordo com as condições climáticas de cada região, que influenciam a época de floração e o desenvolvimento dos frutos.…”

Section: Introductionunclassified

Carboidratos foliares durante a floração e os estádios iniciais de crescimento de frutilhos em tangerineira 'Ponkan'

Moreira

Cruz

Fagundes

et al. 2014

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar os teores de carboidratos foliares em tangerineira 'Ponkan' (Citrus reticulata), durante o pleno florescimento e os estádios iniciais de crescimento dos frutilhos, e identificar a melhor época para realização do raleio químico. O experimento foi realizado durante dois anos de produção (2009/2010 e 2010/2011), com quatro épocas de amostragem de folhas: 0, 30, 60 e 90 dias após o pleno florescimento. Utilizou-se o delineamento de blocos ao acaso, com parcelas subdivididas no tempo, quatro repetições e quatro plantas por parcela. Para determinar a utilização dos carboidratos pelas plantas, foram avaliados os teores de açúcares solúveis, açúcares redutores e amido na matéria seca das folhas. Nas mesmas épocas de amostragem foliar, o tamanho dos frutilhos também foi determinado. Os teores foliares de carboidratos solúveis aumentam e os de amido diminuem entre 35 e 50 dias após o pleno florescimento. No final da fase de fixação dos frutilhos, a partir dos 50 dias após o pleno florescimento, os teores de açúcares solúveis nas folhas diminuem. A melhor época para a realização do raleio químico em tangerineira 'Ponkan' é logo após a fase de queda fisiológica, quando os frutilhos atingirem cerca de 18 mm de diâmetro, aos 50 dias após o pleno florescimento.Termos para indexação: Citrus reticulata, alternância de produção, pegamento de frutilhos, qualidade de frutos, raleio químico, reservas nutricionais. Leaf carbohydrates during flowering and early growth stages of fruitlets in 'Ponkan' mandarin treeAbstract -The objective of this work was to evaluate the levels of carbohydrates in the leaves of 'Ponkan' mandarin tree (Citrus reticulata), during full flowering and early growth stages of fruitlets, and to identify the best time to perform chemical thinning. The experiment was carried out for two production years (2009/2010 and 2010/2011), with four sampling times of leaves: 0, 30, 60, and 90 days after full flowering. A randomized complete block design, split-plotted in time with four replicates and four plants per plot, was used. To determine the use of carbohydrates by plants, the contents of soluble sugars, reducing sugars, and starch in the dry matter of leaves were evaluated. At the same leaf sampling times, fruitlet size was also determined. Leaf contents of soluble carbohydrates increase and the ones of starch decrease between 35 and 50 days after full flowering. At the end of the fruit setting phase, from the 50 th day after full flowering, the contents of soluble sugars in leaves reduce. The best time to perform chemical thinning in 'Ponkan' mandarin tree is soon after the physiological drop phase, when the fruitlets reach around 18 mm, at the 50 th day after full flowering.

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The use of antigibberelins with different mechanisms of action on morphogenesis and production process regulation in the plant Solanum melongena (Solanaceae)

Курьята

Rohach

et al. 2016

Biosys. divers.

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The influence of antigibberelin on the growth, development and productivity of eggplant was investigated. It was established that the use of tebuconazole and chlormequat chloride is a highly effective tool for regulation of morphogenesis and productivity of eggplant. We found that retardants slowed the growth of plants, and increased the number of leaves and leaf area and dry substance weight of the whole plant. Under the influence of Esfon ethylene producers the inhibition of the growth process was not accompanied by increase of the number, weight and area of leaves.Antigibberelin agents caused the thickening of chlorenchyma and the growth of the columnar cells and cell sizes of spongy parenchyma. Under the action of agents the thickness of the upper and lower epidermis of the leaf increased. As a result of mesostructural and morphometric changes of leaf structure under the influence of retardants the leaf index and specific leaf surface density increased.The growth inhibitory agents increased the chlorophyll content in leaves and caused the growth of chlorophyll index in crops.Retardants reduced the content of sugar and starch in leaves because of their enhanced outflow to fruits, the amount of which was predicted to be greater. Under the influence of Esfon the flow of carbohydrates to the acceptor areas was slower.The use of retardants of triazole and onium origin positively influenced the formation of productivity elements of the culture, which led to increase in the fruit yield. The use of tebuconazole was found to be the most effective.

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Regularidade da produção de tangerineiras ponkan submetidas ao raleio químico bianual

Cited by 6 publications

References 6 publications

Carbohydrate levels in the leaves and production consistency of the Ponkan tangerine when thinned out with Ethephon

Carbohydrate levels in the leaves and production consistency of the Ponkan tangerine when thinned out with Ethephon

Carboidratos foliares durante a floração e os estádios iniciais de crescimento de frutilhos em tangerineira 'Ponkan'

The use of antigibberelins with different mechanisms of action on morphogenesis and production process regulation in the plant Solanum melongena (Solanaceae)

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