Produção, florescimento e frutificação de tangerineira 'Poncã' submetida à aplicação de ácido giberélico

Souza, Emanuel Fernando Maia de; Siqueira, Dalmo Lopes de; Cecon, Paulo Roberto

doi:10.1590/s0103-84782010005000025

Cited by 8 publications

(9 citation statements)

References 10 publications

(19 reference statements)

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“…At every 1 mg.L -1 of bioregulator added to the spray volume, there was a reduction of 1.64 fruits per planta -1 in abscission. This phenomenon occurred due to the effect that the GA 3 has on the flowering, which is in agreement with the results of Maia et al (2010) in a study conducted with Ponkã tangerine trees (Citrus reticulata Blanco). The authors stated that the regulator reduces excessive flowering and may reduce the effect of production alternance, generating higher productivity, over the years of the tangerine trees.…”

Section: Resultssupporting

confidence: 91%

“…The Thus, this result is corroborating with earlier studies that indicated that the inhibitory effect of GA 3 on the flower differentiation, preventing, or decreasing the production of flowers (Maia et al, 2010). With the application of GA 3 , the plant decreased the intake of assimilates involved in flowering (Serciloto et al, 2003), increasing the supply of carbohydrates to the fruits (Pereira et al, 2011).…”

Section: Resultssupporting

confidence: 90%

“…Exogenous application of GA 3 can reduce the excess of flower formation, generating better balance between the number of flowers and the carbohydrates in the plant, increasing the percentage of fruit set per plant, therefore the production of citrus in various flowerings (Maia et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Application of GA3 and girdling of branches on the production of extemporaneous fruits of 'Tahiti' acid lime

et al. 2014

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Aplicação de GA 3 e anelamento de ramos na produção de frutos extemporâneos de limeiras ácidas 'Tahiti'Objetivou-se, neste trabalho, avaliar os efeitos do anelamento de ramos e da aplicação de GA 3 , ainda na florada da safra principal, sobre a formação de estruturas reprodutivas, o pegamento e a produção de frutos da florada subsequente, extemporânea, de limeira ácida 'Tahiti'. Utilizou-se o delineamento experimental em blocos casualizados, com cinco repetições, em esquema fatorial 4 x 3. O primeiro fator foi a aplicação foliar de GA 3 , 88 dias antes da florada extemporânea, nas concentrações (0, 7, 14 e 21 mg.L -1 ). O segundo fator foram as épocas de anelamento, 108 dias antes do início do florescimento (A108AF), 78 dias antes do florescimento (A78AF), mais a testemunha, sem anelamento (SA). Na florada extemporânea, as proporções de botões florais, flores e frutos que sofreram abscisão foram de 38,75; 31,25 e 18,64%, respectivamente, e foram colhidas 11,34% de todas as estruturas reprodutivas formadas. O GA 3 não alterou o pegamento. O anelamento aumentou o pegamento dos frutos em 229 e 256%, aos A108DAF e A78DAF, respectivamente, em relação às plantas SA. O GA 3 reduziu a formação de estruturas florais, fato que propiciou aumento, de forma quadrática, da produção, por reduzir a concorrência por fotoassimilados entre os frutos, sendo a concentração de 21 mg.L -1 a mais produtiva, com 15,97 frutos.planta -1 .Palavras-chave: giberelina, floração, estruturas reprodutivas, floema. Application of GA 3 and girdling of branches on the production of extemporaneous fruits of 'Tahiti' acid limeThe objective of this study was to evaluate the effect of girdling of branches and the application of GA 3 , still in the main crop flowering on the formation of reproductive structures, the fruit set of the following extemporaneous flowering of 'Tahiti' acid lime. This work used a randomized block design with five replications in a 4x3 factorial design. The first factor was the foliar application of GA 3 , 88 days before extemporaneous flowering at five concentrations (0, 7, 14 and 21 mg.L -1 ). The second factor was the girdling times, 108 days before flowering onset (A108AF), 78 days before flowering (A78AF) plus no-girdling control (NG). In extemporaneous flowering, the proportion of buds, flowers and fruits that abscised was 38.75, 31.25 and 18.64% respectively and 11.34% of all reproductive structures formed were collected. GA 3 did not affect fruit set. Girdling increased fruit set by 229 and 256% at A108DAF and A78DAF respectively, in relation to NG plants. The GA 3 reduced the formation of floral structures, which resulted in a quadratic increase in field production by reducing the competition for photoassimilates among fruits. The concentration of 21 mg.L -1 was the most productive, with 15.97 fruit.plant -1 .

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 90%

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Application of GA3 and girdling of branches on the production of extemporaneous fruits of 'Tahiti' acid lime

et al. 2014

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“…Esses resultados são similares aos observados em outras pesquisas com citros, as quais não verificaram alteração nas características vegetativas das plantas em concentrações que variaram de 20 a 75mg L -1 (LEONEL & RODRIGUES, 1996;SANCHES et al, 2001;SERCILOTO et al, 2003;MAIA, et al, 2010), demonstrando que a ausência de resposta possivelmente não seja devido a doses usadas. Segundo POWELL (1987), para obtenção de aumento no tamanho das plantas, há necessidade de aplicações constantes de AG 3 para a maioria das espécies, já que uma única aplicação nem sempre é suficiente para obtenção de bons resultados.…”

Section: Resultsunclassified

“…O tipo e a intensidade dessas respostas são dependentes da concentração aplicada, do estádio fenológico em que a planta se encontra no momento da aplicação e da variedade (KOSHITA et al, 1999;GRAVINA, 2007 ). Aplicações no período de indução floral geralmente reduzem o florescimento (KOSHITA et al, 1999;MAIA et al, 2010) e, durante a floração e queda das pétalas, promovem ou não a fixação de frutos. Se promoverem, há forte tendência em redução do tamanho final do fruto devido à concorrência por carboidratos (GRAVINA, 2007).…”

Section: Introductionunclassified

Crescimento vegetativo e intensidade de cor verde das folhas de limeira ácida 'Tahiti' anelada e tratada com ácido giberélico

et al. 2010

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Boron foliar application, branch girdling and plant growth regulators on yield and fruit quality of ‘Garber’ pear trees

Giacobbo

Picolotto

Pasa

et al. 2018

An. Acad. Bras. Ciênc.

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The aim of this study was to evaluate the influence of boron foliar application, branch girdling and plant growth regulators on the performance of pear trees cv. Garber. The experiment was arranged in a randomized block design with three replications. Treatments consisted of different boron rates (220, 440, 660 and 880 mL 100 L-1), branch girdling, and the plant growth regulators Promalin® (benzyladenine + gibberellins AG4+7) (560 mL 100 L-1) and Biozyme * TF (200 mL 100 L-1). The percentage of fruit set, stem length, fruit length, fruit diameter, flesh firmness, soluble solids and yield were assessed. The greatest fruit set was observed with Promalin® in both years and also boron and Biozyme * TF in the second year. The use of Promalin® increased peduncle length, fruit height but negatively affected soluble solids. Yield was also increased by this plant growth regulator and boron. Concluding, Promalin® improves fruit set, yield, and fruit quality and boron positively influence yield.

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Produção, florescimento e frutificação de tangerineira 'Poncã' submetida à aplicação de ácido giberélico

Abstract: Produção, florescimento e frutificação de tangerineira 'Poncã' submetida à aplicação de ácido giberélico.Ciência Rural, v.40, n.3, mar, 2010. Ciência Rural, Santa Maria, v.40, n.3, p.507-512, mar, 2010 ISSN 0103-8478 Emanuel

Cited by 8 publications

References 10 publications

Application of GA3 and girdling of branches on the production of extemporaneous fruits of 'Tahiti' acid lime

Application of GA3 and girdling of branches on the production of extemporaneous fruits of 'Tahiti' acid lime

Crescimento vegetativo e intensidade de cor verde das folhas de limeira ácida 'Tahiti' anelada e tratada com ácido giberélico

Boron foliar application, branch girdling and plant growth regulators on yield and fruit quality of ‘Garber’ pear trees

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