`Tahiti' lime fruit set related to gibberellic acid application on out-of-season flowering and the accumulation of degree days

Spósito, Marcel Bellato; Filho, Francisco de Assis Alves Mourão

doi:10.1051/fruits:2003003

Cited by 4 publications

References 8 publications

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

et al. 2014

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Teores de carboidratos nas folhas e produção de limeiras ácida 'tahiti' aneladas e tratadas com ácido giberélico

et al. 2011

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RESUMO-O objetivo do trabalho foi avaliar o efeito do ácido giberélico (GA 3 ) e anelamento de ramos sobre os teores de carboidratos nas folhas, a produção e o peso de frutos de limeira ácida 'Tahiti'. O delineamento experimental foi em blocos casualizados, com cinco repetições, em esquema fatorial 4x3. O primeiro fator foi a aplicação de GA 3 em quatro concentrações (0; 7; 14 e 21 mg/L -1 ), e o segundo, duas épocas de anelamento, no início e um mês após o florescimento, mais a testemunha sem anelamento. Verificou-se que o GA 3 não teve efeito sobre a produção e o anelamento de ramos, independentemente da época em que foi realizado, aumentaram a produção das plantas e os teores de carboidratos nas folhas. A maior produção e relação frutos/m -3 de copa causou redução no peso médio dos frutos de limeira ácida 'Tahiti'. Termos para indexação: Lima ácida 'Tahiti', anelamento, carboidratos, fixação de frutos, ácido giberélico. FRUIT PRODUCTION AND CARBOHYDRATE CONTENTS IN THE LEAVES OF ACID LIME TREE 'TAHITI' GIRDLED AND TREATED WITH GIBBERELLIC ACIDABSTRACT -The objective of this study was to evaluate the effect of the gibberellic acid (GA 3 ) and of the girdling of branches on the carbohydrate contents in the leaves, in the production and weight of fruits of acid lime tree 'Tahiti'. The experimental design was in casualized plots, with five repetitions, and a factorial design of 4 x 3. The first factor was the application of GA 3 in four concentrations (0, 7, 14 and 21 mg/L -1 ), and the second one was the two periods of girdling: one at the beginning of flowering and the other one a month later, plus the control without girdling. It was observed that the GA 3 did not have an affect on production. The girdling of the branches, independently of the periods, increased the production of the plants and the carbohydrate contents in the leaves. The greatest production and the greatest consequent relation fruits/m -3 of crown caused a reduction in the average weight of the fruits of the acid lime tree 'Tahiti'.

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Implications of Recent Events on Portuguese Fruit Production Markets

2023

Practice, Progress, and Proficiency in Sustainability

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The fresh fruit markets have several particularities because of the perishability of these agricultural products, which brings additional pressure on the farmers, namely the smaller ones, to sell quickly after harvesting. These contexts have implications on the dynamics of the markets and in the definition of the prices. The question here is if the COVID-19 pandemic and the recent conflicts had consequences on these dynamics. The evolution of the fresh fruit producer prices in the Portuguese regions and markets was assessed. A special focus was given to the apple markets, considering their importance for the diet of the Portuguese population. For that, data from the SIMA (Sistema de Informação de Mercados Agrícolas) were considered for the weeks from 2017 to 2022. The implications from the most recent occurrences—if, in fact, had relevance—seem to have been slight.

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`Tahiti' lime fruit set related to gibberellic acid application on out-of-season flowering and the accumulation of degree days

Cited by 4 publications

References 8 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

Teores de carboidratos nas folhas e produção de limeiras ácida 'tahiti' aneladas e tratadas com ácido giberélico

Implications of Recent Events on Portuguese Fruit Production Markets

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