TECNOLOGIA DE APLICAÇÃO DE ÁCIDO GIBERÉLICO NA MANUTENÇÃO DA COLORAÇÃO ESVERDEADA DO FRUTO LIMA ÁCIDA ‘TAHITI’ (Citrus latifolia)

Author(s):  
Gilson BARBARA ◽  
Dagmar Aparecida de Marco FERRO

A Citrus latifolia é uma planta de origem tropical e é conhecida como lima ácida. É uma fruta que depois de colhida não apresenta mudanças no sabor. Após a colheita dos frutos, a característica desejável é a casca verde, que tem grande aceitação no mercado. Os principais indicadores do ponto de colheita utilizados para a lima ácida são: coloração da casca; apresentação da superfície da casca (firmeza e sem ferimentos); tamanho da fruta e quantidade de suco. A utilização do ácido giberélico pode manter a coloração verde da casca da lima ácida, uma vez que atrasa a degradação da clorofila e o acúmulo de carotenoides, além de bloquear a perda da firmeza dos tecidos. Portanto, o objetivo desse experimento foi avaliar a utilização de doses do ácido giberélico para a manutenção da coloração do fruto lima ácida ‘Tahiti’ (Citrus latifolia). Para a metodologia, foi utilizado o produto comercial ProGibb 400 (ácido giberélico), 1,6 g de ácido em 20 litros de água, adicionados 200 ml de álcool INPM – 49 GL 54°, atingindo um pH de 5,7 e frutos de lima ácida. Os frutos foram tratados com calda de ácido giberélico, em dois experimentos: no campo e em laboratório, acondicionadas em caixas plásticas. Em ambos os experimentos, foram usadas testemunhas. Após a aplicação do ácido giberélico, as plantas observadas no experimento que receberam o tratamento não apresentaram resultados diferentes em relação às testemunhas, ou seja, mantiveram o mesmo padrão das frutas testemunhas, mesmo depois da sua maturação. A utilização do ácido giberélico mostrou melhores resultados com o fruto não climatérico no tratamento pós-colheita, que mantive melhor qualidade.   TECHNOLOGY FOR THE APPLICATION OF GIBBERELLIC ACID FOR THE GREENISH COLOR OF THE ACID LIME FRUIT “TAHITI” (CITRUS LATIFOLIA) MAINTENANCE    ABSTRACT Citrus latifolia is a plant with tropical origins known as acid lime. It’s a fruit that, after being harvested will not present any changes in its flavor. When the fruit is harvested the desirable appearance is of a green peel which has a great acceptance on the market. The main indicators of the harvesting point used for the acid lime are: color of the peel; presentation of the peel surface (firm and without injuries); size of the fruit and amount of juice. The use of gibberellic acid can maintain the greenish color of the acid lime peel, since it delays the degradation of chlorophyll and the accumulation of carotenoids, besides blocking the loss of firmness of the tissues. Therefore, the purpose of this experiment was to evaluate the use of doses of gibberellic acid in order to maintain the color of acid lime ‘Tahiti’ (Citrus latifolia) fruit. As a method, the commercial product ProGibb 400 (gibberellic acid) was used, 1,6g of acid for 20 liters of water, added to 200 ml of alcohol INPM – 49 GL 54°, reaching a pH of 5,7, and acid lime fruit samples. The fruit samples were treated with gibberellic acid syrup in both experiments: at the field and in the lab, placed in plastic boxes. In both experiments witnesses were present. After the application of gibberellic acid, the plants observed by the experiment which received the treatment did not show any results that were any different from the witnesses’, that is to say, they preserved the same standard of the witnesses’ even after their maturation. The use of gibberellic acid showed better results with the non-climacteric fruit in the post-harvesting treatment which preserved the best quality.   Keywords: Lime. Gibbereline. Coloring.

Author(s):  
Priya S. Gadge ◽  
S. N. Ingle ◽  
M. M. Raut ◽  
N. M. Konde ◽  
D. V. Mali ◽  
...  

The present investigation on “Soil characterization, leaf nutritional status and fruit quality of Acid Lime orchards in Patur block of Akola district” was undertaken during the year 2018-19. Twenty healthy lime orchards were selected on the basis of their yield performance and visual observations from five locations of Patur block viz., Wadegaon, Sasti, Patur, Mazod and Goregaon. The study was framed to evaluate the soil characteristics, leaf nutritional status and fruit quality of Acid Lime. Twenty soil samples were collected from 0-30 and 30-60 cm depth in randomly selected acid lime orchards. Similarly, the leaf and fruit samples were collected and analyzed for quality parameters. The results indicated that, the soil reaction was neutral to slightly alkaline with pH value varied from 7.35 to 8.14, EC ranges from 0.23 to 0.32 dS m-1 indicating the non-saline nature of these soils. Free calcium carbonate varied from 5.63 to 9.42%, Organic carbon showed decreasing trend with soil depth and having medium to moderately high in organic carbon. The available nitrogen was found to be low to medium, phosphorus was low, potassium was high to very high and sulphur was low to moderate. The DTPA extractable micronutrients in soil were moderately high in zinc, iron, copper and manganese. The leaf nutrient status was found to be low to optimum in total nitrogen, phosphorus and micronutrient and optimum to high in potassium. Fruits of acid lime were found to be of good quality. Since, the correlations obtained in the present studies did not show any consistent trend.


Irriga ◽  
2004 ◽  
Vol 9 (3) ◽  
pp. 270-281 ◽  
Author(s):  
José Alves Júnior ◽  
Mateus Dos Santos Lourenção ◽  
Tonny José Araújo da Silva ◽  
Cláudio Ricardo da Silva ◽  
Marcos Vinícius Folegatti

DISTRIBUIÇÃO DO SISTEMA RADICULAR DE PLANTAS JOVENS DE LIMA ÁCIDA ‘TAHITI’ SOB DIFERENTES NÍVEIS DE IRRIGAÇÃO   José Alves Júnior; Mateus dos Santos Lourenção; Tonny José Araújo da Silva; Cláudio Ricardo da Silva; Marcos Vinícius FolegattiDepartamento de Engenharia Rural, Escola Superior de Agricultura “ Luiz de Queiroz”, Universidade de São Paulo, Piracicaba-SP, [email protected]   1 RESUMO  O objetivo deste estudo foi avaliar a distribuição do sistema radicular de lima ácida ‘Tahiti’ (Citrus latifolia Tan), irrigada por gotejamento, sob o efeito de diferentes lâminas de irrigação em condições de campo. O delineamento experimental foi inteiramente casualizado em duas repetições com arranjo fatorial de cinco lâminas de irrigação (0%; 25%; 50%; 75% e 100% da evapotranspiração da cultura medida em um lisímetro de pesagem), duas profundidades (0,0-0,3 e 0,3-0,6 m) e quatro pontos de amostragem (0,3; 0,6; 0,9 e 1,2 m de distância do tronco). A análise foi realizada em um pomar com 30 meses de idade e 17 meses de fornecimento das diferentes lâminas de irrigação. Os resultados mostraram que não houve diferenças entre as lâminas quanto à distribuição das raízes em profundidade, concentrando-se na camada de 0,0-0,3m. Entretanto, a distribuição horizontal foi maior nos níveis baixos (0%; 25% e 50%) do que nos maiores níveis (75% e 100%). Nas plantas irrigadas com 75% e 100% houve concentração das raízes até 0,6 m, indicando que o déficit hídrico induziu o crescimento horizontal das raízes.  UNITERMOS: citros; raiz; manejo da irrigação; Citrus latifolia Tan   ALVES JUNIOR, J.; LOURENÇÃO, M.S.; SILVA, T.J.A.; SILVA, C.R.; FOLEGATTI, M.V. ROOT SYSTEM DISTRIBUTION OF YOUNG ‘TAHITI’ ACID LIME TREES UNDER DIFFERENT LEVELS OF IRRIGATION   2 ABSTRACT  The aim of this study was to evaluate the root system distribution of young ‘Tahiti’ (Citrus latifolia Tan) acid lime irrigated by drip system under field conditions. The experiment was carried out in a factorial design with two replications that consisted of five levels of irrigation (0%, 25%, 50%, 75% and 100% of crop evapotranspiration measured by a weighing lysimeter) and two depths (0.,0-0.3 and 0.3-0.6 m) as well as four horizontal sample points (0.3; 0.6; 0.9 and 1.2 m of distance from trunk). The analysis was carried out in a 30-month-old orchard and  17 months after the beginning of irrigation levels. The results showed that there were no differences in root distribution as to depths, most of them at 0.0-0.3m. However, the horizontal distribution was bigger at lower levels (0, 25 and 50%) than in the highest levels (75 and 100%). In the latter, root concentration reached up to 0.6m, indicating that water stress induced the root growth horizontally  KEYWORDS: citrus; root; irrigation management; Citrus latifolia Tan


Author(s):  
Daniela Soares ◽  
Lucia Maria Jaeger de Carvalho ◽  
Ediane Maria Gomes Ribeiro ◽  
Gisela Maria Dellamora Ortiz

2011 ◽  
Vol 31 (4) ◽  
pp. 918-922 ◽  
Author(s):  
Carolina Netto Rangel ◽  
Lucia Maria Jaeger de Carvalho ◽  
Renata Borchetta Fernandes Fonseca ◽  
Antonio Gomes Soares ◽  
Edgar Oliveira de Jesus

Author(s):  
Alex Guimarães Sanches ◽  
Maryelle Barros da Silva, Elaine Gleice Silva Moreira ◽  
Carlos Alberto Martins Cordeiro

The sunflower (Helianthus annuus L.) is an ornamental plant of great acceptance in the market, however, as cut flower has its limited useful life, about 3 to 5 days at room temperature. In order to prolong shelf life and preserve post-harvest quality was evaluated the effect of maintenance solutions on sunflower cv.  Oasis for 10 days storage at 25 °C. O experimento foi conduzido em delineamento inteiramente casualizado em arranjo fatorial 5x6, correspondendo a cinco tratamentos/soluções de manutenção (distilled water (control), sucrose, citric acid, gibberellic acid and  benzylaminopurine to 5%) and six evaluation times (0, 2, 4, 6, 8 and 10 days). The effect of treatments on fresh mass, inflorescence turgescence, stem curvature, relative petal water content, respiratory rate and carbohydrate content was investigated. The results showed that the solutions with sucrose and gibberellic acid significantly (p<0.05) preserved the quality of the inflorescences as a function of the control of respiratory activity and water absorption, thereby reducing the physiological processes related to senescence. It is recommended to use sucrose 5% as a maintenance solution due to the low cost to producers and consumers.


2019 ◽  
Vol 2 (1) ◽  
pp. 261-273
Author(s):  
Lina Asri Wulandari ◽  
Tri Agus Siswoyo ◽  
Kacung Hariyono

Tomato was classified as a climacteric fruit with a fast ripening period andthen followed by the increase of fruit softening. The inhibition of fruit softening was needed to maintain the quality and shelf life of the fruit. One of the way to inhibit the tomatoes softening was calcium application. However, the best concentration and timing of calcium application for tomato was still limited. The aimed of research was to determine the best combination of concentration and time of application of calcium chloride (CaCl2) to the physicochemical of tomato. Experiment was arranged in factorial completely randomized design (CRD) with two factors and three replications. First factor was concentration of CaCl2 which consisted of 5 levels (0 M; 0.3 M; 0.6 M; 0.9 M; 1.2 M), while the second factor was application time of CaCl2 (pre- and post-harvesting). The results showed that there was no interaction between concentration and application time of CaCl2 to the physicochemical of tomatoes. Treatment of CaCl2 1.2 M could increased fruit calcium content, inhibited weight loss and fruit softness, increased total titrated acid content, and inhibited the degradation of vitamin C. The application time of CaCl2 in pre- and post-harvest was not significantly different in term of physicochemical properties. Keywords: fruit softness, quality, weight loss, shelf life, vitamin C


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