Physiological maturity of seeds and colorimetry of fruits of Jatropha curcas L.

MAtos, MArlene de

doi:10.1590/s0101-31222010000400018

Cited by 27 publications

(35 citation statements)

References 10 publications

(13 reference statements)

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“…Published studies with several species showed germination differences in relation to fruit maturation such as with Jatropha curcas L. (Dranski et al, 2010), Eugenia pyriformis Cambess and Eugenia involucrata DC. (Oro et al, 2012).…”

Section: Germination Testmentioning

confidence: 99%

Hovenia dulcis T. Fruit Colorimetry for Determination of Physiological Maturity of Seeds

Cruz¹,

Rocha²,

Ristau³

et al. 2017

JAS

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Hovenia dulcis is a pioneering species, fast growing and considered exotic and invasive. The species has multiplicity of uses and reproduces by seeds. In this sense, it is extremely important to know the physiological maturity of H. dulcis seeds. The objective of the research was to determine if the maturation of H. dulcis seeds is achieved concomitantly with the physiological maturation of the false fruit. Seeds were obtained from seven adult trees located in Marechal Cândido Rondon, PR. The fruits were classified in five maturation stages, determined according to color chart. In order to verify the effects of the maturation stages of the false fruit on the physiological maturity seeds biometric characteristics, moisture content, germination, vigor and seedling development were evaluated. Seeds of H. dulcis presented evolution of maturation at the same time as the false fruit. For the evaluated parameters, seeds classified as stage 1 (7.5 YR 5/8) showed the best results for seed germination and seedling development, in contrast to those classified as stage 5 (2.5 YR 3/4), which presented low germination and delay in the development of seeds and seedlings.

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Section: Germination Testmentioning

confidence: 99%

Hovenia dulcis T. Fruit Colorimetry for Determination of Physiological Maturity of Seeds

Cruz¹,

Rocha²,

Ristau³

et al. 2017

JAS

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“…A coloração dos frutos foi recomendada por Silva et al (2009) Dranski et al (2010), para sementes de pinhão-manso.…”

Section: Coloração Dos Frutos Parâmetros Avaliadosunclassified

“…Kole & Gupta (1982) e Maeda et al (1987) verificaram que o teor de óleo de sementes de girassol está fortemente relacionado com sua maturidade e que pode ser também um parâmetro importante para a escolha do momento da colheita, evitandose perdas relacionadas com o rendimento em óleo. Dranski et al (2010) observaram que frutos de pinhão-manso com epicarpo de coloração amarela com manchas marrons, apresentaram máximo acúmulo de matéria seca, teor de água inferior a 38,5% e sementes no ponto de maturidade fisiológica. No entanto, os autores não quantificaram o rendimento em óleo das sementes.…”

Section: Introductionunclassified

Acúmulo de matéria seca e óleo nas sementes de pinhão-manso e qualidade do óleo extraído

Santos

Martins²,

Aguilar³

et al. 2012

Rev. bras. eng. agríc. ambient.

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R ESU M OObjetivou-se, com o presente trabalho, avaliar o efeito do estádio de maturação dos frutos sobre o rendimento em massa de matéria seca e óleo das sementes de pinhão-manso (Jatropha curcas L.), e sobre a qualidade do óleo extraído. Frutos de pinhão-manso foram classificados em quatro diferentes estádios de maturação, de acordo com sua coloração: verde, amarela, marrom-amarela e marrom. Amostras dos frutos de cada estádio foram retiradas para a determinação do teor de água, dimensões principais, volume e contagem de sementes por fruto. As sementes foram extraídas para determinação do teor de água, dimensões principais, volume, massa seca de mil sementes, percentual em massa de óleo e percentual de ácidos graxos livres do óleo extraído. A colheita de frutos de pinhão-manso com coloração marrom-amarelo e marrom, proporcionou maior rendimento em massa seca das sementes e em conteúdo de óleo. A colheita dos frutos com coloração marrom-amarelo além de possibilitar bons rendimentos em óleo e em matéria seca, permite a obtenção de óleo com índice de acidez menor, sendo o estádio de maturação mais indicado para a realização da colheita dos frutos e sementes de pinhão-manso para fins industriais. Palavras-chave: Jatropha curcas L., época de colheita, maturidade de massaDry matter and oil accumulation in the jatropha seeds and quality of extracted oil A B ST R A C T The aim of this study was to evaluate the effect of ripening stage of the fruits on the increase in dry matter and oil content of physic nut (Jatropha curcas L.) seeds. The quality of the oil was also investigated and related to the ripening stage. The fruits were classified in four classes of colors: green, yellow, brownyellow and brown (dry fruits). Samples of fruits were collected for each ripening stage and the analysis of water content, size, volume and numbers of seeds were performed. For the seeds, water content, size, volume, mass of thousand seeds, oil content and acid value were evaluated. The harvest of brownyellow and brown fruits provided higher yields in dry matter and oil of seeds. The brown-yellow fruits presented higher oil yield and dry matter, lower acid value, so it represent the more suitable ripening stage for harvesting fruits and seeds for industrial uses.

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“…Thus, obtaining high-quality seeds has great importance, and this factor is affected by suitable harvest time, which for J. curcas is based on the outside colour of the fruits, with yellow and brownishyellow fruits being the most recommended (Dranski et al, 2010;Silva, Dias, Milagres, & Dias, 2012;Sowmya, Gowda, Balakrishna, & Rao, 2012). At these stages, the seeds are near the physiological maturity point .…”

Section: Introductionmentioning

confidence: 99%

<b>Lipid peroxidation and antioxidant enzymes of <i>Jatropha curcas</i> L. seeds stored at different maturity stages

et al. 2018

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ABSTRACT. The objective of the present work was to investigate the antioxidant enzyme activities and the occurrence of lipid peroxidation during storage of J. curcas seeds obtained from fruits at different maturity stages. Seeds extracted from fruits collected at three stages of maturity were used, i.e., yellow, brownish-yellow, and brown (dry fruits). The seeds were subsequently stored for 18 months in Kraft paper bags in a laboratory environment. Initially as well as every three months, the seeds were evaluated for germination and electrical conductivity, and the seed embryos were evaluated for lipid peroxidation; protein content; and superoxide dismutase, peroxidase, and ascorbate peroxidase enzyme activity at the same time points. In general, the seeds from the three stages of fruit maturity did not differ regarding germination throughout the entire period of storage, although a reduction in viability was observed after nine months of storage. The electrical conductivity increased during storage and was greater for the seeds obtained from brown fruits. There was a reduction in protein content and in enzyme activities in the seed embryo, except for superoxide dismutase. No relationship was observed between reduction in seed viability and lipid peroxidation. Thus, J. curcas seeds with high initial quality can be stored under environmental conditions for up to 9, 15 and 15 months for brown (dry), yellow and brownish-yellow fruits, respectively, without a significant reduction in germination but with a reduction in seed vigour.Keywords: physic nut, seed maturation and deterioration, enzyme activity, malondialdehyde content.Peroxidação de lipídios e enzimas antioxidativas em sementes de Jatropha curcas L. armazenadas em diferentes estágios de maturação RESUMO. O objetivo do presente trabalho foi avaliar a atividade de enzimas antioxidativas e a peroxidação de lipídios durante o armazenamento de sementes de J. curcas em diferentes estádios de maturação. Foram utilizadas sementes extraídas de frutos colhidos com coloração externa da casca amarela, amarela-marrom e marrom (frutos secos). As sementes foram armazenadas por 18 meses, em embalagem de papel Kraft em ambiente de laboratório. Inicialmente e a cada três meses, as sementes foram avaliadas quanto à germinação e condutividade elétrica, e os embriões das sementes foram avaliados quanto a peroxidação de lipídios, conteúdo de proteínas e atividade das enzimas superóxido dismutase, peroxidases e peroxidase do ascorbato. Em geral, as sementes dos três estádios de maturação dos frutos não diferiram quanto à germinação durante todo o período de armazenamento, embora tenha sido observada uma redução da germinação a partir de nove meses de armazenamento. Houve redução no conteúdo de proteína e na atividade das enzimas antioxidantes no embrião das sementes dos três estádios de maturação, com exceção da superóxido dismutase. Não foi observada relação entre a redução da viabilidade das sementes e a peroxidação de lipídios. Sementes de J. curcas com elevada qualidade inici...

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Physiological maturity of seeds and colorimetry of fruits of Jatropha curcas L.

Cited by 27 publications

References 10 publications

Hovenia dulcis T. Fruit Colorimetry for Determination of Physiological Maturity of Seeds

Hovenia dulcis T. Fruit Colorimetry for Determination of Physiological Maturity of Seeds

Acúmulo de matéria seca e óleo nas sementes de pinhão-manso e qualidade do óleo extraído

<b>Lipid peroxidation and antioxidant enzymes of <i>Jatropha curcas</i> L. seeds stored at different maturity stages

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