Compostos fenólicos inibidores da germinação em sementes de mamão (Carica papaya)

Tokuhisa, Dai; Dias, Denise Cunha Fernandes dos Santos; Alvarenga, Eveline Mantovani; Hilst, Paulo César; Demuner, Antônio J.

doi:10.1590/s0101-31222007000300022

Cited by 22 publications

(11 citation statements)

References 17 publications

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“…KNO 3 is an important inducer of germination in papaya seeds (TOKUHISA et al, 2007a). KNO 3 at concentrations equal to or higher than 0.1 mol dm -3 , supplied for 60 min., overcame seed dormancy, more than doubling germination percentage 30 days after sowing (27% in controls and 61% for seeds treated with 0.1 mol dm -3 KNO 3 ) at both maturity stages (Figure 2).…”

Section: Methodsmentioning

confidence: 99%

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<b>Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones

Zanotti¹,

Dias²,

Barros

et al. 2014

Acta Sci. Agron.

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ABSTRACT. This study aimed to investigate the effects of growth regulators on germination rates and biochemical compound concentrations in Carica papaya L. seeds ('Formosa' group). The seeds were harvested from fruits at maturation stages 3 and 5 (50 and 75% yellow fruit skin, respectively). The effects of 2-chloroethylphosphonic acid (CEPA), KNO 3 and gibberellic acid (GA 3 ) on seed germination, germination index speed, soluble sugars, starch, lipids, soluble proteins and total proteins of the papaya seeds were evaluated. The seeds from stage 5 showed a higher rate of germination 30 days after sowing than did the seeds from stage 3. Treatment with CEPA decreased seed germination, apparently due to decreased starch mobilization; the opposite response was observed following KNO 3 treatment. GA 3, alone or in combination with KNO 3, stimulated an increase in lipid mobilization. In general, with the exception of CEPA, all growth regulators tested were effective in overcoming seed dormancy, and KNO 3 was the most effective. The seeds from stage 3 fruits treated with KNO 3 or KNO 3 + GA 3 had higher rates of germination at 14 days.Keywords: Carica papaya L, CEPA, ethylene, gibberellins, KNO 3 , reserve compounds.Germinação e alterações bioquímicas em sementes de mamão do grupo 'Formosa' tratadas com fitohormônios RESUMO. O objetivo deste trabalho foi investigar o efeito de reguladores de crescimento na germinação e na variação de alguns compostos em sementes de Carica papaya L. grupo "Formosa", extraídas de frutos nos estádios de maturação 3 e 5, correspondendo a 50 e 75% da casca com cor amarela, respectivamente. Avaliaram-se os efeitos do ácido 2-cloroetilfosfônico (CEPA), KNO 3 e GA 3 na germinação, índice de velocidade de germinação, no conteúdo de açúcares solúveis, amido, lipídios, proteínas solúveis e totais das sementes. As sementes-controle obtidas de frutos no estádio 5 apresentaram maior germinação aos 30 dias após a semeadura em relação às do estádio 3. O CEPA promoveu diminuição na germinação das sementes, aparentemente, associado com a redução da mobilização de amido, sendo revertida com KNO 3 . O GA 3 , isoladamente e em associação com o KNO 3 , promoveu maior mobilização de lipídios. Em geral, com exceção do CEPA isoladamente, todos os reguladores de crescimento testados foram eficientes na superação da dormência. O KNO 3 mostrou-se o composto mais eficiente em aumentar a germinação. Sementes do estádio 3 tratadas com KNO 3 ou KNO 3 +GA 3 apresentaram maior germinação aos 14 dias.

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Section: Methodsmentioning

confidence: 99%

“…Papaya seeds have physiological dormancy, and their germination process is slow and non-uniform (LOPES; SOUZA, 2008). Such dormancy is believed to be associated with inhibiting compounds (TOKUHISA et al, 2007a) that are believed to act mainly in the sarcotesta (TOKUHISA et al, 2007b).…”

Section: Introductionmentioning

confidence: 99%

<b>Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones

Zanotti¹,

Dias²,

Barros

et al. 2014

Acta Sci. Agron.

Self Cite

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“…Tokuhisa et al (2007b) found that dormant papaya seeds contain phenolic compounds, with a greater concentration in the sclerotesta, followed by the sarcotesta, though practically absent from the embryo and endosperm.…”

Section: Introductionmentioning

confidence: 98%

Sodium hypochlorite for removal of the sarcotesta from newly extracted and stored papaya seeds

et al. 2016

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-The objective of this study was to evaluate the effect of sodium hypochlorite on removal of the sarcotesta and the germination process of newly harvested papaya seeds before and after storage for 44 days. Nine treatments were evaluated using a completely randomized design with six treatments in a split plot arrangement and three additional treatments (control), each treatment with eight replications. The plots consisted of methods for breaking dormancy: M1 -sieve method + drying to 7%, M2 -sieve method + drying to 7% + NaOCl, and M3 -NaOCl + drying to 7%. The split plots consisted of different storage periods (0 and 44 days). The three additional treatments consisted of A -NaOCl at 6% for 12 hours, B -sieve method, and C -intact seeds in running water for 24 hours. Germination and the first count of germination were evaluated. Results showed that sodium hypochlorite is effective in removal of the sarcotesta, but there is a negative effect on germination. Storage for 44 days also had a negative effect on germination. Removal of the sarcotesta by the sieve method followed by drying to 7% moisture content was effective in promoting germination of papaya seeds.Index terms: Carica papaya L., active chlorine, germination.Hipoclorito de sódio na remoção da sarcotesta de sementes de mamão recém-extraídas e armazenadas RESUMO -Objetivou-se avaliar o efeito do hipoclorito de sódio na retirada da sarcotesta e no processo germinativo de sementes de mamão recém-extraídas, previamente armazenadas, antes e após armazenamento por 44 dias. Foram avaliados nove tratamentos segundo delineamento inteiramente casualizado, sendo seis tratamentos no esquema de parcelas subdivididas e três tratamentos adicionais (controles). As parcelas foram constituídas pelos métodos para quebra de dormência: M1 -Método da Peneira + Secagem a 7%; M2 -Método da Peneira + Secagem a 7% + NaOCl; e M3 -NaOCl + Secagem a 7%. As subparcelas pelo tempo de armazenamento (zero e 44 dias). Os três tratamentos adicionais consistiram em: A -NaOCl a 6% por 12 horas; B -Método da Peneira e C -Sementes intactas em 24 horas em água corrente. Avaliou-se o teste de germinação e a primeira contagem do teste de germinação. O uso do hipoclorito de sódio é eficiente para retirar a sarcotesta, porém afeta negativamente a germinação. O armazenamento por 44 dias é prejudicial à germinação. A remoção da sarcotesta pelo método da peneira, seguida da secagem até 7% de teor de água foi eficiente para propiciar a germinação das sementes de mamão.Termos para indexação: Carica papaya L., cloro ativo, germinação.

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“…The causes of this problem are not yet fully understood and are attributed to post harvest dormancy or to difficulties in their preservation during storage. Among the problem mentioned are many factors such as: influence of the harvest season on seeds quality (Tokuhisa et al, 2007a); the post-harvest storage of fruits (Martin et al 2006); the presence of sarcotesta (Tokuhisa et al, 2007a); the presence of inhibitory compounds on the seed structures (Tokuhisa et al 2007b). Nagao and Furutani (1986), assessing the relative weight and the germination of papaya seeds, belonging the group 'Solo', reported that the lower density seeds (although not showing external differences in relation to the seeds with higher density) did not have a normal embryo, which was verified by incising the seeds.…”

Section: Introductionmentioning

confidence: 99%

Morphological changes and quality of papaya seeds as correlated to their location within the fruit and ripening stages

Dias

Gomes

et al. 2014

Idesia

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Papaya seeds presents irregular and slow germination. In this sense, the evaluation of the internal morphology of the seeds may be viable and complementary in evaluating the physiological quality of seed. The objective of this study was to evaluate the morphological and physiological quality of papaya seeds extracted at different ripeness stages of the fruit and the position inside of the fruit. Papaya fruits were harvested at maturity stage 1 and the seeds extracted in stages 1, 3, 5 and full maturation. The fruits were cut into three portions of equal size. Seeds of the central portion and extremities were extracted separately. Were determined: seed germination (%), dormant seeds (%), accelerated aging, X-ray test and seedling length. A randomized design factorial was used with four replications. Data were subjected to analysis of variance and treatment means were compared by Tukey test at 5% probability. The results demonstrated that the post-harvest maturity of fruits improves the physiological quality of papaya seeds, promoting a reduction in the number of dormant and non-viable seeds. High physiological quality seeds is obtained from the central portion of fruits at fifth and final maturation stages, corresponding from 75% to 100% of maturation, respectively. The X-ray test proved to be adequate to evaluate the morphological quality of papaya seed, allowing distinguish between empty seeds and seed with normal embryo within a sample.Key words: Carica papaya L., germination, maturation, X-ray. RESUMEN

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Compostos fenólicos inibidores da germinação em sementes de mamão (Carica papaya)

Cited by 22 publications

References 17 publications

<b>Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones

<b>Germination and biochemical changes in ‘Formosa’ papaya seeds treated with plant hormones

Sodium hypochlorite for removal of the sarcotesta from newly extracted and stored papaya seeds

Morphological changes and quality of papaya seeds as correlated to their location within the fruit and ripening stages

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