Insulina e glicose como moduladores do desenvolvimento de plântulas de milho doce (Su1)

Júnior, Luiz Fernando Ganassali Oliveira; Bressan-Smith, Ricardo; Oliveira, Antônia Elenir Amâncio; Pereira, Messias Gonzaga; Silva, Luciana Belarmindo; Viana, Leandro Hespanhol; Vieira, Henrique Duarte

doi:10.1590/s0102-33062009000300014

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…seeds, Arenas-Huertero et al (2000) observed the influence of glucose on plant development and seed germination, and Price et al (2003) pointed out that this sugar source reduces the effect of ABA, accelerating germination. Such reduction of ABA is essential for germination to occur since the high concentration of this hormone inhibits embryo development (OLIVEIRA JÚNIOR et al, 2009). These findings corroborate the results obtained in the present study for U. brizantha seeds, in which increasing glucose concentrations improved the percentage of germinated seeds and, if compared to the other sugar sources, this effect may be even higher for certain concentrations.…”

Section: Resultssupporting

confidence: 91%

Priming of Brachiaria Seeds With Different Sugar Sources and Concentrations

Batista

Binotti

et al. 2018

Rev. Caatinga

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Seed priming is a practice for improving the expression of seed physiological potential. Such technique consists of synchronizing and reducing the time of seed germination by controlled hydration. The aim of this study was to evaluate the effect of seed-priming with different sugar sources and concentrations on the physiological quality Urochloa brizantha seeds and initial seedling performance. Before treating, seeds were scarified chemically with concentrated sulphuric acid (H2SO4) for 5 minutes to overcome physical dormancy. The experimental design was completely randomized in a 3 x 6 factorial scheme consisting of priming using three sugar sources (glucose, sucrose, and maltose) and six concentrations (zero [water control], 2%, 5%, 10%, 15%, and 20%), with four replicates. The seeds were primed by direct immersion for 2 hours at 25 ºC and, after hydration, they were dried for moisture equilibrium recovery. Seed germination, vigor, viability, and initial seedling growth were evaluated. The results showed that glucose was the source able to promote beneficial effects on the germination of U. brizantha cv. MG-5 seeds. Moreover, the supply of glucose at the concentrations of 2 and 5% for physiological conditioning increased seedling dry phytomass.

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Section: Resultssupporting

confidence: 91%

Priming of Brachiaria Seeds With Different Sugar Sources and Concentrations

Batista

Binotti

et al. 2018

Rev. Caatinga

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“…When comparing distinct genotypes of Zea mays, the genotypes which had a higher endogenous glycose content were those which had higher germination and initial seedling development (Oliveira Júnior et al, 2009). The authors emphasized that glycose exerts a strong influence on the germination process, reducing the effect of ABA on the inhibition of hydrolytic enzyme synthesis, favoring activation of the α-amylase enzyme.…”

Section: Resultsmentioning

confidence: 99%

Activities of α-galactosidase and polygalacturonase during hydration of Dalbergia nigra ((Vell.) Fr All. ex Benth.) seeds at different temperatures

et al. 2013

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-Germination is a process that begins with seed water uptake, stimulating enzyme synthesis or activating enzymes already present. The objective of this study was to evaluate variations in monosaccharide reserves and the activities of the α-galactosidase and polygalacturonase enzymes during the hydration of two lots of Dalbergia nigra (Bahia Rosewood) seeds. Seeds from different origins constituted the two lots I and II, classified as high and low vigor, respectively. Both lots were placed in desiccators with a high relative humidity to hydrate and at 15 and 25 °C until levels of 10, 15, 20 and 25% moisture levels in seeds were reached. The seed cotyledons were analyzed for the quantity of monosaccharides and enzyme activity. The control had higher concentrations of xylose and rhamnose, which decreased during hydration until the 15% level was reached, after which concentrations increased again in both lots. Lot I, with a superior quality, showed higher glucose synthesis and degradation during seed hydration. Both enzymes were pre-existing since activity was already present in the seeds without imbibition. The polygalacturonase enzyme increased and the α-galactosidase enzyme remained relatively constant during seed hydration.Index terms: imbibition, Bahia Rosewood, biochemical modifications, monosaccharides.Atividades de α-galactosidase e poligalacturonase durante a hidratação de sementes de Dalbergia nigra ((Vell.) Fr. All. ex Benth.) sob diferentes temperaturas RESUMO -A germinação é um processo que se inicia com a absorção de água pelas sementes, estimulando a síntese de enzimas ou ativação daquelas pré-existentes. O objetivo deste trabalho foi estudar as variações nas reservas de monossacarídeos e atividades das enzimas α-galactosidase e poligalacturonase durante a hidratação de sementes de dois lotes de Dalbergia nigra (jacarandá-da-Bahia). Para tanto, sementes de duas procedências constituíram os lotes I e II, classificados como de alto e baixo vigor, respectivamente. Os lotes foram colocados para hidratar em dessecadores com alta umidade relativa nas temperaturas de 15 e 25 °C até atingirem os níveis de hidratação de 10, 15, 20 e 25% de umidade nas sementes. Os teores de monossacarídeos e as atividades das enzimas foram analisados nos cotilédones das sementes. Os teores de ramnose e xilose apresentaram valores superiores na testemunha, com redução durante a hidratação até 15%, momento a partir do qual aumentaram novamente, em ambos os lotes. O lote I, de qualidade superior, possui maior síntese e degradação de glicose durante a hidratação das sementes. Ambas as enzimas mostraram ser pré-formadas, por já apresentarem atividade nas sementes sem embebição. A poligalacturonase aumentou e a α-galactosidase manteve-se relativamente constante durante a hidratação das sementes.

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“…. Essa atividade é evidentemente associada à ação antioxidante do extrato (Pandey, Agrawal & Maheshwari, 2012). Mishra e cola-…”

Section: Atividade Diuréticaunclassified

Monografias de Plantas Medicinais Brasileiras e Aclimatadas: Volume II

Gilbert¹,

Alves²,

Favoreto³

2022

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O presente volume contém monografias completas de 11 plantas medicinais amplamente empregadas no país, sendo apenas duas exóticas. Nenhuma dessas espécies possui monografia farmacopeica nas seis edições já publicadas da Farmacopeia Brasileira; portanto, é significativa a contribuição desta obra para o desenvolvimento de fitoterápicos, importantes para a Atenção Primária à Saúde, principalmente quando se considera que 82% da população brasileira utiliza produtos à base de plantas medicinais.

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Insulina e glicose como moduladores do desenvolvimento de plântulas de milho doce (Su1)

Cited by 4 publications

References 27 publications

Priming of Brachiaria Seeds With Different Sugar Sources and Concentrations

Priming of Brachiaria Seeds With Different Sugar Sources and Concentrations

Activities of α-galactosidase and polygalacturonase during hydration of Dalbergia nigra ((Vell.) Fr All. ex Benth.) seeds at different temperatures

Monografias de Plantas Medicinais Brasileiras e Aclimatadas: Volume II

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