English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Sementes de milho tornam-se tolerantes à dessecação à medida que secam naturalmente no campo e, após a maturidade fisiológica, pré-secagem a 35ºC pode induzir tolerância à temperatura de secagem de 50ºC. Nesse trabalho, sementes da cultivar BRS-3060, colhidas com teor de água de 42,2%, submetidas a períodos crescentes de pré-condicionamento apresentaram tolerância crescenteà temperatura de 50ºC, até atingirem o teor de água de 25,9%, quando exibiram o máximo desempenho fisiológico, avaliado por meio de testes de germinação, vigor e atividade de enzimas a-amilase. O presente trabalho teve o objetivo de investigar o padrão eletroforético de enzimas removedoras de radicais livres e de proteínas lea, em sementes tolerantes e intolerantes a alta temperatura de secagem. As atividades das enzimas removedoras superóxido dismutase, peroxidase e catalase, foram detectadas em hipocótilos de plântulas após cinco dias de germinação e a atividade de proteínas lea detectada em eixos embrionários. Os resultados permitiram concluir que a tolerância de sementes de milho à temperatura de 50ºC está associada à atividade da enzima catalase e pouco relacionada à atividade das enzimas superóxido dismutase e peroxidase. Proteínas lea estavam ausentes em sementes de milho intolerantes e sua presença foi associada ao desempenho fisiológico das sementes tolerantes. Maize seeds assume desiccation tolerance as they dry naturally during maturation and pre drying at 35ºC after their physiological maturity can induce tolerance to artificial drying at 50ºC. Seeds of 'BRS-3060' harvested with 42,2% water content and submitted to increased periods of pre-conditioning, showed enhanced tolerance to 50ºC until 25,9% water content when they reached maximum physiological performance. Seed quality was evaluated by germination and vigor tests and a-amilase enzyme activity. Seeds tolerant and not-tolerant to drying at 50ºC were investigated by means of electrophoretic standards of free radical-scavenging enzymes and lea proteins. The scavenger activity enzyme superoxide dismutase, peroxidase and catalase was detected in 5-day old seedling hypocotyl and lea protein was detected in embryonic axes. The results showed that maize seeds tolerant to 50ºC are associated to catalase enzyme activity but are less related to superoxide dismutase and peroxidase enzymes activities. Lea proteins were not present in maize seeds non tolerant to desiccation and their presence was associated to the physiological performance of tolerant seeds

Enzimas removedoras de radicais livres e proteínas lea associadas à tolerância de sementes milho à alta temperatura de secagem