Condicionamento de sementes de milho com luz ultravioleta para mitigação do estresse salino

Autores

DOI:

https://doi.org/10.5902/2179460X89295

Palavras-chave:

Conditioning, Germination, Radiation, Salinity, Ultraviolet, Zea mays

Resumo

O priming de sementes em luz ultravioleta é considerado um método eficaz no tratamento de sementes, podendo promover a germinação e o desenvolvimento sincronizados, contribuindo para um melhor desempenho na mitigação dos efeitos negativos causados por estresses abióticos. Assim, este estudo teve como propósito analisar o impacto do condicionamento de sementes de milho com luz ultravioleta-C sob estresse induzido por sal. As sementes foram expostas a duas doses de UV-C e cloreto de sódio. A semeadura ocorreu em papel germitest e os rolos foram mantidos em câmara de germinação (25 ±2 °C e fotoperíodo de 12 horas). Foram avaliados parâmetros de germinação e crescimento das plântulas. A alta concentração salina resultou em menor percentagem de germinação e crescimento inicial das plântulas. A pré-exposição das sementes de milho à radiação UV-C mostrou-se eficaz na atenuação dos efeitos prejudiciais do excesso de sal, tanto na germinação das sementes (3,42 kJ m-2) quanto no crescimento das plântulas (0,85 e 3,42 kJ m-2). Assim, pode-se concluir que a aplicação de luz UV-C no condicionamento das sementes de milho pode ser uma estratégia promissora para mitigar os efeitos adversos decorrentes de altas concentrações de sal.

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Biografia do Autor

Raquel Stefanello, Universidade Federal de Santa Maria

Doutorado em Agronomia pela Universidade Federal de Santa Maria

Raissa Tainá Puntel, Universidade Federal de Santa Maria

Ensino Profissional de nível técnico em Técnico em Agropecuária pela Universidade Federal de Santa Maria.

Wagner Jesus da Silva Garcia, Universidade Federal de Santa Maria

Doutorado em Física pela Universidade Federal de Santa Maria.

Lucio Strazzabosco Dorneles, Universidade Federal de Santa Maria

Doutorado em Física pela Universidade Federal de Santa Maria.

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Publicado

2025-04-04

Como Citar

Stefanello, R., Puntel, R. T., Garcia, W. J. da S., & Dorneles, L. S. (2025). Condicionamento de sementes de milho com luz ultravioleta para mitigação do estresse salino. Ciência E Natura, 47, e89295 . https://doi.org/10.5902/2179460X89295

Edição

Seção

Meio Ambiente

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