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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Dry Priming of Maize Seeds Reduces Aluminum Stress

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Autor(es):
Alcantara, Berenice Kussumoto [1] ; Machemer-Noonan, Katja [2] ; Silva Junior, Francides Gomes [3] ; Azevedo, Ricardo Antunes [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Genet, Escola Super Agr Luiz de Queiroz, Sao Paulo - Brazil
[2] Ohio State Univ, Ctr Appl Plant Sci, Columbus, OH 43210 - USA
[3] Univ Sao Paulo, Dept Ciencias Florestais, Escola Super Agr Luiz de Queiroz, Sao Paulo - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: PLoS One; v. 10, n. 12 DEC 29 2015.
Citações Web of Science: 9
Resumo

Aluminum (Al) toxicity is directly related to acidic soils and substantially limits maize yield. Earlier studies using hormones and other substances to treat the seeds of various crops have been carried out with the aim of inducing tolerance to abiotic stress, especially chilling, drought and salinity. However, more studies regarding the effects of seed treatments on the induction of Al tolerance are necessary. In this study, two independent experiments were performed to determine the effect of ascorbic acid (AsA) seed treatment on the tolerance response of maize to acidic soil and Al stress. In the first experiment (greenhouse), the AsA seed treatment was tested in B73 (Al-sensitive genotype). This study demonstrates the potential of AsA for use as a pre-sowing seed treatment (seed priming) because this metabolite increased root and shoot growth under acidic and Al stress conditions. In the second test, the evidence from field experiments using an Al-sensitive genotype (Mo17) and an Altolerant genotype (DA) suggested that prior AsA seed treatment increased the growth of both genotypes. Enhanced productivity was observed for DA under Al stress after priming the seeds. Furthermore, the AsA treatment decreased the activity of oxidative stress-related enzymes in the DA genotype. In this study, remarkable effects using AsA seed treatment in maize were observed, demonstrating the potential future use of AsA in seed priming. (AU)

Processo FAPESP: 09/54676-0 - Estresse oxidativo induzido por metais: novas abordagens
Beneficiário:Ricardo Antunes de Azevedo
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 10/50497-0 - Alterações na expressão de genes para lignina e tolerância induzida ao estresse com AI3+ em uma linhagem de milho
Beneficiário:Berenice Kussumoto de Alcântara da Silva
Linha de fomento: Bolsas no Brasil - Doutorado