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Cruz,Maria Fernanda Antunes da; Rodrigues,Fabrício Ávila; Polanco,Leonora Rodriguez; Curvêlo,Carmen Rosa da Silva; Nascimento,Kelly Juliane Telles; Moreira,Maurílio Alves; Barros,Everaldo Gonçalves. |
This study aimed to determine the effect of jasmonic acid (JA), Acibenzolar-S-Methyl (ASM) and calcium silicate (a source of soluble silicon, Si), on the potentiation of soybean resistance to Asian soybean rust (ASR). The ASR severity was significantly reduced on plants sprayed with ASM or supplied with Si in comparison to plants sprayed with JA or deionized water. For chitinases (CHI), significant differences in activity between non-inoculated and inoculated plants sprayed with deionized water or with ASM occurred at 72 hours after inoculation (hai), at 24 and 72 hai when sprayed with JA and at 141 hai when supplied with Si. For β-1,3-glucanases (GLU), significant differences in activity between non-inoculated and inoculated plants sprayed with deionized... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Asian soybean rust; Induction of resistance; Mechanisms of host defense. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052013000200008 |
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Nascimento,Kelly Juliane Telles; Araujo,Leonardo; Resende,Renata Sousa; Schurt,Daniel Augusto; Silva,Washington Luís da; Rodrigues,Fabrício de Ávila. |
ABSTRACT This study investigated the effects of silicon (Si), acibenzolar-S-methyl (ASM), and potassium phosphite (Phi) on the potentiation of rice resistance to infection by Bipolaris oryzae. The treatments included the soil amended with Si (1.25 g of calcium silicate per kg of soil), spraying of plants with ASM (500 mg∙L–1), Phi (5 mL∙L–1), and distilled water (control) 24 h before inoculation with B. oryzae. The treatments Si supply and the spraying of ASM and Phi were effective in reducing the area under brown spot progress curve and the number of lesions per cm2 of leaf. Polyphenoloxidases activity was higher for plants supplied with Si. On plants sprayed with ASM, the activities of polyphenoloxidases, phenylalanine ammonia-lyases, chitinases, and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bipolaris oryzae; Oryza sativa; Host defense responses; Induction of resistance; Phenylpropanoids; PR-proteins. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200212 |
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