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Chitosan derivatives induce local and distal expression of defence-related genes in wheat (Triticum aestivum L.) seedlings Agrociencia
Díaz-Martínez,Juan M.; Aispuro-Hernández,Emmanuel; Vargas-Arispuro,Irasema; Falcón-Rodríguez,Alejandro B.; Martínez-Téllez,Miguel Á..
Abstract Chitosan and its derivatives are elicitors of defence responses in plants. The physical and chemical characteristics, like the molecular weight and acetylation degree determine the type of effect and specificity. Although chitosan-induced biochemical and enzymatic reactions in wheat (Triticum aestivum) are reported, the transcriptional activation of defensive markers by chitosan derivatives remains unaddressed. The hypothesis of our study was that the different structural features of chitosan derivatives would influence the transcriptional patterns related to protective responses in wheat. The aim of our study was to compare the local and systemic inductive properties of chitosan and chitooligosaccharides (COS) in wheat seedlings through the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chitinase; Chitooligosaccharide; Glucanase; Phenylalanine ammonia-lyase; Systemic resistance.
Ano: 2018 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952018000400497
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Control of brown spot pathogen of rice (Bipolaris oryzae) using some phenolic antioxidants BJM
Shabana,Y.M.; Abdel-Fattah,G.M.; Ismail,A.E.; Rashad,Y.M..
Bipolaris oryzae is the causal agent of rice brown spot disease and is responsible for significant economic losses. In order to control this disease, three phenolic antioxidants were tested (salicylic acid, benzoic acid and hydroquinone). The antifungal activity of the tested substances were investigated against B. oryzae at different concentrations in vitro, as well as the efficacy of their exogenous application in controlling rice brown spot disease under field conditions. In vitro, benzoic acid or salicylic acid at 9 mM completely inhibited the growth of B. oryzae. Under field conditions, spraying of benzoic acid at 20 mM led to a significant reduction in disease severity (DS) and disease incidence (DI) on the plant leaves, in addition to a significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benzoic acid; Bipolaris oryzae; Hydroquinone; Salicylic acid; Systemic resistance.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300006
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