Photosynthetic gas exchange and antioxidative system in common bean plants infected by Colletotrichum lindemuthianum and supplied with silicon
dc.contributor.author | Polanco, Leonora R. | |
dc.contributor.author | Rodrigues, Fabrício A. | |
dc.contributor.author | Nascimento, Kelly J. T. | |
dc.contributor.author | Cruz, Maria F. A. | |
dc.contributor.author | Curvelo, Carmen R. S. | |
dc.contributor.author | Vale, Francisco X. R. | |
dc.date.accessioned | 2019-09-25T14:39:38Z | |
dc.date.available | 2019-09-25T14:39:38Z | |
dc.date.issued | 2014-01 | |
dc.description.abstract | This study investigated the effects of silicon (Si) on the resistance of common bean plants to anthracnose caused by Colletotrichum lindemuthianum. The plants were grown in a nutrient solution containing 0 (control) or 2 mM Si (+Si) and both photosynthesis and antioxidative metabolism levels were evaluated. The Si concentrations in the leaf tissues of +Si plants increased by 33% in comparison to those of control plants. Anthracnose severity was reduced by 34% in +Si plants in comparison to control plants. The net carbon assimilation rate, stomatal conductance to water vapor and transpiration rate values were significantly higher in +Si plants than in control plants. The activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione reductase (GR) tended to be higher in +Si plants than in control plants. The hydrogen peroxide concentration was significantly lower in +Si plants than in control plants. In conclusion, the Si supply was associated with lower anthracnose severity and up-regulation of antioxidant enzymes, which in turn might be associated with better gas exchange in +Si plants. The impaired photosynthetic performance in +Si plants was associated with stomatal limitations, whereas in control plants those impairments likely reflected dysfunctions at the level of biochemical reactions involved in CO2 fixation. | en |
dc.format | pt-BR | |
dc.identifier.issn | 1983-2052 | |
dc.identifier.uri | http://dx.doi.org/10.1590/S1982-56762014000100005 | |
dc.identifier.uri | https://locus.ufv.br//handle/123456789/27138 | |
dc.language.iso | eng | pt-BR |
dc.publisher | Tropical Plant Pathology | pt-BR |
dc.relation.ispartofseries | v. 39, n. 01, p. 35- 42, jan./ fev. 2014 | pt-BR |
dc.rights | Open Access | pt-BR |
dc.subject | Colletotrichum lindemuthianum | pt-BR |
dc.subject | Antioxidative enzymes | pt-BR |
dc.subject | Foliar disease | pt-BR |
dc.subject | Mineral nutrition | pt-BR |
dc.subject | Photosynthesis | pt-BR |
dc.title | Photosynthetic gas exchange and antioxidative system in common bean plants infected by Colletotrichum lindemuthianum and supplied with silicon | en |
dc.type | Artigo | pt-BR |