Publications by authors named "Patricia Ricardino Silveira"
Article Synopsis
- The study investigates fungicide resistance in Alternaria alternata populations, specifically identifying the G143A mutation in cytochrome b (cytb) linked to resistance in Brazilian orchards.
- Using techniques like confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM), researchers examined the behavior of resistant (QoI-R) and sensitive (QoI-S) isolates when exposed to the QoI fungicide pyraclostrobin.
- Findings indicate that QoI-S conidia produced reactive oxygen species (ROS) and showed cell death, while QoI-R conidia did not, illustrating distinct responses between the two phenotypes during interactions with the fungicide.
Background: Quinone outside inhibitor (QoI) fungicides have not been effective in controlling the wheat blast disease [Pyricularia oryzae Triticum lineage (PoTl)] in Brazil. The first report of resistance of PoTl to QoIs in this country occurred in 2015. This study aimed to test hypotheses about the changes in fitness parameters and competitive advantage of the QoI-resistant (R) PoTl isolate group compared to the sensitive (S) isolate group.
View Article and Find Full Text PDFThe infection of wheat leaves by Pyricularia oryzae induced remarkable reprogramming of the primary metabolism (amino acids, sugars, and organic acids) in favor of a successful fungal infection and certain changes were conserved among cultivars regardless of their level of resistance to blast. Wheat blast, caused by Pyricularia oryzae, has become one of the major threats for food security worldwide. Here, we investigated the behavior of three wheat cultivars (BR-18, Embrapa-16, and BRS-Guamirim), differing in their level of resistance to blast, by analyzing changes in cellular damage, antioxidative metabolism, and defense compounds as well as their photosynthetic performance and metabolite profile.
View Article and Find Full Text PDF