Emprego do método RAPD na análise de diversidade genética em linhagens de fungos causadores de podridões do tronco da videira.

Uma abordagem para investigar a variabilidade genética em diferentes espécies de fungos causadores de podridão do tronco da videira isolados no Rio Grande do Sul foi experimentada por sua facilidade e praticidade: o RAPD (Random Amplified Polymorphic DNA). O RAPD auxilia na identificação e caracterização da diversidade genética em linhagens de fitopatógenos. Para isso, uma coleção de trabalho com diferentes espécies foi selecionada a partir da confirmação de seus produtos de PCR, sequenciamento e BLASTn

Detecção de isolados do Grapevine fanleaf virus em videiras por meio de testes sorológico e molecular.

A degenerescência da videira, causada pelo Grapevine fanleaf virus (GFLV), ocorre na maioria dos países vitícolas, causando relevantes danos

UCP4C mediates uncoupled respiration in larvae of Drosophila melanogaster

Larvae of Drosophila melanogaster reared at 23\ub0C and switched to 14\ub0C for 1 h are 0.5\ub0C warmer than the surrounding medium. In keeping with dissipation of energy, respiration of Drosophila melanogaster larvae cannot be decreased by the F-ATPase inhibitor oligomycin or stimulated by protonophore. Silencing of Ucp4C conferred sensitivity of respiration to oligomycin and uncoupler, and prevented larva-to-adult progression at 15\ub0C but not 23\ub0C. Uncoupled respiration of larval mitochondria required palmitate, was dependent on Ucp4C and was inhibited by guanosine diphosphate. UCP4C is required for development through the prepupal stages at low temperatures and may be an uncoupling protein

Relationship between symptom expression and viral infection in grapevines cv. Cabernet sauvignon.

Cultivars of Vitis vinifera (wine grape) are usually more sensitive to viruses compared to cvs. of V. labrusca (common grape) and hybrids that are tolerant to viruses.Evento online

Mammalian RAD52 Functions in Break-Induced Replication Repair of Collapsed DNA Replication Forks

Human cancers are characterized by the presence of oncogene-induced DNA replication stress (DRS), making them dependent on repair pathways such as break-induced replication (BIR) for damaged DNA replication forks. To better understand BIR, we performed a targeted siRNA screen for genes whose depletion inhibited G1 to S phase progression when oncogenic cyclin E was overexpressed. RAD52, a gene dispensable for normal development in mice, was among the top hits. In cells in which fork collapse was induced by oncogenes or chemicals, the Rad52 protein localized to DRS foci. Depletion of Rad52 by siRNA or knockout of the gene by CRISPR/Cas9 compromised restart of collapsed forks and led to DNA damage in cells experiencing DRS. Furthermore, in cancer-prone, heterozygous APC mutant mice, homozygous deletion of the Rad52 gene suppressed tumor growth and prolonged lifespan. We therefore propose that mammalian RAD52 facilitates repair of collapsed DNA replication forks in cancer cells. © 2016 The Author(s