11 research outputs found
Source correlation of biomarkers in a mangrove ecosystem on Santa Catarina Island in southern Brazil
The R2R3-MYB Transcription Factor Gene Family in Maize
MYB proteins comprise a large family of plant transcription factors, members of which perform a variety of functions in plant biological processes. To date, no genome-wide characterization of this gene family has been conducted in maize (Zea mays). In the present study, we performed a comprehensive computational analysis, to yield a complete overview of the R2R3-MYB gene family in maize, including the phylogeny, expression patterns, and also its structural and functional characteristics. The MYB gene structure in maize and Arabidopsis were highly conserved, indicating that they were originally compact in size. Subgroup-specific conserved motifs outside the MYB domain may reflect functional conservation. The genome distribution strongly supports the hypothesis that segmental and tandem duplication contribute to the expansion of maize MYB genes. We also performed an updated and comprehensive classification of the R2R3-MYB gene families in maize and other plant species. The result revealed that the functions were conserved between maize MYB genes and their putative orthologs, demonstrating the origin and evolutionary diversification of plant MYB genes. Species-specific groups/subgroups may evolve or be lost during evolution, resulting in functional divergence. Expression profile study indicated that maize R2R3-MYB genes exhibit a variety of expression patterns, suggesting diverse functions. Furthermore, computational prediction potential targets of maize microRNAs (miRNAs) revealed that miR159, miR319, and miR160 may be implicated in regulating maize R2R3-MYB genes, suggesting roles of these miRNAs in post-transcriptional regulation and transcription networks. Our comparative analysis of R2R3-MYB genes in maize confirm and extend the sequence and functional characteristics of this gene family, and will facilitate future functional analysis of the MYB gene family in maize
Biochar: pyrogenic carbon for agricultural use: a critical review.
O biocarvĂŁo (biomassa carbonizada para uso agrĂcola) tem sido usado como condicionador do solo em todo o mundo, e essa tecnologia Ă© de especial interesse para o Brasil, uma vez que tanto a ?inspiração?, que veio das Terras Pretas de Ăndios da AmazĂŽnia, como o fato de o Brasil ser o maior produtor mundial de carvĂŁo vegetal, com a geração de importante quantidade de resĂduos na forma de finos de carvĂŁo e diversas biomassas residuais, principalmente da agroindĂșstria, como bagaço de cana, resĂduos das indĂșstrias de madeira, papel e celulose, biocombustĂveis, lodo de esgoto etc. Na Ășltima dĂ©cada, diversos estudos com biocarvĂŁo tĂȘm sido realizados e atualmente uma vasta literatura e excelentes revisĂ”es estĂŁo disponĂveis. Objetivou-se aqui nĂŁo fazer uma revisĂŁo bibliogrĂĄfica exaustiva, mas sim uma revisĂŁo crĂtica para apontar alguns destaques na pesquisa sobre biochar. Para isso, foram selecionados alguns temaschave considerados crĂticos e relevantes e fez-se um ?condensado? da literatura pertinente, mais para orientar as pesquisas e tendĂȘncias do que um mero olhar para o passad
International Consensus Statement on Rhinology and Allergy: Rhinosinusitis
Background: The 5 years since the publication of the first International Consensus Statement on Allergy and Rhinology: Rhinosinusitis (ICARâRS) has witnessed foundational progress in our understanding and treatment of rhinologic disease. These advances are reflected within the more than 40 new topics covered within the ICARâRSâ2021 as well as updates to the original 140 topics. This executive summary consolidates the evidenceâbased findings of the document. Methods: ICARâRS presents over 180 topics in the forms of evidenceâbased reviews with recommendations (EBRRs), evidenceâbased reviews, and literature reviews. The highest grade structured recommendations of the EBRR sections are summarized in this executive summary. Results: ICARâRSâ2021 covers 22 topics regarding the medical management of RS, which are grade A/B and are presented in the executive summary. Additionally, 4 topics regarding the surgical management of RS are grade A/B and are presented in the executive summary. Finally, a comprehensive evidenceâbased management algorithm is provided. Conclusion: This ICARâRSâ2021 executive summary provides a compilation of the evidenceâbased recommendations for medical and surgical treatment of the most common forms of RS