The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora.

Myxomycetes do estado de Alagoas (Brasil) e notas sobre sua distribuição. O estado de Alagoas, localizado na Região Nordeste do Brasil, abrange uma área de 27.767 km 2 onde diferentes ecossistemas, incluindo manguezal e Floresta Atlântica na costa e caatinga no interior, são encontrados. A literatura relata a ocorrência de 4 esp cies de Myxomycetes no estado, as uais foram registradas em ambientes orestais midos ou em baga o de cana de a car armazenado em ind stria. Este estudo o primeiro a registrar esp cies de Didymiaceae e os gêneros Badhamia, Comatricha, Perichaena, Reticularia e Stemonaria para Alagoas. É apresentada uma chave para espécies. Licea succulenticola, Reticularia jurana e Stemonaria longa são novas referências para o bioma Caatinga. Licea succulenticola é registrada pela primeira vez no Brasil.

No abstract

Corticolous myxomycetes are a distinct ecological group consisting of species typically associated with the outer bark surface of living trees. The current study aimed to characterize the community structure of corticolous myxomycetes and their associated trees, analyzing the influence of geographic distance, bark pH, and tree diameter on myxomycete assemblages in a Neotropical Seasonal Dry Tropical Forest (SDTF) in Brazil. The myxomycete community composition significantly varied with the increase of the geographic distance between the studied plots, and tree bark pH was able to explain the species composition exclusively recorded in one of the three transects.

2002 ResumoUtilizando-se o teste de difusão em meio sólido, detectou-se atividade antibacteriana em extratos de Physarella oblonga (Physaraceae) obtidos a partir de imobilização plasmodial e do plasmódio in natura. Os extratos foram ativos contra Staphylococcus aureus (halos=14 mmf) e Mycobacterium smegmatis (halos=12 mmf e 13 mmf). Menor inibição foi observada frente a Bacillus subtilis (halos=10 mmf e 9 mmf) e Pseudomonas aeruginosa (halos=10 mmf e 8 mmf). Escherichia coli apresentou resistência a todos os extratos testados. O cromatograma evidenciou semelhanças na composição química dos extratos, justificando as similaridades no potencial inibitório de ambos, sendo as substâncias com Rf 0,91 e 0,82, presentes em ambas as amostras, os prováveis inibidores do crescimento bacteriano. AbstractDiffusion solid medium test was used to detect antibacterial activity in Physarella oblonga (Physaraceae) extracts obtained from plasmodial immobilization and in natura plasmodium. The extracts presented activity against Staphylococcus aureus (halos=14 mmf) and Mycobacterium smegmatis (halos=12 mmf e 13 mmf). Slower inhibition was obtained against Bacillus subtilis (halos=10 mmf e 9 mmf) and Pseudomonas aeruginosa (halos=10 mmf e 8 mmf). Escherichia coli presented resistence to all tested extracts. The chromatogram revealed likeness in the chemical composition of the extracts, explaining similarities in inhibitory potential. The substances with Rf 0,91 and 0,82, present in both extracts, could be inhibitor agents of bacterial growth.Os mixomicetos sintetizam substâncias com atividade biológica, sendo referidas como inibidoras da germinação de sementes e raízes de vegetais superiores, e de microrganismos patogênicos, principalmente bactérias Gram-positivas e