Spray Drying of Coloring Extracts Produced by Fungi Isolated from Brazilian Caves

Souza, Patrícia Nirlane da Costa; Tavares, Dérica Gonçalves; Souza, C. R. F.; Martinez, Márcio Luís Lombardi; Oliveira, Wanderley Pereira de; Guimarães, Luís Henrique Souza; Cardoso, Patrícia Gomes

doi:10.1590/1678-4324-2020190024

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…The environmental differences between tropical and temperate caves directly influenced the microbial communities within subterranean system. Tropical caves are a particularly understudied environment, and most of what we know about microbial communities was based on studies using culture-dependent methods [44 – 47]. While there are some published results generated by culture-independent approaches [6, 48], this is the first comprehensive study reporting the microbiome composition from a tropical cave, including prokaryotic and fungal assemblages through next generation sequencing.…”

Section: Discussionmentioning

confidence: 99%

First Report of Halobacteria Dominance in a Tropical Cave Microbiome

Paula

Sirová

Sarmento

et al. 2021

Preprint

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Scarce studies on microbial diversity in tropical caves have been published, a subterranean system still neglected from a microbiological point of view. Although most published studies are about temperate caves, usually archaeas and fungi have less attention than bacterial communities. Here, the microbiome structure and composition in a tropical cave system, as well the main environmental drivers, were studied during the wet and dry season. Soil and sediments from three different habitats at the cave (surface, entrance cave and dark zone) were sampled. Samples were characterized (temperature, air and substrate humidity, salinity, pH, nitrogen and organic carbon content, and chemical composition) and the microbiome was assessed by high-throughput sequencing, using amplicon sequencing (16S and ITS). Prokaryotic communities were dominated by Halobacteria, Actinobacteria and Bacilli, while fungal communities showed high abundance of Sordariomycetes. Microbiomes from the cave entrance, where a significantly elevated salinity levels were found, supported up to 63% of Haloarchaea compared to the other habitats studied. Differences in community structure were significant between habitats, but no influence of the season was observed. Main environmental drivers of community assembly included nitrogen and organic carbon content, temperature, and salinity. This is the first report of Halobacteria dominance in cave habitats, where they likely play important roles in nitrogen and phosphorus cycles. The cave entrance had lower diversity, but higher degree of microbial endemism, which characterize it as an important cave ecotone. The prevalence of heterotrophic microbial groups implies trophic structure based on detritivores, particularly in the dark zones. Our study brings new insights on microbiome composition in the underexplored tropical cave habitats.

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Section: Discussionmentioning

confidence: 99%

First Report of Halobacteria Dominance in a Tropical Cave Microbiome

Paula

Sirová

Sarmento

et al. 2021

Preprint

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“…Souza et al [81] used starch as an adjuvant for spray drying to encapsulate pigments produced by fungi isolated from caves in Brazil, which leads to high pigment retention and could improve the stability of the compound during storage. Ribeiro et al [82] used blends of starch, gum arabic, and maltodextrin to encapsulate vitamin A, and observed that the presence of starch in the blend led to a slower release rate of the molecule.…”

Section: Food Applicationsmentioning

confidence: 99%

Starch as a Matrix for Incorporation and Release of Bioactive Compounds: Fundamentals and Applications

et al. 2022

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Due to its abundance in nature and low cost, starch is one of the most relevant raw materials for replacing synthetic polymers in a number of applications. It is generally regarded as non-toxic, biocompatible, and biodegradable and, therefore, a safe option for biomedical, food, and packaging applications. In this review, we focused on studies that report the use of starch as a matrix for stabilization, incorporation, or release of bioactive compounds, and explore a wide range of applications of starch-based materials. One of the key application areas for bioactive compounds incorporated in starch matrices is the pharmaceutical industry, especially in orally disintegrating films. The packaging industry has also shown great interest in using starch films, especially those with antioxidant activity. Regarding food technology, starch can be used as a stabilizer in nanoemulsions, thus allowing the incorporation of bioactive compounds in a variety of food types. Starch also presents potential in the cosmetic industry as a delivery system. However, there are still several types of industry that could benefit from the incorporation of starch matrices with bioactive compounds, which are described in this review. In addition, the use of microbial bioactive compounds in starch matrices represents an almost unexplored field still to be investigated.

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