Production of Antagonistic Compounds by Bacillus sp. with Antifungal Activity against Heritage Contaminating Fungi

Silva, Mara; Rosado, Tânia; González‐Pérez, Marina; Gobbo, Débora; Teixeira, Dora Martins; Candeias, António; Caldeira, Ana Teresa

doi:10.3390/coatings8040123

Cited by 6 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cellulose can react with these acids at room temperature, triggering a hydrolysis process inside the polysaccharide chains, that leads to the scission of original cellulose structures, making the textile less resistant [9][10][11]. Constant exposure to high humidity can also promote microbial/bacterial growth and proliferation [12][13][14]. When insects and microorganisms attack a textile, they rapidly degrade it through enzymatic reactions by releasing excrements [15,16].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and hydrophobic Cotton fabric resisting accelerated ageing

Mazzon

Contardi

Quilez‐Molina

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Antioxidant and hydrophobic Cotton fabric resisting accelerated ageing

Mazzon

Contardi

Quilez‐Molina

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

“…Besides, the local heterotrophic microflora (i.e., Bacillus, Micromonospora , and Micrococcus species) can produce secondary metabolites with antimicrobial properties as a defence mechanism under stress conditions 34 , 67 – 69 . Thus, Firmicutes and Actinobacteria could act as biocontrol agents for the preservation of cultural heritage 34 .…”

Section: Resultsmentioning

confidence: 99%

A combined physical–chemical and microbiological approach to unveil the fabrication, provenance, and state of conservation of the Kinkarakawa-gami art

Piacenza

Presentato

Salvo

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Kinkarakawa-gami wallpapers are unique works of art produced in Japan between 1870 and 1905 and exported in European countries, although only few examples are nowadays present in Europe. So far, neither the wallpapers nor the composing materials have been characterised, limiting the effective conservation–restoration of these artefacts accounting also for the potential deteriogen effects of microorganisms populating them. In the present study, four Kinkarakawa-gami wallpapers were analysed combining physical–chemical and microbiological approaches to obtain information regarding the artefacts’ manufacture, composition, dating, and their microbial community. The validity of these methodologies was verified through a fine in blind statistical analysis, which allowed to identify trends and similarities within these important artefacts. The evidence gathered indicated that these wallpapers were generated between 1885 and 1889, during the so-called industrial production period. A wide range of organic (proteinaceous binders, natural waxes, pigments, and vegetable lacquers) and inorganic (tin foil and pigments) substances were used for the artefacts’ manufacture, contributing to their overall complexity, which also reflects on the identification of a heterogeneous microbiota, often found in Eastern environmental matrices. Nevertheless, whether microorganisms inhabiting these wallpapers determined a detrimental or protective effect is not fully elucidated yet, thus constituting an aspect worth to be explored to deepen the knowledge needed for the conservation of Kinkarakawa-gami over time.

show abstract

“…For instance, biocides, namely benzalkonium chloride ( Li T. et al, 2020 ) and octylisothiazolinone ( Sanmartin and Carballeira, 2021 ) were used to eliminate microorganisms from wall paintings. In addition, green and safe materials have been developed for heritage conservation, such as nanomaterials ( La Russa et al, 2016 ), plant extracts ( Favero-Longo et al, 2022 ), and microbial secondary metabolites ( Silva et al, 2018 ). Physical, chemical, and biochemical methods of controlling the growth of microorganisms in cultural heritage have their advantages and disadvantages.…”

Section: Discussionmentioning

confidence: 99%

Exploring the key deteriorative microorganisms on ancient ivories unearthed from the Sanxingdui Ruins site during temporary cold storage

Lao,

Zhou,

et al. 2024

Front. Microbiol.

View full text Add to dashboard Cite

IntroductionThe ancient ivories unearthed from the Sanxingdui Ruins site are valuable cultural relics, however, the microbial biodeterioration on ivories during temporary cold storage poses a great threat to their later long-term preservation.MethodsHere, the combination of high-throughput sequencing and biochemical assays was applied for the in-depth investigation of the key deteriorative microorganisms colonizing on the ivories and the tracing of their origin, as well as the assessment of the ethanol disinfection impact on the microbial communities on ivories.ResultsIt was observed that the surfaces of ivories were scattered by the fungal patches of white, dark grey, and hedge green colors during cold storage. The high-throughput sequencing results showed that the genera Mortierella (38.51%), Ilyonectria (14.43%), Penicillium (1.15%), and Aspergillus (1.09%) were the dominant fungi, while Pseudomonas (22.63%), Sphingopyxis (3.06%), and Perlucidibaca (2.92%) were the dominant bacteria on ivories. The isolated Aspergillus A-2 resulted in the highest amount of calcium releasing from the degradation of hydroxyapatite (HAP), the main component of ivory, by the organic acids produced, including oxalic acid and citric acid. The fast expectation-maximization for microbial source tracking (FEAST) analysis revealed that the majority of the fungi (57.45%) and bacteria (71.84%) colonizing on the ivories were derived from the soils surrounding ivories in the sacrifice pits, indicating soils as the primary source for the spoilage microbes growing on ivories. The dominant strains could degrade cellulose, the key components of wet cotton towels commonly applied on ivories for moisture maintenance, aiding the spoilage microbes colonizing on ivories. Notably, the ivory disinfection with 75% ethanol during the cleansing significantly decreased the relative abundance of the dominant genera of Ilyonectria, Aspergillus, and Pseudomonas, with Mortierella becoming the dominant one on ivories.DiscussionTogether, the fungi, particularly Aspergillus and Penicillium, played a significant role in the microbial biodeterioration of unearthed ancient ivories by producing the organic acids. These results may improve the control of the microbial biodeterioration and develop more efficient strategies for the long-time conservation of unearthed ancient ivories and other cultural relics.

show abstract

Production of Antagonistic Compounds by Bacillus sp. with Antifungal Activity against Heritage Contaminating Fungi

Cited by 6 publications

References 24 publications

Antioxidant and hydrophobic Cotton fabric resisting accelerated ageing

Antioxidant and hydrophobic Cotton fabric resisting accelerated ageing

A combined physical–chemical and microbiological approach to unveil the fabrication, provenance, and state of conservation of the Kinkarakawa-gami art

Exploring the key deteriorative microorganisms on ancient ivories unearthed from the Sanxingdui Ruins site during temporary cold storage

Contact Info

Product

Resources

About