advertisement
Science News
from research organizations

A detailed look at the microorganisms that colonize, and degrade, a 400-year-old painting

Bacterial spores may be able to halt degradation by outcompeting other microbes

Date:
December 5, 2018
Source:
PLOS
Summary:
What's a feast for the human eye may be a literal feast for microorganisms that colonize works of art, according to a new study. The researchers characterized the microbial community on a 17th century painting and showed that while some microbes destroy such works of art, others might be employed to protect them.
Share:
FULL STORY

Bacteria detected on the painting: Samples were collected from the recto (a, b, c) and the verso (d, e, f) of the painting. a) colonies of Staphylococcus spp. on a Mego agar plate; b) the same Staphylococcus spp. viewed by OM after Gram staining (original magnification 100X) and c) by SEM. d) colonies of Bacillus spp. on a TSA agar plate; e) the same Bacillus spp. viewed by OM after Gram staining (original magnification 100X) and f) SEM.
Credit: Caselli et al., 2018

What's a feast for the human eye may be a literal feast for microorganisms that colonize works of art, according to a new study in the open-access journal PLOS ONE by Elisabetta Caselli of the University of Ferrara, Italy, and colleagues. The researchers characterized the microbial community on a 17th century painting and showed that while some microbes destroy such works of art, others might be employed to protect them.

The wide variety of organic and inorganic materials that comprise a painting, such as canvas, oil, pigments, and varnish, can provide an ideal environment for colonizing bacteria and fungi, increasing the risk for biodegradation. To characterize the microorganisms on one such painting, "Incoronazione della Virgine" by Carlo Bononi, completed in 1620, the authors removed a 4 mm2 section of the painted surface adjacent to a damaged area.

Using a combination of microscopy and microbial culture techniques, the authors identified a variety of microbes which had colonized the painting. They isolated multiple strains of Staphylococcus and Bacillus bacteria as well as filamentous fungi of the Aspergillus, Penicillium, Cladosporium, and Alternaria genera. The authors note that some of the 17th century paint pigments used, notably red lac and red and yellow earths, may be nutrient sources for the microbes. They also tested a decontaminating biocompound which contained spores of three Bacillus bacteria and found that these could inhibit growth of both the bacteria and the fungi isolated from the painting.

The authors conclude that a wide range of bacterial and fungal species may inhabit such ancient paintings, but biocompounds potentially represent a novel approach for preserving works of art at risk of biodegradation.

The authors add: "Clarification of biotederioration processes in artworks is important, as it could help in preventing or solving the associated damages. This study investigated such aspects in a 17th century painting, by analyzing both microbial communities and chemical composition of painting, also evaluating a possible biological way to counteract these phenomena."

Story Source:

Materials provided by PLOS. Note: Content may be edited for style and length.


Journal Reference:

  1. Elisabetta Caselli, Simonetta Pancaldi, Costanza Baldisserotto, Ferruccio Petrucci, Anna Impallaria, Lisa Volpe, Maria D’Accolti, Irene Soffritti, Maddalena Coccagna, Giovanni Sassu, Fabio Bevilacqua, Antonella Volta, Matteo Bisi, Luca Lanzoni, Sante Mazzacane. Characterization of biodegradation in a 17th century easel painting and potential for a biological approach. PLOS ONE, 2018; 13 (12): e0207630 DOI: 10.1371/journal.pone.0207630

Cite This Page:

PLOS. "A detailed look at the microorganisms that colonize, and degrade, a 400-year-old painting: Bacterial spores may be able to halt degradation by outcompeting other microbes." ScienceDaily. ScienceDaily, 5 December 2018. <www.sciencedaily.com/releases/2018/12/181205142713.htm>.
PLOS. (2018, December 5). A detailed look at the microorganisms that colonize, and degrade, a 400-year-old painting: Bacterial spores may be able to halt degradation by outcompeting other microbes. ScienceDaily. Retrieved December 11, 2018 from www.sciencedaily.com/releases/2018/12/181205142713.htm
PLOS. "A detailed look at the microorganisms that colonize, and degrade, a 400-year-old painting: Bacterial spores may be able to halt degradation by outcompeting other microbes." ScienceDaily. www.sciencedaily.com/releases/2018/12/181205142713.htm (accessed December 11, 2018).

RELATED STORIES

FROM AROUND THE WEB

Below are relevant articles that may interest you. ScienceDaily shares links with scholarly publications in the TrendMD network and earns revenue from third-party advertisers, where indicated.
http://www.vxiaotou.com