Identification of Fungal Community Associated with Deterioration of Optical Observation Instruments of Museums in Northern Vietnam

Applied Sciences

Pravin Dudhagara¹  Van Duc Nguyen²  Nam Trung Nguyen³  Quyet-Tien Phi³  Cao Cuong Ngo³  Ngoc Tung Quach³  Thi Thanh Xuan Le³  Thi Hanh Nguyen Vu³  Thi Thu Hang Le⁴  Quang Huy Nguyen⁴  Thu Hoai Nguyen⁵  Thi Thu Hong Do⁵ 

[1] Department of Biosciences (UGC-SAP-II & DST-FIST-I), Veer Narmad South Gujarat University, Surat 395007, India;General Department of Technology, Ministry of Defense, Hanoi 100000, Vietnam;Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam;LMI DRISA, Department of Life Sciences, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam;Vietnam-Russia Tropical Centre, Hanoi 100000, Vietnam;

关键词: glass corrosion;    biodeterioration;    optical instruments;    fungal community;    Aspergillus;    Penicillium;   

DOI  :  10.3390/app11125351

来源: DOAJ

【 摘 要 】

Fungi are the most harmful microorganisms responsible for the deterioration of nonmetallic materials such as glass, polymers, and composites. To date, biological aspects of glass deterioration have been poorly investigated. The present study aimed to evaluate the diversity of the fungal community colonizing eyepieces of binoculars collected from museums of the northern provinces of Vietnam and the biodeterioration effects on accurate glass reproductions. A total of 40 isolates belonging to 14 genera were identified based on internal transcribed spacer (ITS) sequencing, morphological features, and maximum likelihood analysis. The most abundant fungal genera included Aspergillus (43.8%) and Penicillium (31.3%). Among those detected, Byssochlamys, Curvularia, Phomopsis, Coprinellus, Perenniporia, Talaromyces, Pithomyces, Neopestalotiopsis, Trichoderma, Pleospora, and Humicola were found for the first time. Of the 40 strains tested, 8 strains showed great organic acid production, and the extent of mycelium covered from 33.6 to 46.24%. Specifically, the highest extracellular polymeric substance production was observed in Byssochlamys spectabilis BXMA1-2 (14.96 g/L), Aspergillus niger BXMA5-2 (12.17 g/L), and Aspergillus ochraceopetaliformis BMLC1-2 (9.89 g/L). Glass biodeterioration experiments revealed that the light transmission through the fungal-treated glasses was decreased by 30–42.2% as compared to the nontreated glass. In addition, the main alterations resulted from hyphal fingerprints and spots, leading to apparent damage and biocorrosion.

【 授权许可】

Unknown