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Photovoltaic panels are installed outdoors, and therefore are exposed to various weather conditions, such as winds, extreme heat and cold, rain and drought. The use of clean energy sources has increased significantly in the last decades, and at same way, the understanding of the advantages and limitations of each system has also advanced. Recent studies (SHIRAKAWA et al. 2015, MOURA et al., 2021) demonstrated considerable energy efficiency loss of panels due to the biofilm formation. Biofilm is a complex assemblage of microbial cells associated by an extracellular polymeric substance (EPS) matrix, enabling a pleasant environment that allows the survival of several species. Thus, a greater understanding of its processes should lead to novel and effective control strategies for biofilm control. Beside, extreme environments, such as photovoltaic panels are of great interest from a biotechnological perspective. The identification of the species of microorganisms comprising the biofilm and the elucidation of the defense mechanisms will certainly open up new perspectives for the industrial sector (TANNER et al., 2019). Considering the relevance of this knowledge area and the limited number of studies available, the aim of this study was the identification and characterization of the microbial community from a photovoltaic panel located in Belo Horizonte (MG). The samples were collected in different sectors of the photovoltaic panel surface (KC60 Kyocera, 751 mm X 652 mm), and were sequenced through the Illumina HiSeq 2500 using shotgun metagenomics. Low quality sequences (Phred score ≤ 20) were trimmed using Trimmomatic v.0.39. After the assembling of the contigs, the data were BLAST against SILVA database, considering the regions of interest (16S e 18S). About 30 prokaryotic genera were identify, being Caloramator the prevalent (around 30%) in all the samples. Caloramator is known for its wide metabolic capacity at high temperatures and has attracted interest in the field of biotechnology. Other genera identified in the samples were Rhodococcus, Arthrobacter, Mycoplasma, Pseudomonas and Streptosporangium, which are known for their extremophilic characteristics or/and biofilm formation. Regarding the eukaryotic community, about 25 genera of fungi were identify, in addition to representatives of the viridiplantae and metazoa kingdoms. Some of the fungi genera identified were Peziza, Cheilymenia and Varicosporina. Our preliminary results confirmed the high microbial diversity of the photovoltaic panels, as well as its potentiality as a source of microorganisms of biotechnological interest. In addition to the taxonomic analyses it’s necessary the use of functional profile analyses for better understanding of biofilm formation mechanism.

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#	Name
1	Viviane Jotta(vivianejottacefet@hotmail.com)
2	Carla Silva(carlaalessandrasilva8@gmail.com)
3	Aristóteles Góes-Neto(arigoesneto@gmail.com)
4	Flávia Abujarle(faburjaile@gmail.com)
5	Ângela Ferreira (angelamelo44@gmail.com,)
6	Fernanda Badotti(fbadotti@outlook.com)

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1	Tanner, K., Mortorell, P., Genovés, S., Ramón, D., Zacarias, L., Rodrigo, M. J., Peretó, J. and Porcar, M. (2019). Bioprospecting the Solar Panel Microbiome: High-Throughput Screening for Antioxidant Bacteria in a Caenorhabditis elegans Model. Frontiers in Microbiology. https://www.frontiersin.org/articles/10.3389/fmicb.2019.00986/full. November. Shirakawa, M. A., Zilles, R., Mocelin, A., Gaylard, C. C., Gorbushina, A., Heidrich, G., Giudice, M. C., Del Negro, G. M. B. and John, V. M. (2015). Microbial colonization affects the efficiency of photovoltaic panels in a tropical environment. Journal of Environmental Manegement. https://www.sciencedirect.com/science/article/pii/S0301479715001875?casa_token=DZ3 K1O4Lu7sAAAAA:kpsweznoVU6NkFh-dQPGlDX-ZaMymqLPniPP9GsPUW2LcC- yBo9e72kUPhAFf0vHX1aWk9hKyolz0w. December. Hatmaker, E. A., Klingeman, D. M., Martin, R. K., Guss, A. M.; Elikins, J. G. (2019). Complete Genome Sequence of Caloramator sp. Strain E03, a Novel Ethanologenic, Thermophilic, Obligately Anaerobic Bacterium. Microbiology Resource Announcements. https://journals.asm.org/doi/full/10.1128/MRA.00708-19. November. Barseghyan, G. S., Solomon, P. (2011). The genus Peziza Dill. ex Fr.(Pezizales, Ascomycota) in Israel. Ascomycete.org. https://www.researchgate.net/profile/Gayane-Barseghyan- 2/publication/230559797_The_genus_Peziza_Dill_ex_Fr_Pezizales_Ascomycota_in_Isra el/links/0912f5017978bb9496000000/The-genus-Peziza-Dill-ex-Fr-Pezizales- Ascomycota-in-Israel.pdf. July. Moura, J. B., Delforno, T. P., Do Prado, P. F., Duarte, I. C. (2021) Extremophilic taxa predominate in a microbial community of photovoltaic panels in a tropical region. FEMS Microbiology Letters. https://academic.oup.com/femsle/article/368/16/fnab105/6350555. November.

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