caa a22 4500 475783670 CHVBK 20180406123652.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1008135501265 doi (NATIONALLICENCE)springer-10.1023/A:1008135501265 Biodeterioration of ornamental marble statues in the Boboli Gardens (Florence, Italy) [Elektronische Daten] [Gioia Lamenti, Piero Tiano, Luisa Tomaselli] The colonisation of ornamental marble statues in theBoboli Gardens of Florence (Italy) by photosyntheticmicro-organisms was investigated. The greenmicroalga Coccomyxa was the first colonizer ofnewly restored marble surfaces, appearing one yearafter the periodic cleaning and restoration of thestatues. Two years after restoration this alga gaverise to very thin green biofilms, with densitiesreaching about 3 × 102 cells cm-2. Later,the biofilms were enriched by cyanobacterial forms,which became dominant. In about six years, aphotosynthetic microbial community, amounting to about3 × 104 cells cm-2, and structurally similarto that occurring on the unrestored statues wasdeveloped. This epilithic community showed amarked biodiversity; the main representative formsincluded Chroococcidiopsis, Leptolyngbya,Pleurocapsa, Coccomyxa and Apatococcus.Coccomyxa initiated the colonisation of themarble surfaces, favoured in this process by itsfacultative oligotrophic capacity and high cellsurface hydrophobicity, combined with tolerance ofhigh light intensity. The other investigated isolatedstrains did not show this set of features. Thesecretion of polysaccharidic substances and cellsurface hydrophobicity enhancing the capacity toadhere, favoured permanent colonisation of thecyanobacterial population. Indeed, the majority of thecyanobacterial strains (90%), were shown to besurrounded by exopolysaccharidic envelops, whichcontributed to the formation of stable microbialbiofilms, and possessed variable cell surfacehydrophobicity. Kluwer Academic Publishers, 2000 adhesion features nationallicence biodeterioration nationallicence colonisation dynamics nationallicence photosynthetic micro-organisms nationallicence stone monuments nationallicence Lamenti Gioia CNR-Centro di Studio dei Microrganismi Autotrofi, P.le delle Cascine, 27, I-50144, Firenze, Italy aut Tiano Piero CNR- Centro di Studio sulle Cause di Deperimento e Metodi di Conservazione delle Opere d'Arte, Via G. Capponi, 9, I-50121, Firenze, Italy aut Tomaselli Luisa CNR-Centro di Studio dei Microrganismi Autotrofi, P.le delle Cascine, 27, I-50144, Firenze, Italy aut Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 427-433 0921-8971 12:3-5<427 2000 12 10811 https://doi.org/10.1023/A:1008135501265 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008135501265 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lamenti Gioia CNR-Centro di Studio dei Microrganismi Autotrofi, P.le delle Cascine, 27, I-50144, Firenze, Italy aut NATIONALLICENCE 700 1- Tiano Piero CNR- Centro di Studio sulle Cause di Deperimento e Metodi di Conservazione delle Opere d'Arte, Via G. Capponi, 9, I-50121, Firenze, Italy aut NATIONALLICENCE 700 1- Tomaselli Luisa CNR-Centro di Studio dei Microrganismi Autotrofi, P.le delle Cascine, 27, I-50144, Firenze, Italy aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 427-433 0921-8971 12:3-5<427 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer