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Title of Journal: World J Microbiol Biotechnol

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Abbravation: World Journal of Microbiology and Biotechnology

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Springer Netherlands

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DOI

10.1002/jctb.5000574609

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1573-0972

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Characterizing cultivable soil microbial communiti

Authors: Carlo Viti Davide Quaranta Roberto De Philippis Giuseppe Corti Alberto Agnelli Rosanna Cuniglio Luciana Giovannetti
Publish Date: 2007/07/13
Volume: 24, Issue: 3, Pages: 309-318
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Abstract

Use of copperbased fungicides has led to an increase in the total Cu content in agriculture soils The focus of this study was to determine fractionation of Cu and to investigate the structure and the diversity of cultivable bacterial communities in two vineyards one 25 years old and one 2 years old one olive orchard and two forest soils All soils developed on an Oligocene sandstone The concentration of total Cu in the old vineyard 1766 mg kg−1 and olive orchard 1455–2967 mg kg−1 was from 5 to 10 times higher than in forest soils The major amount of Cu was found bound to the humic substances in cultivated soils whereas in forest soils Cu was found in the residual mineral fraction A relationship was found between the number of cultivable Cutolerant bacteria and total Cu content in soil In the cultivated soils Cu had a toxicological effect on bacterial community and thereby Culevels to 145 mg kg−1 could be a risk to soil biota Microbial communities were analysed by community level physiological profiling CLPP using the Biolog system and by the amplified ribosomal DNA restriction analysis ARDRA approach Only when cell suspensions containing 104 colonyforming units cfu were inoculated in each well of Biolog EcoPlates it was possible to discriminate microbial communities from different soil samples As expected 16S ARDRA showed that cultivated soils had a lower microbial diversity in respect to forest soils

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