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Soil factors involved in the diversity and structure of soil bacterial communities in commercial organic olive orchards in S outhern S pain
Author(s) -
Landa B. B.,
MontesBorrego M.,
Aranda S.,
Soriano M. A.,
Gómez J. A.,
NavasCortés J. A.
Publication year - 2014
Publication title -
environmental microbiology reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.229
H-Index - 69
ISSN - 1758-2229
DOI - 10.1111/1758-2229.12148
Subject(s) - terminal restriction fragment length polymorphism , soil type , soil quality , environmental science , soil water , orchard , tillage , agronomy , biology , restriction fragment length polymorphism , soil science , polymerase chain reaction , biochemistry , gene
Summary Nowadays, there is a tendency in olive production systems to reduce tillage or keep a vegetative cover to reduce soil erosion and degradation. However, there is scarce information on the effects of different soil management systems ( SMS ) in soil bacterial community composition of olive groves. In this study, we have evaluated the effects of soil type and different SMS implemented to control weeds in the structure and diversity of bacterial communities of 58 soils in the two geographic areas that best represent the organic olive production systems in S pain. Bacterial community composition assessed by frequency and intensity of occurrence of terminal restriction profiles ( TRFs ) derived from terminal restriction fragment length polymorphism ( T ‐ RFLP ) analysis of amplified 16S ribosomal deoxyribonucleic acid were strongly correlated with soil type/field site (Eutric/Calcaric) that differed mainly in soil particle size distribution and soil pH , followed by a strong effect of SMS , in that order. Canonical discriminant ( CD ) analysis of TRFs properly classified all of the olive orchard soils as belonging to their respective soil type or SMS . Furthermore, only a small set of TRFs were enough to clearly and significantly differentiate soil samples according to soil type or SMS . Those specific TRFs could be used as bioindicators to assess the effect of changes in SMS aimed to enhance soil quality in olive production systems.