Open AccessBacterial diversity in the rhizosphere of maize and the surrounding carbonate‐rich bulk soil
Author(s) -
GarcíaSalamanca Adela,
MolinaHenares M. Antonia,
Dillewijn Pieter,
Solano Jennifer,
PizarroTobías Paloma,
Roca Amalia,
Duque Estrella,
Ramos Juan L.
Publication year - 2013
Publication title -
microbial biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.287
H-Index - 74
ISSN - 1751-7915
DOI - 10.1111/j.1751-7915.2012.00358.x
Subject(s) - rhizosphere , gammaproteobacteria , acidobacteria , bulk soil , biology , proteobacteria , bacteroidetes , actinobacteria , botany , phylum , soil microbiology , microbial population biology , agronomy , bacteria , soil water , ecology , genetics , 16s ribosomal rna
Summary Maize represents one of the main cultivar for food and energy and crop yields are influenced by soil physicochemical and climatic conditions. To study how maize plants influence soil microbes we have examined microbial communities that colonize maize plants grown in carbonate‐rich soil ( pH 8.5) using culture‐independent, PCR ‐based methods. We observed a low proportion of unclassified bacteria in this soil whether it was planted or unplanted. Our results indicate that a higher complexity of the bacterial community is present in bulk soil with microbes from nine phyla, while in the rhizosphere microbes from only six phyla were found. The predominant microbes in bulk soil were bacteria of the phyla A cidobacteria , B acteroidetes and P roteobacteria , while G ammaproteobacteria of the genera P seudomonas and L ysobacter were the predominant in the rhizosphere. As G ammaproteobacteria respond chemotactically to exudates and are efficient in the utilization of plants exudate products, microbial communities associated to the rhizosphere seem to be plant‐driven. It should be noted that G ammaproteobacteria made available inorganic nutrients to the plants favouring plant growth and then the benefit of the interaction is common.