Search of environmental descriptors to explain the variability of the bacterial diversity from maize rhizospheres across a regional scale

Dynamics of the bacterial community structure in the rhizosphere of a maize cultivar

“…Another study conducted in the carbonate-rich soil (pH 8.5) using 16S rRNA clone library analysis showed that Pseudomonas and Lysobacter genera constituted 45% of the total bacterial abundance in the maize rhizosphere (García-Salamanca et al, 2013). Though exact mechanisms for such differences are not completely understood, because these studies were all conducted on different soil types, it is likely that soil type may be one of the most important environmental variables influencing the structure of the maize root-inhabiting bacterial community at low taxonomic levels (Berg and Smalla, 2009;Castellanos et al, 2009;Garbeva et al, 2004). Growth-stage related dynamics and the differences in rhizosphere bacterial community structure from different soil types further support the general concept that plant and soil type cooperatively shape the structure of microbial community in the rhizosphere (Berg and Smalla, 2009).…”

“…Soil is para brown earth, silty sand (sand 81.8%, silt 8.7%, clay 7.6%, pH 6.4, organic matter 1.67%) (Castellanos et al, 2009). They measured the bacterial community composition in the samples from different cultivars and root microhabitats (fine or coarse roots).…”

“…As maize (Zea mays) is an important crop, its rhizosphere bacterial community has been intensively investigated using a variety of approaches (Aira et al, 2010;Castellanos et al, 2009;Chelius and Triplett, 2001;Dohrmann et al, 2013). Previous studies suggested that maize selects for a specific bacterial community depending on soil properties (Castellanos et al, 2009), genotypes (Aira et al, 2010), crop management, such as fertilizer (Aira et al, 2010) and growth stages (Cavaglieri et al, 2009;Di Cello et al, 1997).…”

“…As maize (Zea mays) is an important crop, its rhizosphere bacterial community has been intensively investigated using a variety of approaches (Aira et al, 2010;Castellanos et al, 2009;Chelius and Triplett, 2001;Dohrmann et al, 2013). Previous studies suggested that maize selects for a specific bacterial community depending on soil properties (Castellanos et al, 2009), genotypes (Aira et al, 2010), crop management, such as fertilizer (Aira et al, 2010) and growth stages (Cavaglieri et al, 2009;Di Cello et al, 1997). Some studies have suggested that microbial community composition in the maize rhizosphere is independent of cultivar (Dohrmann et al, 2013;Schmalenberger and Tebbe, 2002), growth stage (Gomes et al, 2001) and genotype (Schmalenberger and Tebbe, 2002).…”

Bacterial populations in juvenile maize rhizospheres originate from both seed and soil

“…The advent of sensitive molecular fingerprinting and affordable next generation sequencing technologies has sparked a renaissance in rhizosphere research, with many new studies concerning the bacterial diversity present in maize rhizospheres (Bakker et al 2015;Bouffaud et al 2012;Castellanos et al 2009;Dalmastri et al 1999;Peiffer and Ley 2013;Peiffer et al 2013), Arabidopsis rhizospheres (Bulgarelli et al 2012;Lundberg et al 2012;Micallef et al 2009) and the rhizospheres of other important plant species (Costa et al 2006;Edwards et al 2015;Garbeva et al 2008;Germida and Siciliano 2001;Inceoglu et al 2010;van Overbeek and van Elsas 2008;Weinert et al 2011).…”