Terriglobus tenax sp. nov., an exopolysaccharide-producing acidobacterium isolated from rhizosphere soil of a medicinal plant

Abstract

An exopolysaccharide-producing bacterium, designated strain DRP 35 T , was isolated from the rhizosphere soil of a medicinal herb, Angelica sinensis, at Geumsan in Korea. Cells were Gramstaining-negative, non-motile, catalase-positive and oxidase-negative short rods. The isolate grew aerobically from 15 to 45 6C (optimum 30 6C), pH 3.5-7.0 (optimum pH 5.0) and in the presence of 0-1.0 % (w/v) NaCl. The phylum Acidobacteria constitutes one of the most abundant (~20 % of the total bacterial community) and broadly distributed groups of bacteria in soil ecosystems but is relatively difficult to cultivate and poorly represented in culture (Janssen, 2006). To date, 12 genera of this phylum have been described: Acidobacterium (Kishimoto et al

Acidobacteria strains from subdivision 1 act as plant growth-promoting bacteria

“…2). Acidobacteria strains Granulicella paludicola , G. pectinivorans , G. aggregans and G. rosea (Pankratov and Dedysh 2010), Acidicapsa borealis and A. ligni (Kulichevskaya et al 2012) and Terriglobus tenax (Whang et al 2014) were proven to produce extracellular polysaccharide. By genome mining, Ward et al (2009) have suggested Acidobacteria being involved in soil matrix formation, water and nutrition trapping, or bacterial adhesion that lead to soil aggregate formation.…”

Plant growth‐promoting rhizobacterial communities from an area under the influence of iron mining and from the adjacent phytophysiognomies which have high genetic diversity

“…In the Proteobacteria phylum, the genera Bradyrhizobium, Paraburkholderia, Mesorhizobium, Methylobacterium, and Rhizobium were already recognized as mutualistic symbionts of siratro (Angus et al, 2013;Ardley et al, 2014;Borges et al, 2016;Lima et al, 2009). (Armanhi et al, 2018;Cao et al, 2015;Castro et al, 2017;Chou et al, 2007;De Meyer et al, 2015;Hoque et al, 2011;Li et al, 2011;Lu et al, 2017;Sun et al, 2017;Thijs et al, 2014;Whang et al, 2014;Xiao et al, 2017). The other genera isolated have been registered in the literature as endophytic bacteria and plant growth promotors (Chen et al, 2001;Costa et al, 2016;Flores-Félix et al, 2014;Guglielmetti et al, 2013;Guimarães et al, 2012;Jaramillo et al, 2013;Mendis et al, 2018;Souza et al, 2015;Wang et al, 2017;Zhang et al, 2016;Zhao et al, 2017).…”

Characterization of novel Acidobacteria exopolysaccharides with potential industrial and ecological applications

“…These reports include genome mining studies11, description of cultured Acidobacteria species1213 and their interactions with plants14. However, EPS was never isolated and characterized in these studies.…”