Survival of two ecologically distinct bacteria (Flavobacterium and Arthrobacter) in unplanted and rhizosphere soil: Laboratory studies

Differences in dynamics between indigenous and inoculated Sphingomonas paucimobilis strain SS86 in soils

“…This fact suggests that when growing cells pre-cultured in the nutrient-rich culture medium were transferred to soil without 7-HCH amendment, most of them died because of a lack of adaptation to the oligotrophic soil environment. Similar results were obtained as with Flavobacterium inoculated into soil [16] and Escherichia coli to seawater [17]. Moreover, the decline rate shown by the inoculated starved cells was similar to that of tile inoculated SS86 to the HCH-amended control soil after reaching the maximum population level.…”

“…For instance, some parts of soil micro-organisms are known to undergo starvation-survival in the soil environment, their physiological properties such as shape, growth rate, cell components, and cell surface being rather different from those of growing cells [23][24][25]. Actually, starvation treatment was confirmed to enhance bacterial survival [16,17]. Cell size [26] and cell surface properties [27] were considered to affect protozoan predation and transportation with moving water through soil [28,29].…”

Metabolic Activity and Population Dynamics of Rhizobia Introduced into Unamended and Bentonite-Amended Loamy Sand

“…The total amounts of CO2 evolved from sterilized soil inoculated with rhizobia were in the same range but slightly lower, as found by Thompson et al (23), who performed similar experiments with Arthrobacter and Flavobacterium spp. inoculated into sterile soil.…”

Colonization of the developing rhizosphere of sugar beet seedlings by potential biocontrol agents applied as seed treatments

“…This has been variously attributed to; predation, competition and nutrient limitation (Thompson et al 1990); the variability of physical, chemical, microbiological and environmental factors (Kim and Misaghi 1996); and poor root surface colonization or an inability to be transported through the soil profile via the root (Chao et al 1986). …”