Soil microbiostasis: Effects of environmental and edaphic factors

Microbiostasis by Nutrient Deficiency Shown in Natural and Synthetic Soils

“…Bacteriostasis, actinostasis and fungistasis exist concurrently in natural soils (Ho & KO, 1982; KO & Ho 1984). However, their antagonistic potential are differentially affected by environmental and edaphic factors (KO & Ho, 1984;Ho & KO, 1985). Lytic action on mycelia of most fungi is another unique antagonistic phenomenon of natural soil (Lockwood, 1960).…”

Streptomyces griseusEnhances Denitrification byRalstonia pickettiiK50, Which Is Possibly Mediated by Histidine Produced during Co-Culture

“…7) Since these strains produce low levels of N 2 O under aerobic conditions, they can be used to repress emission of N 2 O from wastewater treatment systems, but there are serious problems in the application of isolated microorganisms (bioaugmentation), e.g., poor survival rates and reduced activity in complex ecosystems. [8][9][10] One of the possible strategies to improve the efficiency of bioaugmentation is mixed culturing with other microbes. [11][12][13] After our preliminary screening of various microbes for co-culturing with strains TR2 and K50, we found that co-culturing with the actinomycete Streptomyces griseus greatly enhanced the denitrification activity of strain K50.…”

Starvation Improves Survival of Bacteria Introduced into Activated Sludge

“…Although bioaugmentation has proven useful in some cases, many reports have documented that inoculated microorganisms survived poorly and had only minor influences on the total ecosystem functions (13,16,36). Scientists have thus investigated factors governing their fate in various environments, and several important environmental factors, including physicochemical parameters (4,25), nutrient availability (5,8,36,40), grazing pressure (8,10), and the existence of microniches (21), have been elucidated.…”