Population dynamics of the fast-growing sub-populations of Pseudomonas and total bacteria, and their protozoan grazers, revealed by fenpropimorph treatment

L Thirup; Flemming Ekelund; Kaare Eske Johnsen; Carsten Suhr Jacobsen

doi:10.1016/S0038-0717(00)00075-4

Population dynamics of the fast-growing sub-populations of Pseudomonas and total bacteria, and their protozoan grazers, revealed by fenpropimorph treatment

L Thirup, Flemming Ekelund, Kaare Eske Johnsen, Carsten Suhr Jacobsen

Terrestrial Ecology

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

30 Citationer (Scopus)

Abstract

Udgivelsesdato: 1 October 2000

Originalsprog	Engelsk
Tidsskrift	Soil Biology & Biochemistry
Vol/bind	32
Udgave nummer	11-12
Sider (fra-til)	1615-1623
ISSN	0038-0717
DOI	https://doi.org/10.1016/S0038-0717(00)00075-4
Status	Udgivet - 2000

Bibliografisk note

Author Keywords: Predation; Fenpropimorph; Pseudomonas; Protozoa; Bacteria; Soil; Micro CFU

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Citationsformater

Population dynamics of the fast-growing sub-populations of Pseudomonas and total bacteria, and their protozoan grazers, revealed by fenpropimorph treatment. / Thirup, L; Ekelund, Flemming; Johnsen, Kaare Eske et al.
I: Soil Biology & Biochemistry, Bind 32, Nr. 11-12, 2000, s. 1615-1623.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

@article{cfbaf6b0b58411ddb04f000ea68e967b,

title = "Population dynamics of the fast-growing sub-populations of Pseudomonas and total bacteria, and their protozoan grazers, revealed by fenpropimorph treatment",

abstract = "The population dynamics of indigenous soil bacteria and protozoa on decaying barley roots were followed by using litter bags buried in laboratory-incubated soil. The soil was either non-treated or treated with the fungicide fenpropimorph (in the formulation Corbel) at concentrations corresponding to the recommended and at 10 times field dose (1.3 and 13 mg kg-1 dry wt.). Number of total bacteria and number of Pseudomonas were detected, using both traditional plating and short-time incubations of {\textquoteleft}early' colonies, to determine the fast-responding subpopulation of the culturable bacteria. The number of protozoa corresponding to the two subpopulations was followed. The results strongly indicate a predatory association between the protozoa and bacteria. This was shown by a tight temporal association, and by a stimulation of bacteria following predatory release when protozoa were inhibited by fenpropimorph. Thus, fenpropimorph disturbed population dynamics in concentrations, which can be reached in surface soils after distribution in the field.",

author = "L Thirup and Flemming Ekelund and Johnsen, {Kaare Eske} and Jacobsen, {Carsten Suhr}",

note = "Author Keywords: Predation; Fenpropimorph; Pseudomonas; Protozoa; Bacteria; Soil; Micro CFU",

year = "2000",

doi = "10.1016/S0038-0717(00)00075-4",

language = "English",

volume = "32",

pages = "1615--1623",

journal = "Soil Biology & Biochemistry",

issn = "0038-0717",

publisher = "Pergamon Press",

number = "11-12",

}

TY - JOUR

T1 - Population dynamics of the fast-growing sub-populations of Pseudomonas and total bacteria, and their protozoan grazers, revealed by fenpropimorph treatment

AU - Thirup, L

AU - Ekelund, Flemming

AU - Johnsen, Kaare Eske

AU - Jacobsen, Carsten Suhr

N1 - Author Keywords: Predation; Fenpropimorph; Pseudomonas; Protozoa; Bacteria; Soil; Micro CFU

PY - 2000

Y1 - 2000

N2 - The population dynamics of indigenous soil bacteria and protozoa on decaying barley roots were followed by using litter bags buried in laboratory-incubated soil. The soil was either non-treated or treated with the fungicide fenpropimorph (in the formulation Corbel) at concentrations corresponding to the recommended and at 10 times field dose (1.3 and 13 mg kg-1 dry wt.). Number of total bacteria and number of Pseudomonas were detected, using both traditional plating and short-time incubations of ‘early' colonies, to determine the fast-responding subpopulation of the culturable bacteria. The number of protozoa corresponding to the two subpopulations was followed. The results strongly indicate a predatory association between the protozoa and bacteria. This was shown by a tight temporal association, and by a stimulation of bacteria following predatory release when protozoa were inhibited by fenpropimorph. Thus, fenpropimorph disturbed population dynamics in concentrations, which can be reached in surface soils after distribution in the field.

AB - The population dynamics of indigenous soil bacteria and protozoa on decaying barley roots were followed by using litter bags buried in laboratory-incubated soil. The soil was either non-treated or treated with the fungicide fenpropimorph (in the formulation Corbel) at concentrations corresponding to the recommended and at 10 times field dose (1.3 and 13 mg kg-1 dry wt.). Number of total bacteria and number of Pseudomonas were detected, using both traditional plating and short-time incubations of ‘early' colonies, to determine the fast-responding subpopulation of the culturable bacteria. The number of protozoa corresponding to the two subpopulations was followed. The results strongly indicate a predatory association between the protozoa and bacteria. This was shown by a tight temporal association, and by a stimulation of bacteria following predatory release when protozoa were inhibited by fenpropimorph. Thus, fenpropimorph disturbed population dynamics in concentrations, which can be reached in surface soils after distribution in the field.

U2 - 10.1016/S0038-0717(00)00075-4

DO - 10.1016/S0038-0717(00)00075-4

M3 - Journal article

SN - 0038-0717

VL - 32

SP - 1615

EP - 1623

JO - Soil Biology & Biochemistry

JF - Soil Biology & Biochemistry

IS - 11-12

ER -