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Title: Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression

Abstract

Cropping soils vary in extent of natural suppression of soil-borne plant diseases. However, it is unknown whether similar variation occurs across pastoral agricultural systems. We examined soil microbial community properties known to be associated with disease suppression across 50 pastoral fields varying in management intensity. The composition and abundance of the disease-suppressive community were assessed from both taxonomic and functional perspectives. Pseudomonas bacteria were selected as a general taxonomic indicator of disease suppressive potential, while genes associated with the biosynthesis of a suite of secondary metabolites provided functional markers (GeoChip 5.0 microarray analysis). The composition of both the Pseudomonas communities and disease suppressive functional genes were responsive to land use. Underlying soil properties explained 37% of the variation in Pseudomonas community structure and up to 61% of the variation in the abundance of disease suppressive functional genes. Notably, measures of soil organic matter quality, C:P ratio, and aromaticity of the dissolved organic matter content (carbon recalcitrance), influenced both the taxonomic and functional disease suppressive potential of the pasture soils. Our results suggest that key components of the soil microbial community may be managed on-farm to enhance disease suppression and plant productivity.

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [4];  [5];  [6]
  1. Lincoln Univ., Christchurch (New Zealand); AgResearch Ltd, Christchurch (New Zealand)
  2. Lincoln Univ., Christchurch (New Zealand)
  3. Univ. of Utrecht (Netherlands)
  4. Univ. of Oklahoma, Norman, OK (United States)
  5. Univ. of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsinghua Univ., Beijing (China)
  6. Lincoln Univ., Christchurch (New Zealand); AgResearch Ltd, Christchurch (New Zealand); Scion Research Ltd, Christchurch (New Zealand)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1567102
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 13; Journal Issue: 5; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Dignam, Bryony E. A., O’Callaghan, Maureen, Condron, Leo M., Kowalchuk, George A., Van Nostrand, Joy D., Zhou, Jizhong, and Wakelin, Steven A. Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression. United States: N. p., 2018. Web. doi:10.1371/journal.pone.0196581.
Dignam, Bryony E. A., O’Callaghan, Maureen, Condron, Leo M., Kowalchuk, George A., Van Nostrand, Joy D., Zhou, Jizhong, & Wakelin, Steven A. Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression. United States. doi:10.1371/journal.pone.0196581.
Dignam, Bryony E. A., O’Callaghan, Maureen, Condron, Leo M., Kowalchuk, George A., Van Nostrand, Joy D., Zhou, Jizhong, and Wakelin, Steven A. Mon . "Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression". United States. doi:10.1371/journal.pone.0196581. https://www.osti.gov/servlets/purl/1567102.
@article{osti_1567102,
title = {Effect of land use and soil organic matter quality on the structure and function of microbial communities in pastoral soils: Implications for disease suppression},
author = {Dignam, Bryony E. A. and O’Callaghan, Maureen and Condron, Leo M. and Kowalchuk, George A. and Van Nostrand, Joy D. and Zhou, Jizhong and Wakelin, Steven A.},
abstractNote = {Cropping soils vary in extent of natural suppression of soil-borne plant diseases. However, it is unknown whether similar variation occurs across pastoral agricultural systems. We examined soil microbial community properties known to be associated with disease suppression across 50 pastoral fields varying in management intensity. The composition and abundance of the disease-suppressive community were assessed from both taxonomic and functional perspectives. Pseudomonas bacteria were selected as a general taxonomic indicator of disease suppressive potential, while genes associated with the biosynthesis of a suite of secondary metabolites provided functional markers (GeoChip 5.0 microarray analysis). The composition of both the Pseudomonas communities and disease suppressive functional genes were responsive to land use. Underlying soil properties explained 37% of the variation in Pseudomonas community structure and up to 61% of the variation in the abundance of disease suppressive functional genes. Notably, measures of soil organic matter quality, C:P ratio, and aromaticity of the dissolved organic matter content (carbon recalcitrance), influenced both the taxonomic and functional disease suppressive potential of the pasture soils. Our results suggest that key components of the soil microbial community may be managed on-farm to enhance disease suppression and plant productivity.},
doi = {10.1371/journal.pone.0196581},
journal = {PLoS ONE},
number = 5,
volume = 13,
place = {United States},
year = {2018},
month = {5}
}

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    Works referencing / citing this record:

    Applications of the Soil, Plant and Rumen Microbiomes in Pastoral Agriculture
    journal, July 2019

    • Attwood, Graeme T.; Wakelin, Steve A.; Leahy, Sinead C.
    • Frontiers in Nutrition, Vol. 6
    • DOI: 10.3389/fnut.2019.00107