ABSTRACT The effect of mixed cropping on disease suppressiveness of soils was tested for two cropping systems, Brussels sprouts-barley and triticale-white clover. Disease suppressiveness of field soils was evaluated in bioassays for the soilborne pathogens Rhizoctonia solani, Fusarium oxysporum f. sp. lini, and Gaeumannomyces graminis var. tritici. For both cropping systems, mixed cropping did not enhance disease suppressiveness of the soils. In some cases, soil cropped to barley alone was significantly more suppressive to F. oxysporum f. sp. lini than soils cropped to Brussels sprouts or the mixture of Brussels sprouts and barley. Analyses of the diversity of the indigenous bacterial and fungal microflora by denaturing gradient gel electrophoresis of amplified 16S- and 18S-rDNA fragments, respectively, revealed, in most cases, no significant differences between mixed and mono-cropped soils. In conclusion, in this study, mixed cropping of soils with Brussels sprouts and barley or with triticale and white clover did not enhance microbial diversity or disease suppressiveness of soils to three different soilborne plant pathogens.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1094/PHYTO-95-1325 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spinach Seed Microbiome Characteristics Linked to Suppressiveness Against Globisporangium ultimum Damping-Off.
FEMS Microbiol Ecol
January 2025
Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands.
Recently we demonstrated that the seed microbiome of certain spinach (Spinacia oleracea) seed lots can confer disease suppression against Globisporangium ultimum damping-off (previously known as Pythium ultimum). We hypothesised that differences in the microbial community composition of spinach seed lots correlate with the levels of damping-off suppressiveness of each seed lot. Here, we show that a large proportion of variance in seed-associated bacterial (16S) and fungal (ITS1) amplicon sequences was explained by seed lot identity, while 9.
View Article and Find Full Text PDFDecomposition solutions from brassica and cereal residues suppress tomato bacterial wilt disease by regulating rhizosphere microbial communities.
Microbiol Res
December 2024
Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture, Harbin 150030, China; Department of Horticulture, Northeast Agricultural University, Harbin 150030, China. Electronic address:
Cover crops can suppress the following crop diseases and alter soil microbial communities, but the mechanisms of such disease suppressive effects remain uncertain. Here, we studied the effects of brassica and cereal cover crops, along with decomposition solutions from these crop residues, on tomato growth and bacterial wilt. Moreover, tomato rhizosphere microorganisms were analyzed by qPCR and high-throughput sequencing.
View Article and Find Full Text PDFEcological shifts in soil microbiota and root rot disease progress during ginseng monoculture.
Front Microbiol
October 2024
Division of Applied Life Science, RILS, Gyeongsang National University, Jinju, Republic of Korea.
Article Synopsis
- The study explores "suppressiveness," where ongoing cropping reduces plant disease impact, particularly focusing on ginseng monoculture and its microbial dynamics before disease occurs.
- Using long-term monoculture and advanced sequencing methods, researchers analyzed changes in soil microbiota, pathogen density, and disease rates, discovering that microbial communities decline before root rot disease manifests.
- They identified key microbes that influence soil health and disease resistance, highlighting the importance of maintaining microbial diversity for sustainable agriculture and effective disease management.
Delineating the soil physicochemical and microbiological factors conferring disease suppression in organic farms.
Microbiol Res
December 2024
The University of Queensland and Indian Institute of Technology Delhi Research Academy, New Delhi 110016, India; Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India. Electronic address:
Organic farming utilizes farmyard manure, compost, and organic wastes as sources of nutrients and organic matter. Soil under organic farming exhibits increased microbial diversity, and thus, becomes naturally suppressive to the development of soil-borne pathogens due to the latter's competition with resident microbial communities. Such soils that exhibit resistance to soil-borne phytopathogens are called disease-suppressive soils.
View Article and Find Full Text PDFNatural plant disease suppressiveness in soils extends to insect pest control.
Microbiome
July 2024
Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland.
Background: Since the 1980s, soils in a 22-km area near Lake Neuchâtel in Switzerland have been recognized for their innate ability to suppress the black root rot plant disease caused by the fungal pathogen Thielaviopsis basicola. However, the efficacy of natural disease suppressive soils against insect pests has not been studied.
Results: We demonstrate that natural soil suppressiveness also protects plants from the leaf-feeding pest insect Oulema melanopus.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!