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Microbial indicators related to yield and disease and changes in soil microbial community structure with ginger farm management practices

Rames, E. K. and Smith, M. K. and Hamill, S. D. and Faveri, J. (2013) Microbial indicators related to yield and disease and changes in soil microbial community structure with ginger farm management practices. Australasian Plant Pathology . pp. 1-8. ISSN 0815-3191

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Article Link(s): http://dx.doi.org/10.1007/s13313-013-0231-1

Abstract

TRFLP (terminal restriction fragment length polymorphism) was used to assess whether management practices that improved disease suppression and/or yield in a 4-year ginger field trial were related to changes in soil microbial community structure. Bacterial and fungal community profiles were defined by presence and abundance of terminal restriction fragments (TRFs), where each TRF represents one or more species. Results indicated inclusion of an organic amendment and minimum tillage increased the relative diversity of dominant fungal populations in a system dependant way. Inclusion of an organic amendment increased bacterial species richness in the pasture treatment. Redundancy analysis showed shifts in microbial community structure associated with different management practices and treatments grouped according to TRF abundance in relation to yield and disease incidence. ANOVA also indicated the abundance of certain TRFs was significantly affected by farming system management practices, and a number of these TRFs were also correlated with yield or disease suppression. Further analyses are required to determine whether identified TRFs can be used as general or soil-type specific bio-indicators of productivity (increased and decreased) and Pythium myriotylum suppressiveness.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:TRFLP Soil health Redundancy analysis Minimum tillage Bio-indicator
Subjects:Plant culture > Food crops
Plant culture > Horticulture. Horticultural crops
Deposited On:03 Sep 2013 05:31
Last Modified:03 Sep 2013 05:31

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