NDLI: Brassicaceae cover crops reduce Aphanomyces pea root rot without suppressing genetic potential of microbial nitrogen cycling

Content Provider	Springer Nature Link
Author	Hossain, Shakhawat Bergkvist, Göran Glinwood, Robert Berglund, Kerstin Mårtensson, Anna Hallin, Sara Persson, Paula
Copyright Year	2015
Abstract	Brassicaceae cover crops can be used to suppress soil-borne pathogens. The aim was to investigate the effect of different brassicas with different glucosinolate profiles on the development of Aphanomyces pea root rot in subsequent pea plants, and the genetic potential of free-living N$_{2}$-fixing bacteria and ammonia oxidising bacteria (AOB) and archaea (AOA) performing key soil ecosystem services.The Brassicaceae species Brassica juncea and Sinapis alba and non-Brassicaceae species Secale cereale were grown for 11-weeks in Aphanomyces euteiches infested soil at low and high nitrogen (N) fertiliser doses. After removing both shoots and roots of the cover crops, peas were grown as a bioassay to evaluate Aphanomyces pea root rot development. Soil was sampled before harvesting the cover crops and at the end of the bioassay. Volatile compounds were collected in the root-soil environment before harvesting the Brassicaceae cover crops to determine the concentration of isothiocyanates. The abundance of genes involved in N$_{2}$-fixing bacteria and ammonia oxidation in AOA and AOB were assessed.Pea root rot disease severity was reduced in Brassicaceae grown soil at the high N fertiliser dose. This was associated with increased growth of the cover crops. The growth of Brassicaceae did not suppress the abundance of N-cycling microbial communities, but rather increased the AOB at the end of the bioassay, most likely due to increased N availability. The disease suppressive effect was higher with S. alba than with B. juncea, and this coincided with a more diverse composition and higher concentration of aliphatic ITCs released from S. alba roots. Fewer nodules were formed after the Brassicaceae crops, especially Sinapis alba.Brassicaceae cover crops, particularly S. alba, can be used to control soil-borne pathogens without major side effects on the genetic potential of beneficial soil microorganisms involved in N cycling. However, less nodule formation after brassicas indicates an effect on rhizobium activity.
Starting Page	227
Ending Page	238
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	392
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-04-02
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Glucosinolates Isothiocyanates Aphanomyces euteiches Brassica juncea Sinapis alba Nitrogen fertlisation Biofumigation Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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Brassicaceae cover crops reduce Aphanomyces pea root rot without suppressing genetic potential of microbial nitrogen cycling

Impact of Brassicaceae cover crops on pea root rot (Aphanomyces euteiches) in subsequent peas

Concentration- and time-dependent effects of isothiocyanates produced from Brassicaceae shoot tissues on the pea root rot pathogen Aphanomyces euteiches.

Biofumigation potential of Brassicaceae cultivars to Verticillium dahliae

Suppression of Verticillium dahliae by glucosinolate-containing seed meal amendments

Potential of Brassica cover crop and biofumigation to reduce Verticillium dahliae germination and Sunflower Verticillium Wilt

Evaluation of pea genotype PI180693 partial resistance towards aphanomyces root rot in commercial pea breeding

Inoculum dose–disease response relationships for the pea root rot pathogen, Aphanomyces euteiches, are dependent on soil type and other pathogens

Soil and crop cover: a potential resource of biocontrol agents against pea root rot caused by Aphanomyces euteiches

Brassicaceae cover crops reduce Aphanomyces pea root rot without suppressing genetic potential of microbial nitrogen cycling

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