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Influence of Deleterious Rhizobacteria on Leafy Spurge (Euphorbia esula) Roots

Published online by Cambridge University Press:  12 June 2017

Mark A. Brinkman
Affiliation:
Plant Science Department, South Dakota State University, Brookings, SD 57007
Sharon A. Clay*
Affiliation:
Plant Science Department, South Dakota State University, Brookings, SD 57007
Robert J. Kremer
Affiliation:
USDA-ARS Cropping Systems and Water Quality Unit, University of Missouri, Columbia, MO 65211
*
Corresponding author's E-mail: [email protected].

Abstract

Rhizobacteria have been shown to be phytotoxic to leafy spurge in laboratory assays. This field study investigated the influence of two strains of Pseudomonas fluorescens [Trevisan, (Migula)], deleterious rhizobacteria (DRB), on root weight, root bud number, and root carbohydrate content of leafy spurge at three sites located in northeast and north-central South Dakota. Soils were inoculated with 2 g of starch-based granules containing no bacteria or starch granules containing 108colony-forming units (cfu)/g of either bacterial strain LS102 (Montana origin) or LS174 (South Dakota origin). Bacterial strains were detected on root samples from treated areas. Root weight and root carbohydrate content were reduced about 20% compared to roots from control plots.

Type
Notes
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

South Dakota State University Experiment Station Paper 3121. Mention of trade names docs not constitute an endorsement by the USDA-ARS, South Dakota State University, or the University of Missouri over other products not mentioned.

Current address of senior author: Department of Entomology, University of Georgia Agricultural Experiment Station. Griffin, GA 30223.

References

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