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Abstract Detail

Recent Topics Posters

Blauvelt, Melissa [1].

Phytotoxicity and Rhizobium Establishment in Glycine max (L) Merr.

The potential influence of Tetracycline hydrochloride on plant growth and rhizobial symbiont establishment was observed over a span of 60 days by treating soybeans (Glycine max) with various concentrations of antibiotics.  Applications of Tetracycline were split into two 4-week phases: a germination phase and a seedling phase.  During each phase, plants were treated weekly with either a 30%, 50%, 65%, or 80% antibiotic solution (based on recovery rates). Bradyrhizobium japonicum, a species of symbiotic bacteria that is common in nature and helps fix atmospheric nitrogen, was also inoculated in half of the treatments and root nodule establishment was observed. Phytotoxicity and decreased rhizobial establishment was most apparent during the germination phase, affecting most critically plant height, the number and size of leaves, and leaf senescence. Rhizobial establishment was reduced in the treatments with lower concentrations of Tetracycline, and non-existent in the higher concentrations. Residual antibiotics in manure and soils may impact the health of agricultural crops, like soybeans, and these results suggest that timing is critical when determining when to apply fertilizers and maximize crop productivity. 

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1 - Flathead Valley Community College, 777 Grandview Drive, Kalispell, MT, 59901, USA


Presentation Type: Recent Topics Poster
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PRT045
Abstract ID:1831
Candidate for Awards:None

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