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Abstract Detail



Ecophysiology

Erdmann, James [1], Roehrs, Zachary [1], Wangeline, Ami [1].

Elemental analysis of vegetation in the selenium-rich Wind River Basin of Wyoming.

Selenium (Se) is a trace element nonessential to plants, but can become highly toxic in relatively low environmental concentrations. Despite Se toxicity in plants, certain groups are able uptake Se at levels significantly above those of the environment. These Se-accumulating plants, termed accumulators (100–1000 ppm dry weight) and hyperaccumulators (>1000 ppm dry weight) like Astragalus racemosus, dramatically increase bioavailable Se radially in the rhizosphere, leading to increasingly higher soil Se content. Apart from these specialized accumulators, plants from a variety of families are able to grow and thrive in close proximity to these Se-rich plants. In this study, we analyzed plants from a well-documented seleniferous environment (near Lysite, Wyoming, USA), with special focus on known Se hyperaccumulators and neighboring plants, for elements including Se. These analyses were performed with x-ray fluorescence (XRF) and inductively coupled plasma atomic emission spectroscopy (ICP-AES) to elucidate the elemental composition of these plants as well as evaluate these two techniques for quantitative comparison.

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1 - Laramie County Community College, Biology, 1400 E. College Drive, Cheyenne, WY, 82007, USA

Keywords:
Selenium
Wyoming
Astragalus
X-ray fluorescence
ICP-AES.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PEP011
Abstract ID:880
Candidate for Awards:Physiological Section Best poster presentation


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