| Characterization of rhizosphere fungi from selenium hyperaccumulator and nonhyperaccumulator plants along the eastern Rocky Mountain Front Range. | |
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MedLine Citation:
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PMID: 21730338 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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• Premise of study: Selenium-hyperaccumulator plants can store over 1% (dry mass) Se in their tissues, despite the toxicity of this element at high concentrations across eukaryotes. These levels of Se can have widespread effects on the plant's ecological partners, including herbivores and pathogens. Still other partners seem to have coevolved Se tolerance. This is the first known study addressing the rhizosphere mycoflora of Se hyperaccumulators and aims to evaluate the rhizospheric fungal diversity and Se tolerance to further the knowledge of how these organisms interact with their host plants and survive in these extreme habitats. • Methods: Rhizosphere fungi were isolated from Se-hyperaccumulator and nonaccumulator plant species collected from five sites in Colorado and Wyoming; four seleniferous sites and one nonseleniferous site. 259 isolates were identified to genus or species and evaluated for Se tolerance. • Key results: Among the 24 represented genera, 11 comprised 86% of the isolates. The majority of isolates from the seleniferous sites were unaffected by 10 mg·L(-1) Se, irrespective of host plant (hyperaccumulator vs. nonaccumulator), while rhizosphere fungi from a control, nonseleniferous site were highly sensitive to Se at 10 mg·L(-1) and as a group were significantly less (α = 0.05) tolerant than the isolates from the seleniferous sites. • Conclusions: Even though Se is a commonly used antifungal agent, these results suggest that rhizosphere fungi from seleniferous habitats have widespread Se tolerance, likely an adaptive advantage in their Se-rich habitat. |
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Authors:
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Ami L Wangeline; J Rodolfo Valdez; Stormy Dawn Lindblom; Keri L Bowling; F Brent Reeves; Elizabeth A H Pilon-Smits |
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Publication Detail:
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Type: Journal Article Date: 2011-06-10 |
Journal Detail:
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Title: American journal of botany Volume: 98 ISSN: 1537-2197 ISO Abbreviation: Am. J. Bot. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-07-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370467 Medline TA: Am J Bot Country: United States |
Other Details:
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Languages: eng Pagination: 1139-47 Citation Subset: IM |
Affiliation:
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Department of Biology, Colorado State University, Fort Collins, Colorado 80523 USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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