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Biodiversity of Mineral Nutrient and Trace Element Accumulation in Arabidopsis thaliana

Permanent URL:
http://handle.nal.usda.gov/10113/54149
File:
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Abstract:
In order to grow on soils that vary widely in chemical composition, plants have evolved mechanisms for regulating the elemental composition of their tissues to balance the mineral nutrient and trace element bioavailability in the soil with the requirements of the plant for growth and development. The biodiversity that exists within a species can be utilized to investigate how regulatory mechanisms of individual elements interact and to identify genes important for these processes. We analyzed the elemental composition (ionome) of a set of 96 wild accessions of the genetic model plant Arabidopsis thaliana grown in hydroponic culture and soil using inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of 17–19 elements were analyzed in roots and leaves from plants grown hydroponically, and leaves and seeds from plants grown in artificial soil. Significant genetic effects were detected for almost every element analyzed. We observed very few correlations between the elemental composition of the leaves and either the roots or seeds. There were many pairs of elements that were significantly correlated with each other within a tissue, but almost none of these pairs were consistently correlated across tissues and growth conditions, a phenomenon observed in several previous studies. These results suggest that the ionome of a plant tissue is variable, yet tightly controlled by genes and gene×environment interactions. The dataset provides a valuable resource for mapping studies to identify genes regulating elemental accumulation.
Author(s):
Baxter, Ivan , Hermans, Christian , Lahner, Brett , Yakubova, Elena , Tikhonova, Marina , Verbruggen, Nathalie , Chao, Dai-yin , Salt, David E.
Subject(s):
Arabidopsis thaliana , bioaccumulation , bioavailability , biodiversity , chemical composition , chemical concentration , gene interaction , genes , genotype-environment interaction , hydroponics , leaves , mass spectrometry , minerals , nutrient balance , plant development , plant genetics , plant tissues , planting seed , roots , seeds , soil , trace elements
Note:
Includes references
Source:
PLoS one 2012 Apr., v. 7, no. 4
Language:
English
Year:
2012
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.