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A comparison of sulfate and selenium accumulation in relation to the expression of sulfate transporter genes in Astragalus species.
- Source :
-
Plant physiology [Plant Physiol] 2011 Dec; Vol. 157 (4), pp. 2227-39. Date of Electronic Publication: 2011 Oct 04. - Publication Year :
- 2011
-
Abstract
- Sulfate and selenate uptake were investigated in both selenium (Se) hyperaccumulators (Astragalus racemosus and Astragalus bisulcatus) and closely related nonaccumulator species (Astragalus glycyphyllos and Astragalus drummondii). Sulfur (S) starvation increased Se accumulation, whereas increased selenate supply increased sulfate accumulation in both root and shoot tissues. cDNAs for homologs of groups 1 to 4 sulfate transporters were cloned from these Astragalus species to investigate patterns of expression and interactions with sulfate and selenate uptake. In contrast to all other previously analyzed plant species, abundant gene expression of putative sulfate transporters was observed for both Se-hyperaccumulating and nonaccumulating Astragalus, regardless of S and Se status. Furthermore, quantitative analysis of expression indicated a transcript level in Se-hyperaccumulating Astragalus comparable with other plant species under S deprivation. The high expression of sulfate transporters in certain Astragalus species may lead to enhanced Se uptake and translocation ability and therefore may contribute to the Se hyperaccumulation trait; however, it is not sufficient to explain S/Se discriminatory mechanisms.
- Subjects :
- Amino Acid Motifs
Amino Acid Sequence
Anion Transport Proteins genetics
Astragalus Plant genetics
Base Sequence
Biological Transport
DNA, Complementary genetics
DNA, Plant chemistry
DNA, Plant genetics
Gene Expression Regulation, Plant
Molecular Sequence Data
Phenotype
Plant Proteins genetics
Plant Proteins metabolism
Plant Roots genetics
Plant Roots metabolism
Plant Shoots genetics
Plant Shoots metabolism
Plants, Genetically Modified
RNA genetics
RNA, Plant genetics
Selenic Acid analysis
Sequence Alignment
Sulfates analysis
Anion Transport Proteins metabolism
Astragalus Plant metabolism
Selenic Acid metabolism
Selenium metabolism
Sulfates metabolism
Sulfur metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1532-2548
- Volume :
- 157
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Plant physiology
- Publication Type :
- Academic Journal
- Accession number :
- 21972267
- Full Text :
- https://doi.org/10.1104/pp.111.183897