Transcriptional effects of cadmium on iron homeostasis differ in calamine accessions of Noccaea caerulescens
- Halimaa, Pauliina
- Blande, Daniel
- Baltzi, Erol
- Aarts, Mark G.M.
- Granlund, Lars
- Keinänen, Markku
- Kärenlampi, Sirpa O.
- Kozhevnikova, Anna D.
- Peräniemi, Sirpa
- Schat, Henk
- Seregin, Ilya V.
- Tuomainen, Marjo
- Tervahauta, Arja I.
DOIAbstract
Calamine accessions of the zinc/cadmium/nickel hyperaccumulator, Noccaea caerulescens, exhibit striking variation in foliar cadmium accumulation in nature. The Ganges accession (GA) from Southern France displays foliar cadmium hyperaccumulation (>1000 μg g −1 DW), whereas the accession La Calamine (LC) from Belgium, with similar local soil metal composition, does not (<100 μg g −1 DW). All calamine accessions are cadmium hypertolerant. To find out the differences between LC and GA in their basic adaptation mechanisms, we bypassed the cadmium excluding phenotype of LC by exposing the plants to 50 μm cadmium in hydroponics, achieving equal cadmium accumulation in the shoots. The iron content increased in the roots of both accessions. GA exhib...
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