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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/err344
|2 doi
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|a pubmed24n0710.xml
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|a (DE-627)NLM213106094
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|a (NLM)22090437
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Astolfi, S
|e verfasserin
|4 aut
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|a Response of barley plants to Fe deficiency and Cd contamination as affected by S starvation
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|c 2012
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 01.06.2012
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Both Fe deficiency and Cd exposure induce rapid changes in the S nutritional requirement of plants. The aim of this work was to characterize the strategies adopted by plants to cope with both Fe deficiency (release of phytosiderophores) and Cd contamination [production of glutathione (GSH) and phytochelatins] when grown under conditions of limited S supply. Experiments were performed in hydroponics, using barley plants grown under S sufficiency (1.2 mM sulphate) and S deficiency (0 mM sulphate), with or without Fe(III)-EDTA at 0.08 mM for 11 d and subsequently exposed to 0.05 mM Cd for 24 h or 72 h. In S-sufficient plants, Fe deficiency enhanced both root and shoot Cd concentrations and increased GSH and phytochelatin levels. In S-deficient plants, Fe starvation caused a slight increase in Cd concentration, but this change was accompanied neither by an increase in GSH nor by an accumulation of phytochelatins. Release of phytosiderophores, only detectable in Fe-deficient plants, was strongly decreased by S deficiency and further reduced after Cd treatment. In roots Cd exposure increased the expression of the high affinity sulphate transporter gene (HvST1) regardless of the S supply, and the expression of the Fe deficiency-responsive genes, HvYS1 and HvIDS2, irrespective of Fe supply. In conclusion, adequate S availability is necessary to cope with Fe deficiency and Cd toxicity in barley plants. Moreover, it appears that in Fe-deficient plants grown in the presence of Cd with limited S supply, sulphur may be preferentially employed in the pathway for biosynthesis of phytosiderophores, rather than for phytochelatin production
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cadmium
|2 NLM
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|a 00BH33GNGH
|2 NLM
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|a Sulfur
|2 NLM
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|a 70FD1KFU70
|2 NLM
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|a Phytochelatins
|2 NLM
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|a 98726-08-0
|2 NLM
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|a Iron
|2 NLM
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|a E1UOL152H7
|2 NLM
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|a Glutathione
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|a GAN16C9B8O
|2 NLM
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|a Zuchi, S
|e verfasserin
|4 aut
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|a Neumann, G
|e verfasserin
|4 aut
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|a Cesco, S
|e verfasserin
|4 aut
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|a Sanità di Toppi, L
|e verfasserin
|4 aut
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|a Pinton, R
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 63(2012), 3 vom: 01. Feb., Seite 1241-50
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:63
|g year:2012
|g number:3
|g day:01
|g month:02
|g pages:1241-50
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|u http://dx.doi.org/10.1093/jxb/err344
|3 Volltext
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