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  Supply of sulphur to S-deficient young barley seedlings restores their capability to cope with iron shortage

Astolfi, S., Zuchi, S., Hubberten, H.-M., Pinton, R., & Hoefgen, R. (2010). Supply of sulphur to S-deficient young barley seedlings restores their capability to cope with iron shortage. Journal of Experimental Botany, 61(3), 799-806. doi:10.1093/Jxb/Erp346.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2471-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2472-F
Genre: Journal Article

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 Creators:
Astolfi, S.1, Author
Zuchi, S.1, Author
Hubberten, H.-M.2, Author              
Pinton, R.1, Author
Hoefgen, R.2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Amino Acid and Sulfur Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753337              

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Free keywords: atps oastl iron methionine phytosiderophores sulphur affinity sulfate transporter atp-sulfurylase different strategies higher-plants assimilation acquisition expression roots translocation deprivation
 Abstract: The effect of the S nutritional status on a plant's capability to cope with Fe shortage was studied in solution cultivation experiments in barley (Hordeum vulgare L. cv. Europa). Barley is a Strategy II plant and responds to Fe deficiency by secretion of chelating compounds, phytosiderophores (PS). All PS are derived from nicotianamine whose precursor is methionine. This suggests that a long-term supply of an inadequate amount of S could reduce a plant's capability to respond to Fe deficiency by limiting the rate of PS biosynthesis. The responses of barley (Hordeum vulgare L. cv. Europa) plants grown for 12 d on Fe-free nutrient solutions (NS) containing 0 or 1.2 mM SO42-, was examined after 24 h or 48 h from transfer to NS containing 1.2 mM SO42-. After the supply of S was restored to S-deprived plants, an increase in PS release in root exudates was evident after 24 h of growth in S-sufficient NS and the increment reached values up to 4-fold higher than the control 48 h after S resupply. When S was supplied to S-deficient plants, leaf ATPS (EC 2.7.7.4) and OASTL (EC 4.2.99.8) activities exhibited a progressive recovery. Furthermore, root HvST1 transcript abundance remained high for 48 h following S resupply and a significant increase in the level of root HvYS1 transcripts was also found after only 24 h of S resupply. Data support the idea that the extent to which the plant is able to cope with Fe starvation is strongly associated with its S nutritional status. In particular, our results are indicative that barley plants fully recover their capability to cope with Fe shortage after the supply of S is restored to S-deficient plants.

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Language(s): eng - English
 Dates: 2009-12-162010
 Publication Status: Published in print
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 Identifiers: ISI: ISI:000274345000017
DOI: 10.1093/Jxb/Erp346
ISSN: 0022-0957
URI: ://000274345000017 http://jxb.oxfordjournals.org/content/61/3/799.full.pdf
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Title: Journal of Experimental Botany
Source Genre: Journal
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Pages: - Volume / Issue: 61 (3) Sequence Number: - Start / End Page: 799 - 806 Identifier: -