We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Root exudation of phytosiderophores from soil-grown wheat.
- Authors
Oburger, Eva; Gruber, Barbara; Schindlegger, Yvonne; Schenkeveld, Walter D. C.; Hann, Stephan; Kraemer, Stephan M.; Wenzel, Walter W.; Puschenreiter, Markus
- Abstract
• For the first time, phytosiderophore (PS) release of wheat (Triticum aestivum cv Tamaro) grown on a calcareous soil was repeatedly and nondestructively sampled using rhizoboxes combined with a recently developed root exudate collecting tool. As in nutrient solution culture, we observed a distinct diurnal release rhythm; however, the measured PS efflux was c. 50 times lower than PS exudation from the same cultivar grown in zero iron (Fe)-hydroponic culture. • Phytosiderophore rhizosphere soil solution concentrations and PS release of the Tamaro cultivar were soil-dependent, suggesting complex interactions of soil characteristics (salinity, trace metal availability) and the physiological status of the plant and the related regulation (amount and timing) of PS release. • Our results demonstrate that carbon and energy investment into Fe acquisition under natural growth conditions is significantly smaller than previously derived from zero Fe-hydroponic studies. Based on experimental data, we calculated that during the investigated period (21-47 d after germination), PS release initially exceeded Fe plant uptake 10-fold, but significantly declined after c. 5 wk after germination. • Phytosiderophore exudation observed under natural growth conditions is a prerequisite for a more accurate and realistic assessment of Fe mobilization processes in the rhizosphere using both experimental and modeling approaches.
- Subjects
PHYTOSIDEROPHORES; PLANT roots; WHEAT varieties; RHIZOSPHERE; PLANT growth
- Publication
New Phytologist, 2014, Vol 203, Issue 4, p1161
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.12868