Imperial College London
Alternate

ProfessorDominikWeiss

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Environmental Geochemistry
 
 
 
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Contact

 

+44 (0)20 7594 6383d.weiss

 
 
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Location

 

2.39Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Affholder:2017:10.1111/pce.13069,
author = {Affholder, M-C and Weiss, DJ and Wissuwa, M and Johnson-Beebout, SE and Kirk, GJD},
doi = {10.1111/pce.13069},
journal = {Plant, Cell and Environment},
pages = {3018--3030},
title = {Soil CO2 venting as one of the mechanisms for tolerance of Zn deficiency by rice in flooded soils.},
url = {http://dx.doi.org/10.1111/pce.13069},
volume = {40},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We sought to explain rice (Oryza sativa) genotype differences in tolerance of zinc (Zn) deficiency in flooded paddy soils and the counter-intuitive observation, made in earlier field experiments, that Zn uptake per plant increases with increasing planting density. We grew tolerant and intolerant genotypes in a Zn-deficient flooded soil at high and low planting densities, and found (a) plant Zn concentrations and growth increased with planting density and more so in the tolerant genotype, whereas the concentrations of other nutrients decreased, indicating a specific effect on Zn uptake; (b) the effects of planting density and genotype on Zn uptake could only be explained if the plants induced changes in the soil to make Zn more soluble; and (c) the genotype and planting density effects were both associated with decreases in dissolved CO2 in the rhizosphere soil solution and resulting increases in pH. We suggest the increases in pH caused solubilisation of soil Zn by dissolution of alkali-soluble, Zn-complexing organic ligands from soil organic matter. We conclude that differences in venting of soil CO2 through root aerenchyma were responsible for the genotype and planting density effects.
AU  - Affholder,M-C
AU  - Weiss,DJ
AU  - Wissuwa,M
AU  - Johnson-Beebout,SE
AU  - Kirk,GJD
DO  - 10.1111/pce.13069
EP  - 3030
PY  - 2017///
SN  - 0140-7791
SP  - 3018
TI  - Soil CO2 venting as one of the mechanisms for tolerance of Zn deficiency by rice in flooded soils.
T2  - Plant, Cell and Environment
UR  - http://dx.doi.org/10.1111/pce.13069
UR  - http://hdl.handle.net/10044/1/51349
VL  - 40
ER  -
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