Roles of shoots and roots in cadmium uptake and distribution in tubers of potato (Solanum tuberosum L)

Aim Potato cultivars vary in biomass production and Cd concentration. Differences in growth can lead to differences in tuber cadmium (Cd) concentration through growth dilution and/or limited uptake of Cd from the soil. The aims of this study were to investigate the relative importance of shoot (abov...

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Bibliographic Details
Published in:Plant and soil 2018-09, Vol.430 (1/2), p.139-149
Main Authors: Mengist, Molla F., Milbourne, Dan, Alves, Sheila, McLaughlin, Mike J., Jones, Peter W., Griffin, Denis
Format: Article
Language:English
Subjects:
Accumulation
Biomedical and Life Sciences
Cadmium
Cultivars
Dilution
Ecology
Genotypes
Health aspects
Life Sciences
Organs
Plant Physiology
Plant Sciences
Plant-soil relationships
Potatoes
REGULAR ARTICLE
Roots
Roots (Botany)
Shoots
Shoots (Botany)
Soil conditions
Soil investigations
Soil Science & Conservation
Tubers
Weight
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Summary:Aim Potato cultivars vary in biomass production and Cd concentration. Differences in growth can lead to differences in tuber cadmium (Cd) concentration through growth dilution and/or limited uptake of Cd from the soil. The aims of this study were to investigate the relative importance of shoot (above ground plant parts) and root in dry weight (DW) accumulation, total Cd uptake and Cd distribution between organs and how this affects tuber Cd concentration. Materials and methods Three experiments were carried out, two with reciprocal grafting between high and low tuber Cd accumulating cultivars under two soil Cd conditions, and the other was involving the evaluation of F 1 genotypes, from a cross between these high and low tuber Cd accumulating cultivars. These experiments were carried out under controlled greenhouse conditions. Results The results showed that the root system is important for total Cd uptake but less important for growth and Cd distribution between organs. On the other hand, the shoot system is important for regulating growth of shoot and roots, and for determining Cd distribution between organs. Conclusion The data suggest that tuber Cd concentration was mainly regulated by shoot source and to a lesser extent by total uptake of Cd.
ISSN:0032-079X
1573-5036
DOI:10.1007/s11104-018-3717-3