Genetic dissection of the shoot and root ionomes of Brassica napus grown with contrasting phosphate supplies

Wang, W., Ding, G., White, P. J., Wang, M., Zou, J., Xu, F., Hammond, J. P. ORCID: https://orcid.org/0000-0002-6241-3551 and Shi, L. (2020) Genetic dissection of the shoot and root ionomes of Brassica napus grown with contrasting phosphate supplies. Annals of Botany, 126 (1). pp. 119-140. ISSN 0305-7364 doi: 10.1093/aob/mcaa055

Abstract/Summary

Background and Aims Mineral elements have many essential and beneficial functions in plants. Phosphorus (P) deficiency can result in changes in the ionomes of plant organs. The aims of this study were to characterize the effects of P supply on the ionomes of shoots and roots, and to identify chromosomal quantitative trait loci (QTLs) for shoot and root ionomic traits, as well as those affecting the partitioning of mineral elements between shoot and root in Brassica napus grown with contrasting P supplies. Methods Shoot and root concentrations of eleven mineral elements (B, Ca, Cu, Fe, K, Mg, Mn, Na, P, S and Zn) were investigated by ICP-OES in a Brassica napus double haploid population grown at an optimal (OP) and a low phosphorus supply (LP) in an agar system. Shoot, root and plant contents, and the partitioning of mineral elements between shoot and root were calculated. Key Results The tissue concentrations of B, Ca, Cu, K, Mg, Mn, Na, P and Zn were reduced by P starvation, while the concentration of Fe was increased by P starvation in the BnaTNDH population. A total of 133 and 123 QTLs for shoot and root ionomic traits were identified at OP and LP, respectively. A major QTL cluster on chromosome C07 had a significant effect on shoot Mg and S concentrations at LP and was narrowed down to a 2.1-Mb region using an advanced backcross population. Conclusions The tissue concentration and partitioning of each mineral element was affected differently by phosphorus starvation. There was a significant difference in mineral element composition between shoots and roots.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/90336
Identification Number/DOI	10.1093/aob/mcaa055
Refereed	Yes
Divisions	Interdisciplinary centres and themes > Soil Research Centre Life Sciences > School of Agriculture, Policy and Development > Department of Crop Science
Publisher	Oxford University Press
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