期刊
ANNALS OF BOTANY
卷 126, 期 1, 页码 119-140出版社
OXFORD UNIV PRESS
DOI: 10.1093/aob/mcaa055
关键词
Mineral element; concentration; content; phosphorus; Brassica napus; quantitative trait locus
资金
- Applied Basic Research Fronts Program of Wuhan city [2018020401011302]
- National Key R&D Program of China [2017YFD0200200]
- National Nature Science Foundation of China [31972498]
- Fundamental Research Funds for the Central Universities of China [2662019PY013]
- Rural and Environment Science and Analytical Services Division (RESAS) of the Scottish Government
- Natural Research Funds for the Central Universities of China [2662019PY013]
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 11 mineral elements (B, Ca, Cu, Fe, K, Mg, Mn, Na, P, S and Zn) were investigated by inductively coupled plasma optical emission spectrometry (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 i.P, 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 P starvation. There was a significant difference in mineral element composition between shoots and roots. Identification of the genes underlying these QTLs will enhance our understanding of processes affecting the uptake and partitioning of mineral elements in Brassica napus.
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