Metabolomics reveals the impact of nitrogen combined with the zinc supply on zinc availability in calcareous soil via root exudates of winter wheat (Triticum aestivum)

A possible mechanism for the improved availability of zinc (Zn) in soil by combining nitrogen (N) with Zn supply was investigated based on the root exudates of winter wheat. N, Zn supply as well as their combination significantly regulated nine root exudates in winter wheat; in which, the secretion...

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Veröffentlicht in:Plant physiology and biochemistry 2023-11, Vol.204, p.108069-108069, Article 108069
Hauptverfasser: Nie, Zhaojun, Wang, Linglu, Zhao, Peng, Wang, Zhenbo, Shi, Qiuzhe, Liu, Hongen
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Sprache:eng
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Zusammenfassung:A possible mechanism for the improved availability of zinc (Zn) in soil by combining nitrogen (N) with Zn supply was investigated based on the root exudates of winter wheat. N, Zn supply as well as their combination significantly regulated nine root exudates in winter wheat; in which, the secretion of cis-aconitic acid involving in the TCA cycle, C5-branched dibasic acid metabolism, glyoxylate and dicarboxylate metabolism and 2-oxocarboxylic acid metabolism was upregulated by N, Zn supply as well as their combination. N–Zn combination induced the activities of citrate synthase and cis-aconitase in roots and shoots of winter wheat thus to increase the concentrations of citric and aconitic acid; the decrease of isocitric acid concentrations in shoots indicated the inhibited conversion of aconitic acid to isocitric acid by N–Zn combination. It revealed a possible reason for the enhanced secretion of cis-aconitic acid by N–Zn combination. Exogenous addition of 10 μ plant−1 cis-aconitate significantly increased available Zn concentrations in soil and Zn concentrations in winter wheat under N–Zn combination. Thus, the N–Zn combination regulated the metabolism of cis-aconitic acid in winter wheat, thus enhancing the secretion of cis-aconitic acid to increase the bioavailability of Zn in soil. •N–Zn combination affected the composition of root secretions in wheat.•N–Zn combination regulated TCA cycle to promote the secretion of cis-aconitic acid.•Cis-aconitate acid enhanced Zn availability in soil and further Zn uptake in wheat.
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2023.108069