Metabolomics analysis reveals potential mechanisms of tolerance to excess molybdenum in soybean seedlings

Ecotoxicology and Environmental Safety
Shoujun XuXuecheng Sun

Abstract

Most plants exhibit strong tolerance to excess molybdenum (Mo). However, the metabolic profile and tolerance mechanisms of plants in response to excess Mo remain unknown. We comprehensively analyzed changes in the metabolic profiles of leaves and roots in soybean (Glycine max L.) seedlings cultured under normal-Mo and excess-Mo conditions by using ultra performance liquid chromatography (UPLC) combined with MS/MS (mass spectrometry). There were 42 differential metabolites in the roots and 19 differential metabolites in the leaves in response to excess Mo stress. In roots, the organic acids, levels of gluconic acid, D-glucarate and citric acid increased by 107.63-, 4.42- and 2.87-folds after excess Mo exposure. Several hormones (salicylic acid, jasmonic acid) and lipids (PG, MG, DG etc) also increased significantly under excess Mo condition. Metabolites related to ascorbate-glutathione metabolism and flavonoid and isoflavone biosynthesis notably accumulated in roots. Only lipid metabolism and salicylic acid accumulation were induced in leaves under excess Mo stress. It is speculated that organic compounds such as 2-oxoarginine, L-nicotine, gluconic acid, D-glucurate, and citric acid played important roles to chelate Mo and reduc...Continue Reading

Citations

Sep 12, 2019·Plant Signaling & Behavior·Gerry Aplang JanaMahmoud W Yaish
Dec 19, 2019·Metabolites·Ali RazzaqFozia Saleem
Jan 26, 2021·Plant Science : an International Journal of Experimental Plant Biology·Aitor VillateOier Aizpurua-Olaizola
May 22, 2021·Plant Physiology and Biochemistry : PPB·M Iqbal R KhanChirag Maheshwari

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