The plant immunity inducer pipecolic acid accumulates in the xylem sap and leaves of soybean seedlings following Fusarium virguliforme infection

Plant Science : an International Journal of Experimental Plant Biology
Nilwala S AbeysekaraMadan K Bhattacharyya

Abstract

The causal agent of the soybean sudden death syndrome (SDS), Fusarium virguliforme, remains in infected roots and secretes toxins to cause foliar SDS. In this study we investigated the xylem sap, roots, and leaves of F. virguliforme-infected and -uninfected soybean seedlings for any changes in a set of over 3,000 metabolites following pathogen infection by conducting GC/MS and LC/MS/MS, and detected 273 biochemicals. Levels of many intermediates of the TCA cycle were reduced suggesting suppression of this metabolic pathway by the pathogen. There was an increased accumulation of peroxidated lipids in leaves of F. virguliforme-infected plants suggesting possible involvement of free radicals and lipoxygenases in foliar SDS development. Levels of both isoflavone conjugates and isoflavonoid phytoalexins were decreased in infected roots suggesting degradation of these metabolites by the pathogen to promote root necrosis. The levels of the plant immunity inducer pipecolic acid (Pip) and the plant hormone salicylic acid (SA) were significantly increased in xylem sap (in case of Pip) and leaves (in case of both Pip and SA) of F. virguliforme-infected soybean plants compared to the control plants. This suggests a major signaling role of ...Continue Reading

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Citations

Nov 22, 2016·The Plant Journal : for Cell and Molecular Biology·Rémi PeyraudDominique Roby
Jul 24, 2018·The Plant Journal : for Cell and Molecular Biology·Michael Hartmann, Jürgen Zeier
Oct 15, 2018·The New Phytologist·Satoshi EndoHiroo Fukuda
Jul 3, 2021·Foods·Felipe Sanchez BragagnoloAlejandro Cifuentes
May 5, 2021·Pest Management Science·Maria C RodriguezSebastián Asurmendi
Mar 31, 2019·Current Opinion in Plant Biology·Michael Hartmann, Jürgen Zeier

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