Comparison of L-Histidine Effects on Nickel Translocation into the Shoots of Different Species of the Genus Alyssum

I. V. Seregin*, A. D. Kozhevnikova, H. Schat

*Corresponding author for this work

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    The work dealt with the influence of free L-histidine on nickel (Ni) translocation into the shoots of the hyperaccumulator plants Alyssum murale, A. fallacinum, A. corsicum, A. tenium, A. lesbiacum, A. bertolonii, A. pintodasilvae, and A. obovatum and of the closely related non-hyperaccumulator Aurinia saxatilis (formerly Alyssum saxatile). The Ni concentration in the xylem sap was determined by graphite furnace or flame atomic absorption spectrophotometry. If plants were not treated with L-histidine or L-alanine, the highest Ni concentration was found in the xylem sap of A. murale and A. corsicum. When the plants were pretreated with L‑histidine, the Ni loading into the xylem vessels increased in only two hyperaccumulator species, A. pintodasilvae and A. obovatum, and in the non-hyperaccumulator A. saxatilis. The plant pretreatment with L-alanine did not increase the Ni level in the xylem sap. This indicates that the stimulation of Ni xylem loading is histidine-specific and not characteristic of any amino acid. Therefore, the role of histidine in the selective nickel accumulation in the shoots may considerably differ even in closely related plant species of one genus. This may presumably be accounted for by both different contents of endogenous histidine in the roots and specific patterns of the metal transport and distribution in different species.

    Original languageEnglish
    Pages (from-to)340-344
    Number of pages5
    JournalRussian Journal of Plant Physiology
    Volume66
    Issue number2
    DOIs
    Publication statusPublished - 1 Mar 2019

    Funding

    The work was partially supported by the Russian Foundation for Basic Research, project no. 15-04-02236, and by the LOCOMET International Scientific P-rogram. We are grateful to Prof. A.J.М. Baker (Melbourne, Australia) for kindly providing the seeds of the Alyssum murale, A. fallacinum, A. corsicum, A. tenium, A. lesbiacum, A. bertolonii, A. pintodasilvae , and Aurinia saxatilis; to Dr. M.N. Kataeva (Komarov Botanical Institute, Russian Academy of Sciences, St. Petersburg) for kindly providing the seeds of A. obovatum ; and to Prof. V.B. Ivanov (Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow) for the critical discussion of the results.

    FundersFunder number
    Russian Foundation for Basic Research15-04-02236

      Keywords

      • alanine
      • Alyssum
      • histidine
      • hyperaccumulators
      • nickel

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