A protective role for the polyamine spermine against drought stress in Arabidopsis

Koji Yamaguchi, Yoshihiro Takahashi, Thomas Berberich, Akihiko Imai, Taku Takahashi, Anthony J. Michael, Tomonobu Kusano

    Research output: Contribution to journalArticlepeer-review

    204 Citations (Scopus)

    Abstract

    Cellular polyamine content often changes in response to abiotic stresses. However, its physiological relevance is unknown. We found that an Arabidopsis mutant plant (acl5/spms), which cannot produce spermine, is hypersensitive to high salt. Examination of drought sensitivity of the mutant and comparison with wild type plants indicated hypersensitivity to drought. This phenotype was cured by spermine pretreatment but not by the other polyamines putrescine and spermidine, suggesting that drought-hypersensitivity exhibited by the mutant is due to spermine deficiency. The water loss rate of wild type and mutant plants were similar until 20 min after onset of dehydration stress, but after a longer exposure the rate in mutant plants was higher than in wild type plants. Consistent with this result, the stomata of the mutant leaves remained open while in wild type leaves they closed. Based on the collected data, we discuss a role for spermine in response to drought stress.

    Original languageEnglish
    Pages (from-to)486-490
    Number of pages5
    JournalBiochemical and biophysical research communications
    Volume352
    Issue number2
    DOIs
    Publication statusPublished - 2007 Jan 12

    Keywords

    • Arabidopsis thaliana
    • Calcium homeostasis
    • Drought-stress
    • Polyamine
    • Spermine
    • Stomata

    ASJC Scopus subject areas

    • Biophysics
    • Biochemistry
    • Molecular Biology
    • Cell Biology

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