JUNGBRUNNEN1, a Reactive Oxygen Species–Responsive NAC Transcription Factor, Regulates Longevity in Arabidopsis

A. Wu, A. Devi Allu, P. Garapati, H. Siddiqui, H. Dortay, M.I. Zanor, M. Amparo Asensi-Fabado, S. Munne´ -Bosch, C. Antonio, T. Tohge, A.R. Fernie, K. Kaufmann, G.P. Xue, B. Mueller-Roeber, S. Balazadeh

    Research output: Contribution to journalArticleAcademicpeer-review

    268 Citations (Scopus)

    Abstract

    The transition from juvenility through maturation to senescence is a complex process that involves the regulation of longevity. Here, we identify JUNGBRUNNEN1 (JUB1), a hydrogen peroxide (H2O2)-induced NAC transcription factor, as a central longevity regulator in Arabidopsis thaliana. JUB1 overexpression strongly delays senescence, dampens intracellular H2O2 levels, and enhances tolerance to various abiotic stresses, whereas in jub1-1 knockdown plants, precocious senescence and lowered abiotic stress tolerance are observed. A JUB1 binding site containing a RRYGCCGT core sequence is present in the promoter of DREB2A, which plays an important role in abiotic stress responses. JUB1 transactivates DREB2A expression in mesophyll cell protoplasts and transgenic plants and binds directly to the DREB2A promoter. Transcriptome profiling of JUB1 overexpressors revealed elevated expression of several reactive oxygen species–responsive genes, including heat shock protein and glutathione S-transferase genes, whose expression is further induced by H2O2 treatment. Metabolite profiling identified elevated Pro and trehalose levels in JUB1 overexpressors, in accordance with their enhanced abiotic stress tolerance. We suggest that JUB1 constitutes a central regulator of a finely tuned control system that modulates cellular H2O2 level and primes the plants for upcoming stress through a gene regulatory network that involves DREB2A
    Original languageEnglish
    Pages (from-to)482-506
    JournalThe Plant Cell
    Volume24
    Issue number2
    DOIs
    Publication statusPublished - 2012

    Keywords

    • programmed cell-death
    • heat-stress response
    • leaf senescence
    • gene-expression
    • hydrogen-peroxide
    • oxidative stress
    • glucosinolate biosynthesis
    • comprehensive analysis
    • environmental-stress
    • functional-genomics

    Fingerprint Dive into the research topics of 'JUNGBRUNNEN1, a Reactive Oxygen Species–Responsive NAC Transcription Factor, Regulates Longevity in Arabidopsis'. Together they form a unique fingerprint.

  • Cite this

    Wu, A., Devi Allu, A., Garapati, P., Siddiqui, H., Dortay, H., Zanor, M. I., ... Balazadeh, S. (2012). JUNGBRUNNEN1, a Reactive Oxygen Species–Responsive NAC Transcription Factor, Regulates Longevity in Arabidopsis. The Plant Cell, 24(2), 482-506. https://doi.org/10.1105/tpc.111.090894