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Ca2+/calmodulin regulates salicylic-acid-mediated plant immunity

Author

Listed:
  • Liqun Du

    (Center for Integrated Biotechnology and Department of Horticulture,)

  • Gul S. Ali

    (Colorado State University, Fort Collins, Colorado 80523-1878, USA)

  • Kayla A. Simons

    (Center for Integrated Biotechnology and Department of Horticulture,)

  • Jingguo Hou

    (Washington State University, Pullman, Washington 99164-6414, USA
    Present address: Bioanalytical Services, Primera Analytical Solutions Corp., 259 Wall Street, Princeton, New Jersey 08540, USA.)

  • Tianbao Yang

    (Center for Integrated Biotechnology and Department of Horticulture,)

  • A. S. N. Reddy

    (Colorado State University, Fort Collins, Colorado 80523-1878, USA)

  • B. W. Poovaiah

    (Center for Integrated Biotechnology and Department of Horticulture,)

Abstract

Plant immunity: calcium/salicylic acid link Plant cells sense pathogens evoking a defence system that confers resistance to infection. One of the earliest steps in the plant defence pathway involves an increase in cytosolic calcium levels. However, the mechanisms by which Ca2+ signals result in an effective plant immune response are unclear. Salicylic acid is a key messenger for local and systemic resistance. In this study, Du et al. report a novel link between Ca2+signalling and salicylic acid-mediated responses. They show that AtSR1/CAMTA3, a Ca2+/calmodulin-binding transcription factor, negatively regulates salicylic acid responses by repressing EDS1, a key regulator of salicylic acid. Mutating AtSR1 results in an increase in salicylic acid levels and enhanced resistance to pathogens such as Pseudomonas syringae. Hence AtSR1 is a negative regulator of plant immunity by suppressing biosynthesis of salicylic acid.

Suggested Citation

  • Liqun Du & Gul S. Ali & Kayla A. Simons & Jingguo Hou & Tianbao Yang & A. S. N. Reddy & B. W. Poovaiah, 2009. "Ca2+/calmodulin regulates salicylic-acid-mediated plant immunity," Nature, Nature, vol. 457(7233), pages 1154-1158, February.
    • Handle: RePEc:nat:nature:v:457:y:2009:i:7233:d:10.1038_nature07612
    DOI: 10.1038/nature07612
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    Cited by:

    1. Mamoru Matsumura & Mika Nomoto & Tomotaka Itaya & Yuri Aratani & Mizuki Iwamoto & Takakazu Matsuura & Yuki Hayashi & Tsuyoshi Mori & Michael J. Skelly & Yoshiharu Y. Yamamoto & Toshinori Kinoshita & I, 2022. "Mechanosensory trichome cells evoke a mechanical stimuli–induced immune response in Arabidopsis thaliana," Nature Communications, Nature, vol. 13(1), pages 1-15, December.

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