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    Ethylene signalling is involved in regulation of phosphate starvation-induced gene expression and production of acid phosphatases and anthocyanin in Arabidopsis

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    Type
    Article
    Authors
    Lei, Mingguang
    Zhu, Chuanmei
    Liu, Yidan
    Karthikeyan, Athikkattuvalasu S.
    Bressan, Ray Anthony
    Raghothama, Kashchandra G.
    Liu, Dong
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Date
    2010-11-30
    Online Publication Date
    2010-11-30
    Print Publication Date
    2011-03
    Permanent link to this record
    http://hdl.handle.net/10754/561638
    
    Metadata
    Show full item record
    Abstract
    With the exception of root hair development, the role of the phytohormone ethylene is not clear in other aspects of plant responses to inorganic phosphate (Pi) starvation. The induction of AtPT2 was used as a marker to find novel signalling components involved in plant responses to Pi starvation. Using genetic and chemical approaches, we examined the role of ethylene in the regulation of plant responses to Pi starvation. hps2, an Arabidopsis mutant with enhanced sensitivity to Pi starvation, was identified and found to be a new allele of CTR1 that is a key negative regulator of ethylene responses. 1-aminocyclopropane-1-carboxylic acid (ACC), the precursor of ethylene, increases plant sensitivity to Pi starvation, whereas the ethylene perception inhibitor Ag+ suppresses this response. The Pi starvation-induced gene expression and acid phosphatase activity are also enhanced in the hps2 mutant, but suppressed in the ethylene-insensitive mutant ein2-5. By contrast, we found that ethylene signalling plays a negative role in Pi starvation-induced anthocyanin production. These findings extend the roles of ethylene in the regulation of plant responses to Pi starvation and will help us to gain a better understanding of the molecular mechanism underlying these responses. © 2010 The Authors. New Phytologist © 2010 New Phytologist Trust.
    Citation
    Lei, M., Zhu, C., Liu, Y., Karthikeyan, A. S., Bressan, R. A., Raghothama, K. G., & Liu, D. (2010). Ethylene signalling is involved in regulation of phosphate starvation-induced gene expression and production of acid phosphatases and anthocyanin in Arabidopsis. New Phytologist, 189(4), 1084–1095. doi:10.1111/j.1469-8137.2010.03555.x
    Sponsors
    We thank the Arabidopsis Biological Resource Center and Dr Hongwei Guo of Peking University for providing the mutant seeds of etr1-1, eto1-1, ctr1-1 and ein2-5. Thanks are also due to Ms Hui Yuan for her technical assistance and to Bo Zhang and Liqiang Tang of Cold Spring Science Corporation for their help in setting up the CCD imaging system. This work was supported by the National Natural Science Foundation of China (grant no. 30670170), the National Key Basic Research Program of China (grant no. 2009CB119100) and Beijing Natural Science Foundation (grant no. 5082010).
    Publisher
    Wiley
    Journal
    New Phytologist
    DOI
    10.1111/j.1469-8137.2010.03555.x
    PubMed ID
    21118263
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1469-8137.2010.03555.x
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Center for Desert Agriculture

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