PROF. XIA, Yiji (夏亦薺)

Professor and Head of Department

Ph.D. (Iowa State University)
M.Sc. (Chinese Academy of Agricultural Sciences)
B.Sc. (Hons.) (Zhejiang Agricultural University, Ningbo)


  • Redox signaling in stress responses
  • Plant-pathogen interactions
  • Functional genomics and proteomics
  • Plant reproduction

    Prof. Xia has obtained a total of HK$12 million external research funding in the last four years

    As a PI or project coordinator

    1. Extra Large G Protein 2 (XLG2) in Plant Immunity: What Is Its Molecular Mode of Action?
      Source: RGC/GRF
      Amount: HK$1,039,239
      Duration: 01/2014-12/2016
    2. Defining the Role of Two Nudix proteins in the defense response in Arabidopsis
      Source: RGC/GRF
      Amount: HK$1,830,800
      Duration: 01/2013-12/2015
    3. Defining the mechanism that regulates malegametogenesis and floral meristem determinacy by an E3 ubiquitin ligase in Arabidopsis
      Source: RGC/GRF
      Amount: HK$1,092,500
      Duration: 01/2012-12/2014
    4. Identification of redox-sensitive proteins and characterization of their functions in regulating the oxidative stress response in Arabidopsis
      Source: RGC/GRF
      Amount: HK$$5,000,000
    5. Functional characterization of a redox-sensitive Anamorsin family protein in Arabidopsis
      Source: RGC/GRF
      Amount: HK$1,725,000

    As a co-PI or co-I
    One AoE project (2013-2017), two CRF projects (2012-2015), and one 973 project (2011-2014).


    Prof. Xia’s publications have been cited over 3600 times.

    As a corresponding author:

    1. Wang H, Lu Y, Jiang T, Berg H, Li C, Xia Y (2013) The Arabidopsis U-box/ARM repeat E3 ligase AtPUB4 influences growth and degeneration of tapetal cells and its mutation leads to conditional male sterility. Plant Journal DOI: 10.1111/tpj.12146. (the journal’s 5 year impact factor=7.12)
    2. Wang H, Lu Y, Liu P, Wen W, Zhang J, Ge X, Xia Y (2013) The ammonium/nitrate ratio is an input signal in the temperature-modulated, SNC1-mediated and EDS1- dependent autoimmunity of nudt6-2 nudt7. Plant Journal, 73:262-275. (IF=7.12).
    3. Zhi H, Tang L, Xia Y, J Zhang (2013) Ssk1p-Independent Activation of Ssk2p Plays an Important Role in the Osmotic Stress Response in Saccharomyces cerevisiae: Alternative Activation of Ssk2p in Osmotic Stress. PLOS One, 8 (2): e54867. (IF=4.09).
    4. Wang H, Wang S, Lu Y, Alvarez S, Hicks L, Ge X, Xia Y (2012) Proteomic Analysis of Early-Responsive Redox-Sensitive Proteins in Arabidopsis. Journal of Proteome Research, 11:412-424. (IF=5.41).
    5. Lu Y, Li C, Wang H, Chen H, Berg H, Xia Y (2011) AtPPR2, an Arabidopsis pentatricopeptide repeat protein, binds to plastid 23S rRNA and plays an important role in the first mitotic division during gametogenesis and in cell proliferation during embryogenesis. Plant Journal 67:13-25. (IF=7.12).
    6. Xie YD , Li W , Guo D , Dong J , Zhang J, Fu Y, Ren D, Peng M, Xia Y (2010) The Arabidopsis gene SIGMA FACTOR-BINDING PROTEIN 1 plays a role in the salicylate- and jasmonate-mediated defence responses. Plant, Cell & Environment 33:828-839. (IF=5.75).
    7. Zhu H, Li G, Ding L, Berg H, Cui X, Assmann S, Xia Y (2009) Arabidopsis Extra Large G Protein 2 (XLG2) interacts with the G subunit of heterotrimeric G protein and functions in disease resistance. Molecular Plant 2: 513-525. (IF=5.42).
    8. Ge X, Li G, Wang S, Zhu H, Zhu T, Wang X, Xia Y (2007) AtNUDT7, a negative regulator of basal immunity in Arabidopsis, modulates two distinct defense response pathways and is involved in maintaining redox homeostasis. Plant Physiology, 145:204-215. (IF=7.05).
    9. Ge X, Dietrich C, Matsuno M, Li G, Berg H, Xia Y (2005) An Arabidopsis aspartic protease functions as an anti-cell death component in reproduction and embryogenesis. EMBO Reports, 6:282-288. (IF=7.37).
    10. Xia Y, Suzuki H, Borevitz J, Blount J, Guo Z, Dixon R, and Lamb C (2004) An extracellular aspartic protease in Arabidopsis functions in disease resistance signaling. EMBO Journal, 23:980-988. (IF=8.83).
    11. Xia Y* (2004) Proteases in pathogenesis and plant defense. Cellular Microbiology, 6:906-913. Invited review. (IF=5.30).
    12. Other representative publications

    13. Borevitz# J, Xia# Y, Blount J, Dixon R, C Lamb. (2000) Activation tagging identifies a conserved MYB regulator of phenylpropanoid biosynthesis. Plant Cell 12, 2383-2394. #Co-first authors. (IF=10.22).
    14. Delledonne# M, Y Xia#, R Dixon and C Lamb (1998) Nitric oxide functions as a signal in plant disease resistance. Nature, 394:585-588. #Co-first authors. (IF=36.24).
    15. Xia Y, BJ Nikolau, and PS Schnable (1997) Developmental and hormonal regulation of the Arabidopsis CER2 gene which codes for a nuclear localized protein required for the normal accumulation of cuticular waxes. Plant Physiology 115:925-937. (IF=7.05).
    16. Xia Y, BJ Nikolau, PS Schnable (1996) Cloning and characterization of CER2, an Arabidopsis gene that affects cuticular wax accumulation. Plant Cell, 8:1291-1304. (IF=10.22).
    17. Civardi L, Xia Y, K Edwards, PS Schnable, BJ Nikolau (1994) The relationship between the genetic and physical distances of the cloned a1-sh2 interval of the Zea mays L. genome. Proc Natl Acad Sci USA 91:8268-8272. (IF=10.47).


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