Chin Bull Bot ›› 2016, Vol. 51 ›› Issue (3): 377-386.doi: 10.11983/CBB15101

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Advances in Biological Function of Arabidopsis Bifunctional Enzyme SAL1

Hongmei Xi1, 2, Wenzhong Xu1, Mi Ma1*   

  1. 1Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    2College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2015-06-09 Accepted:2015-11-01 Online:2016-05-24 Published:2016-05-05
  • Contact: Ma Mi E-mail:mami@ibcas.ac.cn
  • About author:

    ? These authors contributed equally to this paper

Abstract:

SAL1 was previously identified as a negative regulator of stress and abscisic acid (ABA) signaling that mediates the Arabidopsis response to adverse environmental stresses. Forward genetic methods have produced a growing body of evidence showing that SAL1 has wide biological functions. Here we review the structure, location and function of SAL1 and its effect on plant morphology and development, mineral nutrition, response to adverse environmental conditions and plant hormone-signaling response in Arabidopsis. We discuss possible future directions that might provide valuable information for further research on SAL1.

Fig. 2

Scheme of involvement of SAL1 bifunctional enzyme in plant physiological processes(Bifunctional enzyme SAL1 is involved in regulation of plant physiological processes through catabolism of PAP or Ins(1,4)P2/Ins(1,3,4)P3. PAP could either negatively regulate RNA silencing through inhibition of the XRNs activity, or affect gene expression, mineral nutrient metabolism or plant hormone responses, thus consequently regulate various physiological processes. Ins(1,4)P2/Ins(1,3,4)P3 affect plant growth and development mainly by influencing on the Ins(1,4,5)P3—Ca2+ signaling pathway and plant hormone response regulation. Certain biological processes, such as plant hormone responses, are under coregulation of PAP and Ins(1,4)P2/Ins(1,3,4)P3. Of the schematic diagram, arrows indicate positive regualtion, vertical lines indicate negative regulation, dash lines mean lack of direct evidence and question marks represent questions waiting to be answered.)"

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