Indranil Dasgupta

Friday Seminar by Dr. Gaurav Kumar


IDG Lab/ Friday/ August 16, 2019/ 3.30 pm/ Role of Abscisic Acid in Plant-Virus Interaction
Category: Research
Posted by: bedineel

 

Role of Abscisic Acid in Plant-Virus Interaction:

Sentinel or Rogue Agent?

 

Abscisic acid (ABA) is a key hormone involved in tuning responses to several abiotic stresses and also has remarkable impacts on plant defense against various pathogens. The roles of ABA in plant defense against bacteria and fungi are multifaceted, inducing or reducing defense responses depending on its time of action. However, ABA induces different resistance mechanisms to viruses regardless of the induction time. Studies have linked ABA to the antiviral silencing pathway, which interferes with virus accumulation, and the micro RNA pathway through which ABA affects the maturation and stability of miRNAs. ABA also induces callose deposition at plasmodesmata, a mechanism that limits viral cell-to-cell movement. In spite of these antiviral activities, recently, ABA is also reported to show positive role towards virus susceptibility. ABA-related suppressed resistance has been reported for two RNA viruses, bamboo mosaic virus and cucumber mosaic virus. Besides, ABA is found to negatively modulate plant defence against rice black‐streaked dwarf virus infection by suppressing the jasmonate pathway and regulating reactive oxygen species levels in rice. These findings have attributed the novel multifaceted role of ABA in plants in terms of their interaction with viruses, and have raised outstanding questions that require further investigations.
 
Suggested Readings:
  1. Alazem, M., He, M. H., Moffett, P., and Lin, N. S. (2017). Abscisic acid induces resistance against Bamboo mosaic virus through argonaute 2 and 3. Plant Physiol. 174, 339–355. doi: 10.1104/pp.16.00015
 
  1. Alazem, M., Lin, K. Y., and Lin, N. S. (2014). The abscisic acid pathway has multifaceted effects on the accumulation of Bamboo mosaic virus. Mol. Plant Microbe Interact. 27, 177–189. doi: 10.1094/MPMI-08-13-0216-R
 
  1. Anderson, J. P., Badruzsaufari, E., Schenk, P. M., Manners, J. M., Desmond, O. J., Ehlert, C., et al. (2004). Antagonistic interaction between abscisic acid and jasmonate-ethylene signaling pathways modulates defense gene expression and disease resistance in Arabidopsis. Plant Cell 16, 3460–3479. doi: 10.1105/tpc. 104.025833

 

  1. Chen, L., Zhang, L., Li, D., Wang, F. and Yu, D. (2013). WRKY8 transcription factor functions in the TMV-cg defense response by mediating both abscisic acid and ethylene signaling in Arabidopsis. Proceedings of the National Academy of Sciences, 110(21), pp.E1963-E1971.

 

  1. Xie, K., Li, L., Zhang, H., Wang, R., Tan, X., He, Y., Hong, G., Li, J., Ming, F., Yao, X. and Yan, F. (2018). Abscisic acid negatively modulates plant defence against rice black‐streaked dwarf virus infection by suppressing the jasmonate pathway and regulating reactive oxygen species levels in rice. Plant, cell & environment, 41(10), pp.2504-2514.