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Emerging Molecular Links Between Plant Photomorphogenesis and Virus Resistance

Authors
  • Zhai, Ying1
  • Peng, Hao2
  • Neff, Michael M.2
  • Pappu, Hanu R.1
  • 1 Department of Plant Pathology, Washington State University, Pullman, WA , (United States)
  • 2 Department of Crop and Soil Sciences, Washington State University, Pullman, WA , (United States)
Type
Published Article
Journal
Frontiers in Plant Science
Publisher
Frontiers Media SA
Publication Date
Jun 30, 2020
Volume
11
Identifiers
DOI: 10.3389/fpls.2020.00920
PMID: 32695129
PMCID: PMC7338571
Source
PubMed Central
Keywords
License
Unknown

Abstract

Photomorphogenesis refers to photoreceptor-mediated morphological changes in plant development that are triggered by light. Multiple photoreceptors and transcription factors (TFs) are involved in the molecular regulation of photomorphogenesis. Likewise, light can also modulate the outcome of plant–virus interactions since both photosynthesis and many viral infection events occur in the chloroplast. Despite the apparent association between photosynthesis and virus infection, little is known about whether there are also interplays between photomorphogenesis and plant virus resistance. Recent research suggests that plant–virus interactions are potentially regulated by several photoreceptors and photomorphogenesis regulators, including phytochromes A and B (PHYA and PHYB), cryptochromes 2 (CRY2), phototropin 2 (PHOT2), the photomorphogenesis repressor constitutive photomorphogenesis 1 (COP1), the NAM, ATAF, and CUC (NAC)-family TF ATAF2, the Aux/IAA protein phytochrome-associated protein 1 (PAP1), the homeodomain-leucine zipper (HD-Zip) TF HAT1, and the core circadian clock component circadian clock associated 1 (CCA1). Particularly, the plant growth promoting brassinosteroid (BR) hormones play critical roles in integrating the regulatory pathways of plant photomorphogenesis and viral defense. Here, we summarize the current understanding of molecular mechanisms linking plant photomorphogenesis and defense against viruses, which represents an emerging interdisciplinary research topic in both molecular plant biology and virology.

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