Plant defense against virus diseases; growth hormones in highlights

We focus upon plant–virus interactions associated with hormonal production, manipulations, and signaling

Waqar Islam; Hassan Naveed; Madiha Zaynab; Zhiqun Huang; Han Y. H. Chen

2019

Scholarcy highlights

  • Plant viruses utilize numerous strategies that are more conducive for replication and viral spread inside the plant’s cellular environment. Phytohormone accumulation and signaling pathways can be directly or indirectly disrupted due to virus infections. Several phytohormone pathways exist within plants, contributing to plant growth, reproduction, and development. Ethylene, jasmonic acid, and salicylic acid play an important role in mechanisms of defense. abscisic acid, auxin, cytokinins, gibberellins, and brassinosteroids show defense relations but play vital roles in plant physiology and development. there is ‘cross talk’ and extensive interactions between different pathways of phytohormones, providing information to regulate environmental cue responses or attack of pathogens. Here, we discuss the role of various phytohormones in disease symptom development, host defenses, and enhanced virus replication and movement
  • PR1 production in infected leaves, indicating that plant defense was attenuated because of systemic movement of Tobacco mosaic virus. These results show that TMV-targeted ATAF2 degradation is responsible for the salicylic acid-mediated defense suppression
  • Phytohormones are significant in numerous aspects of plant– virus interactions
  • It has been found that cross talk between the pathways of phytohormones is critical for virus defense response regulation
  • Which Auxregulated genes are responsible for the development of symptoms or which SA-mediated processes impact directly on the accumulation of virus are just one of the few questions that are still unanswered
  • We should focus on molecular mechanisms that how viruses target and modulate the synthesis of plant hormone and sensing systems to avoid plant defenses, enhancing their movement and infection ability

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