Resistance genes on the verge of plant-virus interaction

Viruses are acellular pathogens that cause severe infections in plants, resulting in worldwide crop losses every year. The lack of chemical agents to control viral diseases exacerbates the situation. Thus, to devise proper management strategies, it is important that the defense mechanisms of plants against viruses are understood. Resistance (R) genes regulate plant defense against invading pathogens by eliciting a hypersensitive response (HR). Compatible interaction between plant R gene and viral avirulence (Avr) protein activates the necrotic cell death response at the site of infection, resulting in the cessation of disease. Here, we review different aspects of R gene-mediated dominant resistance against plant viruses in dicotyledonous plants and possible ways for developing crops with better disease resistance.

Automated summary

Viruses are acellular pathogens that cause severe infections in plants, resulting in worldwide crop losses every year. Understanding the defense mechanisms of plants against viruses is crucial for devising proper management strategies. Plant resistance genes can regulate defense against viruses by eliciting a hypersensitive response and activating necrotic cell death, thereby stopping the spread of the disease.