Abstract
Plant viruses are globally responsible for the significant crop losses of economically important plants. All common approaches are not able to eradicate viral infection. Many non-conventional strategies are currently used to control viral infection, but unfortunately, they are not always effective. Therefore, it is necessary to search for efficient and eco-friendly measures to prevent viral diseases. Since the genomic material of 90% higher plant viruses consists of single-stranded RNA, the best way to target the viral genome is to use ribonucleases (RNase), which can be effective against any viral disease of plants. Here, we show the importance of the search for endophytes with protease and RNase activity combined with the capacity to prime antiviral plant defense responses for their protection against viruses. This review discusses the possible mechanisms used to suppress a viral attack as well as the use of local endophytic bacteria for antiviral control in crops.
Highlights
Viruses are obligate intracellular parasites that infect almost every living creature [1], including all cultivated crops
No data are available on the interactions of these biological agents with plants, and, as we suggest, a low efficiency of these agents observed in some cases arises from the lack of plant/plant-growth promoting microorganism (PGPM) relations resulting in a negative environmental influence on microorganisms
We suggest that the ability of PGPM to act jointly in consortiums is an opportunity for the development of effective and diversified microorganisms containing antiviral products for plant protection
Summary
Viruses are obligate intracellular parasites that infect almost every living creature [1], including all cultivated crops. The effective viral disease management needs integration of all available strategies, which include avoidance of source of infection, vector control by various means, modification in cultivation practices, and the use of host resistance for viruses and vectors [5]. One of the effective means to control virus vectors is the application of bactericides, insecticides, and fungicides. Another approach is to develop virus-resistant (transgenic) plants capable of eliminating vectors by producing insect toxins, Cry and Vip proteins from plant-growth promoting microorganism (PGPM). Currently there are no effective chemical means to eliminate viral particles in plants. The ability of PGPM to protect plants against pathogens and pests [25,26,27,28] makes them a significant resource for the development of biocontrol agents against plant viruses
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