Describe the structure of plant virus with diagram
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Answer:
Viruses are infectious pathogens that are too small to be seen with a light microscope, but despite their small size they can cause chaos. The simplest viruses are composed of a small piece of nucleic acid surrounded by a protein coat. As is the case with other organisms, viruses carry genetic information in their nucleic acid which typically specifies three or more proteins. All viruses are obligate parasites that depend on the cellular machinery of their hosts to reproduce. Viruses are not active outside of their hosts, and this has led some people to suggest that they are not alive. All types of living organisms including animals, plants, fungi, and bacteria are hosts for viruses, but most viruses infect only one type of host. Viruses cause many important plant diseases and are responsible for losses in crop yield and quality in all parts of the world.
The purpose of this chapter is to provide an overview of the fascinating microscopic world of plant viruses and to describe the basic concept of a virus, the structure of virus particles and genomes, virus life cycles, the evolution and diversity of plant viruses, as well as the common manifestations of plant virus diseases and major approaches to managing these diseases. We hope to convey to the reader our grudging admiration for these small pathogens and for their success in manipulating their plant hosts so successfully
