Viral Diseases of Leaf - Virology - The Biology Notes

ss RNA

When a large number of capsomer proteins and ________ have accumulated in the infected cell, the virions are assembled spontaneously in a highly organized manner.

Adolph Mayer

In 1886 German- born ________, a Dutch investigator in Holland was first to point out that tobacco mosaic is readily transmissible and infectious.

Charles Chamberland

The field of virology really began to develop after the invention of bacterial filters by ________ in 1884.

RNA Penetration

The disease is caused by ________ into the cell.

TMV genome

The ________ consists of a 6.3- 6.5 kb.

protein coat

The ________ consists of helically arranged capsomeres.

RNA

Translation:-** Translation of viral ________ in the cytoplasm produces viral proteins that are required for the completion of the virus life cycle.

mechanical damage

It is believed that the virion enters the cytoplasm of the cell passively through wounds caused by ________ to the cuticle and cell wall.

Replication

________ occurs in the cytoplasm of plants.

Pakistan

In ________, cotton is grown on an area of 2.806 million hectares with a production of 13.983 million bales.

Martinus Beijerinck

It was started in the late 19th century, (1892) when Dutch microbiologist ________ and Russian researcher Dmitrii Iwanowski were investigating the cause of a mysterious disease of tobacco.

White Fly

________ feeds in Plant phloem sap by inserting its stylets in plant tissue and locating the vascular tissue.

capsomers

The ________ are assembled to form disks made up of two layers of helically arranged protomers.

Plant viruses

________ are unable to penetrate the plant cuticle and cell wall.

Cotton

________* (Gossypium hirsutum*) is the most important cash crop having a great agroeconomic significance throughout the world.

Positive sense ssRNA Virus

________ belongs to the genus* Tobamovirus* that infects a wide range of plants, especially tobacco and other members of the family Solanaceae or dicotyledonous plants.

Viruses Green

________ leaves contain chlorophyll, which is not only how the leaves get their green color but also a major ingredient in the photosynthesis process.

Tobacco mosaic virus

________ (TMV) and some other plant viruses are carried by the wind, raindrops, gardening equipment, and grazing animals to host plants.

DNA

The ________ viruses must be transported to the nucleus for transcription in order to gain access to the cell proteins required for the production of messenger RNA from viral DNA.

Pakistan

In ________, its epidemic was reported in 1993 when it infected 0.9 Million hectares of cotton in southern Punjab.

Replication

________:** The viral replication proteins combine with cellular proteins to produce a complex of proteins that manufactures multiple copies of the virus genome.