Viral Diseases of Leaf - Virology - The Biology Notes

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ss RNA

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Biology

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1

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.

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2

Adolph Mayer

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

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3

Charles Chamberland

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

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4

RNA Penetration

The disease is caused by ________ into the cell.

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5

TMV genome

The ________ consists of a 6.3- 6.5 kb.

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6

protein coat

The ________ consists of helically arranged capsomeres.

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7

RNA

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

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8

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.

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9

Replication

________ occurs in the cytoplasm of plants.

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10

Pakistan

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

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11

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.

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12

White Fly

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

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13

capsomers

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

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14

Plant viruses

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

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15

Cotton

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

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16

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.

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17

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.

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18

Tobacco mosaic virus

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

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19

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.

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20

Pakistan

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

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21

Replication

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

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