Question

What are the symptoms of virus infection in plants?

Answer 1

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the symptoms of virus infection in plants:

(i) Chlorosis:

It is characterized by the uneven distribution of chlorophyll in yellow and green patches on the leaf.
These patches are irregularly distributed among normal green tissues and make a mosaic pattern.
This is the most common symptom and is produced by various viruses
e.g.
mosaic of cucurbits,
mosaic of potato,
mosaic of sugarcane,
Tobacco mosaic 

(ii) Yellows:

In this symptom uniform chlorosis of the leaves take place.
e.g.
Rice yellows.

(iii) Root Symptoms:

Infected plants show the drying of lateral roots, over production of tumors and galls in roots.
e.g.
wound tumor disease of Pea.
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thanks....
nice to help you

Answer 2

The effects may also be named in terms indicating the processes altering the appearance of the diseased plants, e.g. 'edge yellowing' and 'mottling'. Both approaches lead to a different naming of symptoms: yellow edge - edge yellowing, mottle - mottling.