Table of Contents
What are the symptoms of virus in plants?
Symptoms of virus infection include necrotic spots, abnormal dark green and light green mosaic and mottling of leaves, growth distortion, stunting, ring patterns or bumps on plant foliage, and abnormal flower coloration and formation. Plants may also be infected with more than one virus or viral strain.
What are the symptoms of plants infected by viruses Class 11?
The symptoms of the infection in plants are discoloration of leaves, a mosaic pattern of light and dark color of green, etc. The third option is the leaf curl of tomato which is caused by the Tomato yellow leaf curl virus. This virus has DNA as its genetic material.
What are the possible signs of a virus and viroid in plants?
Expression of commonly observed symptoms of viroid infection — stunting, leaf epinasty and distortion, fruit distortion and color break, stem and leaf necrosis, and even death of the whole plant — is often dependent upon environmental conditions. Also, many viruses can cause very similar symptoms.
Which diseases are caused by virus in plants?
Information
- TOBACCO MOSAIC VIRUS (TMV)
- TOMATO SPOTTED WILT VIRUS (TSWV)
- TOMATO YELLOW LEAF CURL VIRUS (TYLCV)
- CUCUMBER MOSAIC VIRUS (CMV)
- POTATO VIRUS Y (PVY)
- CAULIFLOWER MOSAIC VIRUS (CaMV)
- AFRICAN CASSAVA MOSAIC VIRUS (ACMV)
- PLUM POX VIRUS (PPV)
What are the main characteristics of a plant virus?
Most plant viruses are rod-shaped, with protein discs forming a tube surrounding the viral genome; isometric particles are another common structure. They rarely have an envelope.
Which of the following is incorrect viral infection symptoms in plants?
So, the correct option is ‘Red rot of sugarcane’.
What are 5 viral diseases?
Viral Diseases
- Chickenpox.
- Herpes.
- Influenza.
- AIDS.
- Mumps.
- Measles.
- Viral Hepatitis.
What is the difference between signs and symptoms in plant disease?
The thick, liquid exudate is primarily composed of bacteria and is a sign of the disease, although the canker itself is composed of plant tissue and is a symptom. A symptom of plant disease is a visible effect of disease on the plant.
What is a plant virus called?
By far, the largest number of plant viruses possess single-stranded (ss), positive-sense RNA genomes, and these viruses are called positive-strand RNA viruses. Examples of the most economically important families of the positive-strand RNA viruses are Bromoviridae, Closteroviridae, Luteoviridae, and Potyviridae.
What are the symptoms of viral infection?
Symptoms of viral infections
- Fever.
- Muscle ache.
- Cough.
- Sore throat.
- Headache.
What are symptoms in plants?
Symptoms are changes in plant growth or appearance in response to biotic or abiotic factors. Examples of symptoms include dieback, flagging, wilting, and chlorosis. The same symptom, such as dieback, can be produced by multiple causes.
What are the characteristics of viruses?
Characteristics
- Non living structures.
- Non-cellular.
- Contain a protein coat called the capsid.
- Have a nucleic acid core containing DNA or RNA (one or the other – not both)
- Capable of reproducing only when inside a HOST cell.
Which is the largest plant virus?
Potyviruses are the largest group of plant infecting RNA viruses that cause significant losses in a wide range of crops across the globe.
What are the symptoms of viral diseases in plants?
The most evident symptoms are those appearing in the leaves, although some viruses may cause symptoms in the stems, fruits, roots, or other parts of the plant. The most common symptom of viral diseases is slower development resulting in plant dwarfism.
What are the characteristics of plant viruses?
Plant viruses-general characteristics and examples of plant diseases caused by viruses. Virus is a submicroscopic, transmissible, intercellular, obligate parasite and consists of nucleic acid (either RNA or DNA), which is typically surrounded by a protein coat.
What is the objectives of plant virus research?
Objective – 1 Document the prevalence of the most economically important plant virus diseases and their vectors in the region of interest through surveys, and investigate the associated biology and ecology with a cropping systems perspective A foundation for designing IPM strategies for management of virus diseases
Why is the diagnosis of virus disease not always reliable?
“Symptom-based diagnosis of a virus disease is not always reliable Symptoms are variable due to: – crop species & cultivar-strain of a virus-age of the crop-environmental conditions-mixed virus infections-symptomless infections” Different viruses can produce similar symptoms-mosaic symptoms-necrotic symptoms “Accurate diagnosis