The nematode Meloidogyne incognita has caused an infection in the roots of the tobacco plant.
What makes a plant susceptible to infection?
If a plant’s physiological processes are altered as a consequence of external variables, then the plant is said to be susceptible to infection. This might result in the plant’s structure, development, functions, or other parameters becoming affected. The type of the infectious or non-infectious agent that causes a plant disease determines whether or not the illness is considered infectious.
How does a virus infect a plant?
In order for a virus to infect an entire plant, it first needs to enter the plant’s vascular system. Once there, the virus will travel through the sieve tubes of the phloem as the flow of substances carries it along; this is how the virus infects cells that are located in locations that are distant from the initial site of infection.
How do infectious diseases spread from one plant to another?
On the other hand, infectious illnesses are capable of spreading from one vulnerable host to another due to the fact that the infectious agent can proliferate either within the plant itself or on the surface of the plant itself.
How do bacteria enter a plant?
It is necessary for the organism to enter the plant through one of its naturally occurring apertures or wounds. The majority of bacteria spend the winter mostly in the soil and in or on plant matter that does not disintegrate, however some bacteria spend the winter within insect vectors (Figure 64).
Which part of the tobacco plant is infected by Meloidogyne incognita a flower c stem b leaf D root?
Therefore, the answer that you should select is ″Root.″
Which part of the tobacco plant is affected by nematodes?
Root-knot nematodes are a kind of plant-parasitic nematode that belongs to the genus Meloidogyne.They are found in the ground in areas that have long, hot summers and short, mild winters.The invasion of plant roots by root-knot nematode larvae results in the formation of root-knot galls, which are responsible for the removal of nutrients from the plant.Therefore, the solution that should be chosen is D Root.
Which nematodes infect the root of tobacco plants?
The roots of tobacco plants are susceptible to infection by the nematode Meloidogyne incognita.
What is the nematode damage of tobacco?
Damage caused by nematodes can result in yield losses of up to 500–600 pounds per acre, which is equivalent to $1,000 per acre. Csinos has observed plants that were never able to grow taller than 12 inches, which is deemed a loss of one hundred percent. The root system of a tobacco plant can get infected with nematodes, which results in a swelling or gall on the root.
How do nematodes affect tobacco plants?
When tobacco is infected with nematodes, the roots can get bloated, develop knots, and even decay. This can happen both in the nursery and in the field. Plants may also become stunted, yellow, and wilt as a result of this condition. Nematodes are the culprits behind root knots.
Which of the following infects the roots of tobacco plants reducing the production of tobacco?
The presence of Meloidogyne incognita, which infects the roots of tobacco plants, results in a significant decrease in output.
What is RNA interference in tobacco plant?
RNA interference, often known as RNAi, is a potential strategy for managing nuisance insects. This method works by suppressing the expression of key insect genes in order to disrupt the development and physiology of the insect. However, many insect orders are immune to this process.
Which is the root knot nematode?
Information that is generic Root-knot nematodes, also known as Meloidogyne species, are very small invertebrates that resemble worms and are found quite often in soil. They may infect a broad variety of hosts, including annual and perennial crops, where they pose issues.
Which organism infect the root of tobacco plant and causes a great loss of reduction in yield?
Meloidegyne incognita is the problem, and it infects the roots of the tobacco plant, which leads to a significant decrease in output.
How does Meloidogyne incognita infect tobacco?
Abstract. Meloidogyne incognita, often known as the root-knot nematode (RKN), is a kind of worm that reproduces on the roots of tobacco plants (Nicotiana tabacum). This parasite is responsible for yearly crop damage, decreased crop production, and economic losses.
How is transgenic tobacco plant protected against Meloidogyne incognita?
A mechanism based on RNA interference, which is a type of cellular defense that is possessed by all eukaryotic organisms, was used to defend the transgenic tobacco plant from the parasite.
How are transgenic tobacco plants produced to solve this problem?
Tobacco plants that have been genetically modified are created in the following way: I A technique based on the process of RNA interference was developed as a means of reducing the risk of infections occurring at the roots of tobacco plants (RNAi). (ii) Genes unique to the nematodes were transferred into the host plants through the use of Agrobacterium as a vector.