Question

Which part of the tobacco plant is infected by Meloidogyne incognita?
A. Flower
B. Leaf
C. Stem
D. Root

Answer 1

Hint: In the Heteroderidae family, Meloidogyne incognita is a plant-parasitic roundworm. In regions with hot summers or brief winters, Meloidogyne incognita live in the soil.

Complete Answer:
- Tobacco, Nicotiana tabacum, is an annual or perennial herbaceous plant cultivated for its leaves within the Solanaceae family. The tobacco plant has a dense, hairy stem and large, simple, oval shape leaves.
- The tobacco plant grows cream, white, red or pink flowers that are tubular in appearance and can reach a length of 3.5-5.5 cm and they form in clusters. Tobacco can attain a height of 4-6 ft. It is typically grown annually and can only survive one growing season. Tobacco can also be referred to Virginia tobacco and originally came from South America.

Now, let us find the solution from the options-
- Meloidogyne incognita is a root-knot nematode that only roots. Thus, the options A, B, and C are incorrect.
- Meloidogyne incognita infects the roots of tobacco plants. Plant-parasitic nematodes from the genus Meloidogyne are root-knot nematodes. In regions with hot summers or brief winters, they exist in the soil. Root-knot nematode larvae invade plant roots, allowing root-knot galls to form that extract nutrients from the plant.

Thus, the correct answer is option D Root.

Note: Plants which are influenced by M. Incognita exhibits water and nutrient stress, wilting, yellowing, and stunting symptoms above ground. The common symptom is under-ground galling on roots, tubers, bulbs. Plant death can occur at a high degree of infestation.