Plants are damaged because the galls or root knots block the transport of water and nutrients through the plant. Nematode feeding sites in the roots can also provide entrance for other disease-causing organisms, like fungi or bacteria, leading to increased plant damage. 11 дек. 2014 г.
How do nematodes cause harm to plants?
These nematodes cause massive plant tissue necrosis because of their migration and feeding. When they feed from the plant, they simply suck out the plant cell cytoplasm using their stylet, killing the plant cell and moving ahead of the lesion. They make no permanent feeding cells.
How do nematodes cause harm to plants and humans describe?
Root-knot nematodes (RKNs) are significant pests of sweetpotato causing symptoms of infection which include: stunted plant growth, yellowing of leaves, abnormal flower production, and gall production on roots leading to decreased nutrient and water absorption and necrosis and cracking on fleshy storage roots.
How are nematodes harmful to humans?
The real damage occurs when a nematode injects saliva into a cell from its mouth and then sucks out the cell contents. The plant responds to the parasitic worms with swelling, distorted growth, and dead areas. Nematodes can also carry viruses and bacterial diseases inject them into plants.
Can plant nematodes infect humans?
Humans can also be invaded by nematodes. The good news is that these are much smaller than Placentonema! The bad news is that these invaders can cause serious diseases. The nematode Wuchereria bancrofti for example affects over 100 million people throughout tropical parts of the world.
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