ON THE PHYSIOLOGY OF FEEDING BY THE ROOT-KNOT NEMATODE
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
A gall is formed not as a result of the influence of the basic growth hormones which originate in the plant itself, but either under the influence of the toxins excreted by the nematode or, more preferably, of the products of the interaction of the nematode with the plant. These toxins also change the normal growth processes. It is known 8 that several amino acids stimulate the pathological growth of meristem. It is possible also that the liberation of amino acids by the nematodes is a reason for the growth of galls. The growth of meristem takes place in the plant in the paths of descending currents which carry the products of synthesis. In as much as in the gall the normal growth processes are suspended, then the incoming nutritive substances are not fully utilized by the plant which allows the development of the nematode. On the other hand, the gall may be considered the plants protective barrier against the action of the nematode.
- Anatomy and Physiology