Ic. Delprado et Es. Cardenas, HISTOPATHOLOGY INDUCED BY 2 SPECIES OF ME LOIDODERA (NEMATA, HETERODERINAE) IN CHILE PEPPER AND HAWTHORNE ROOTS, Nematropica, 25(1), 1995, pp. 75-78
Anatomical alterations induced by Meloidodera mexicana and Meloidodera
sp, were studied in roots of chili pepper and hawthorne, respectively
. Swollen females of M. mexicana protruded with tile posterior portion
of the body from the surface of chili pepper roots, whereas Meloidode
ra sp. females remained inside the root tissues of hawthorne. Swollen
females of both species were surrounded by a capsule in collapsed cort
ical parenchyma cells and the shed cuticles of the third and fourth-st
age juveniles. Meloidodera mexicana and Meloidodera sp. fed on stele t
issue which induced the formation of a mononucleate giant cell origina
ting from a vascular parenchyma cell. Giant cells had dense cytoplasm,
numerous vacuoles, and an hypertrophied and amorphous nucleous. Cell
wall thickening was observed near the site of stylet penetration. The
cells near the giant cells induced by Meloidodera sp. exhibited hyperp
lasia.