| histopathology and host range studies of the redwood nematode rhizonema sequoiae. | second-stage larvae of rehizonma sequoiae cid del prado vera et al. tunnel through the cortex of the redwood sequoia sempervirens (d. don) endl. root to the vascular tissue where each developing female induces a single ovoid or occasionally spherical giant cell with a single ovoid to spherical nucleus containing one to four enlarged nucleoli. nematode tunnels are filled with a gel material and often contain second-stage larvae and males. there is tissue necrosis around females, and cortical tiss ... | 1984 | 19295877 |
| fine structure of body wall cuticle of females of eight genera of heteroderidae. | body wall cuticle of adult females of eight genera within the heteroderidae was examined by transmission electron microscopy for comparison with previously studied species within the family. cuticle structure was used to test some current hypotheses of phylogeny of heteroderidae and to evaluate intrageneric variability in cuticle layering. verutus, rhizonema, and meloidodera possess striated cuticle surfaces and have the simplest layering, suggesting that striations have not necessarily arisen r ... | 1985 | 19294096 |
| postembryonic development of the redwood nematode, rhizonema sequoiae (nemata: heteroderidae). | second-stage larvae of rhizonema sequoiae cid del prado vera et al. developed into adult females in 6 months or adult males in 3 - 4 months on roots of sequoia sempervirens maintained in a growth chamber at 16 c with a 12-hour light period. under these conditions the second-stage larvae increased in diameter, the central cells of the genital primordium increased in size, and their nuclei enlarged. mesenchymal cells accumulated in the esophageal and tail regions. second-stage larvae become third- ... | 1984 | 19295878 |
| rhizonema sequoiae n.gen. n.sp. from coast redwood sequoia sempervirens (d.don) endl. | rhizonema sequoiae n.gen, u. sp. is described from the roots of coast redwood, sequoia sempervirens (d. don) endl., growing near lake lagunitas, marin county, california. rhizonema females are annulated over their entire bodies, are wholly embedded in host tissue, and secrete an abundant amount of gel material. mature females do not form a cyst. the vulva is located on a large posterior terminal cone, and the anus is on the dorsal vulval lip. esophageal glands of the second-stage larvae fill mor ... | 1983 | 19295834 |