Chemoreception in Nematodes

Bazzicalupo, Paolo; Riso, Laura De; Maimone, Francesco; Ristoratore, Filomena; Sebastiano, Marisa

doi:10.1007/978-1-4757-9080-1_21

Cited by 5 publications

(2 citation statements)

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“…The sensitivity to other repellents such as garlic may be less dependent on the shape of the channel and rely more directly on specific receptors. Thus it would not usually be lost in Dyf mutants (Bazzicalupo et al, 1994). The increased variability of the avoidance responses of dyf-I worms also agrees with this iaterpretatien.…”

Section: Discussionsupporting

confidence: 58%

“…In our laboratory we screened directly for lack of staining, and chose only mutants in which none of the amphid cells, that normally do, would stain. All our Dyf mutants show some chemoreception defect, especially in the avoidance response to repellents, but are normal for sensitivity to light touch (Bazzicalupo et al, 1994). Dyf alleles, all showing some chemoreception defect, have so far been identified in more than 20 genes with about half of them falling into genes previously identified on the basis of altered behavior: osm, che, and daf .…”

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confidence: 98%

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Amphid defective mutant ofCaenorhabditis elegans

et al. 1994

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Studies are reported on a chemoreception mutant which arose in a mutator strain. The mutant sensory neurons do not stain with fluoresceine isothiocyanate (Dyf phenotype), hence the name, dyf-1, given to the gene it identifies. The gene maps on LGI, 0.4 map units from dpy-5 on the unc-11 side. The response of mutant worms to various repellents has been studied and shown to be partially altered. Other chemoreception based behaviors are less affected. The cilia of the sensory neurons of the amphid are shorter than normal and the primary defect may be in the capacity of the sheath cells to secrete the matrix material that fills the space between cilia in the amphid channel. Progress toward the molecular cloning of the gene is also reported. Relevant results from other laboratories are briefly reviewed.

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Section: Discussionsupporting

confidence: 58%

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confidence: 98%