2004
DOI: 10.1002/jmor.10301
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Ultrastructure of poison glands of South American frogs: A comparison betweenPhysalaemus albonotatus andLeptodactylus chaquensis (Anura: Leptodactylidae)

Abstract: Serous (poison) cutaneous glands of the leptodactylid species Physalaemus albonotatus and Leptodactylus chaquensis were compared using light and transmission electron microscopy. Glands in the two species share structural traits common in anurans, including the peripheral contractile sheath (myoepithelium) and the syncytial secretory unit that produces, stores, and modifies the poison. At the ultrastructural level, early steps of poison production are also similar and fit the usual path of proteosynthesis, inv… Show more

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Cited by 19 publications
(24 citation statements)
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“…Granule morphology of LSGs varies greatly, as has previously been reported for serous glands of other anuran species, e.g., Physalaemus biligonigerus (Delfino et al. 1999, 2001), P. albonotatus and Leptodactylus chaquensis (Alvarez et al. 2005), and Rhinella icterica (Almeida et al.…”
Section: Discussionmentioning
confidence: 52%
“…Granule morphology of LSGs varies greatly, as has previously been reported for serous glands of other anuran species, e.g., Physalaemus biligonigerus (Delfino et al. 1999, 2001), P. albonotatus and Leptodactylus chaquensis (Alvarez et al. 2005), and Rhinella icterica (Almeida et al.…”
Section: Discussionmentioning
confidence: 52%
“…Such high degree of osmiophilic reaction has been used in electron microscopy of plant cells to localize alkaloids that are associated with lipid inclusions. Such osmiophilia has been noted in the poison glands of skin of dart‐poison frogs as well, where alkaloid toxins have been definitively documented. The putative association of toxic alkaloids with the MGBs indicates the active sequestration of the toxins into secretory organelles (LB homologues) rather than a passive accumulation into all lipid domains of epithelial cells.…”
Section: Resultsmentioning
confidence: 93%
“…(1999) for P. biligonigerus . Also, secretory products of ordinary serous glands of P. albonotatus and P. biligonigerus share similar ultrastructural traits in maturation paths (Delfino et al., 1999; Alvarez et al., 2005). Ron et al.…”
Section: Discussionmentioning
confidence: 96%