Premium
Formation of the pronephros and pronephric duct rudiment in the Mexican axolotl
Author(s) -
Gillespie Laura L.,
Armstrong John B.
Publication year - 1985
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051850207
Subject(s) - pronephros , somite , biology , axolotl , intermediate mesoderm , anatomy , lateral plate mesoderm , mesoderm , duct (anatomy) , ambystoma mexicanum , paraxial mesoderm , microbiology and biotechnology , embryo , embryogenesis , gastrulation , regeneration (biology) , xenopus , genetics , embryonic stem cell , gene
In the Mexican axolotl ( Ambystoma mexicanum ), the pronephros begins to form at the four‐somite stage. It is initially continuous with the posterior‐lateral region of somite 2 and the lateral margin of somites 3 and 4. By the seven‐somite stage, the pronephros has become compacted, and the cells are now morphologically distinct from the somitic cells. At this stage, a mass of loosely connected cells, apparently originating from the lateral mesoderm, is seen below somites 4 and 5. By the eight‐somite stage, these presumptive duct cells have migrated dorsally to the duct path and are found below somites 5–7. By the nine‐somite stage they have begun to migrate caudally.