Abstract:
:We have examined the long-term effects of notochord ablation at chick stages 9-10 on formation of the floor plate and motor neurons. Although missing or reduced 2 days postablation, the floor plate and motor neurons were morphologically normal by 4 postoperative days. When isolated whole or ventral, but not lateral, neural plate fragments from stage 9 embryos were cultured for 4 days in collagen gels, floor plate and neural markers were observed. Our results suggest that floor plate and motor neurons can form in a delayed fashion in vivo after notochord ablation and in vitro from isolated neural plates. This suggests that either there is an early induction of floor plate by the chordamesoderm of Hensen's node, or only limited interactions between the neural plate and notochord immediately after neurulation are required for floor plate determination.
journal_name
Neuronjournal_title
Neuronauthors
Artinger KB,Bronner-Fraser Mdoi
10.1016/0896-6273(93)90227-isubject
Has Abstractpub_date
1993-12-01 00:00:00pages
1147-61issue
6eissn
0896-6273issn
1097-4199pii
0896-6273(93)90227-Ijournal_volume
11pub_type
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