منابع مشابه
Brachyury downstream notochord differentiation in the ascidian embryo.
The ascidian tadpole represents the most simplified chordate body plan. It contains a notochord composed of just 40 cells, but as in vertebrates Brachyury is essential for notochord differentiation. Here, we show that the misexpression of the Brachyury gene (Ci-Bra) of Ciona intestinalis is sufficient to transform endoderm into notochord. Subtractive hybridization screens were conducted to iden...
متن کاملFormation of the notochord in living ascidian embryos.
The dynamic behaviour of cells during formation of the notochord in the ascidian, Ciona intestinalis, was examined by means of Differential Interference Contrast (DIC) microscopy and time-lapse videorecording. The initial rudiment is formed in part as a consequence of the pattern of mitotic divisions as the blastopore shifts posteriorly. Vertical and horizontal rearrangements produce an elongat...
متن کاملMutations affecting tail and notochord development in the ascidian Ciona savignyi.
Ascidians are among the most distant chordate relatives of the vertebrates. However, ascidians share many features with vertebrates including a notochord and hollow dorsal nerve cord. A screen for N-ethyl-N-nitrosourea (ENU)-induced mutations affecting early development in the ascidian Ciona savignyi resulted in the isolation of a number of mutants including the complementing notochord mutants ...
متن کاملTail morphogenesis in the ascidian, Ciona intestinalis, requires cooperation between notochord and muscle.
We present evidence that notochord and muscle differentiation are crucial for morphogenesis of the ascidian tail. We developed a novel approach for embryological manipulation of the developing larval tissues using a simple method to introduce DNA into Ciona intestinalis and the several available tissue-specific promoters. With such promoters, we misexpressed the Xenopus homeobox gene bix in not...
متن کاملSynergistic action of HNF-3 and Brachyury in the notochord differentiation of ascidian embryos.
In vertebrate embryos, the class I subtype forkhead domain gene HNF-3 is essential for the formation of the endoderm, notochord and overlying ventral neural tube. In ascidian embryos, Brachyury is involved in the formation of the notochord. Although the results of previous studies imply a role of HNF-3 in notochord differentiation in ascidian embryos, no experiments have been carried out to add...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 2019
ISSN: 0012-1606
DOI: 10.1016/j.ydbio.2018.11.009