منابع مشابه
Tail 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 کاملBrachyury 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 کاملNotochord Morphogenesis: A Prickly Subject for Ascidians
Orchestrated cell movements marshalled by proper cell polarity in the developing body axes are fundamental to the elongation of the notochord during chordate embryogenesis. A recent study shows that, in ascidians, the planar cell polarity gene prickle regulates sequential establishment of cell polarity during two phases of notochord morphogenesis.
متن کاملNodal and FGF coordinate ascidian neural tube morphogenesis.
Formation of the vertebrate neural tube represents one of the premier examples of morphogenesis in animal development. Here, we investigate this process in the simple chordate Ciona intestinalis Previous studies have implicated Nodal and FGF signals in the specification of lateral and ventral neural progenitors. We show that these signals also control the detailed cellular behaviors underlying ...
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ژورنال
عنوان ژورنال: Developmental Dynamics
سال: 2007
ISSN: 1058-8388,1097-0177
DOI: 10.1002/dvdy.21184