Evidence for membrane-mediated control of differentiation during embryogenesis of volvox carteri
نویسندگان
چکیده
منابع مشابه
Control of differentiation in volvox carteri: a model explaining pattern formation during embryogenesis.
The green flagellate J’olvox is a simple muhicellular organism having only two kinds of cells, somatic and reproductive. The cells are arranged on the periphery of a spheroid. Asexual individu~s of I’olvox carten’ are composed of 2000-4000 somatic cells and about 16 large reproductive cells (gonidia), located in the posterior region of the spheroid. Mature asexual spheroids show a very regular ...
متن کاملCarrier-mediated Uptake of Arginine and Urea by Volvox carteri
Volvox carteri f. naganensis takes up arginine via a high affinity, highly specific carrier, whereas carriers for neutral and acidic amino acids cannot be detected (even in nitrogen-starved cultures). Exogenous arginine is accumulated against a steep concentration gradient and is incorporated into protein with high efficiency, but It is not catabolized to any significant extent and will not ser...
متن کاملSulphation-desulphation of a membrane component proposed to be involved in control of differentiation in Volvox carteri.
In the developing asexual embryo of Y&XX carteri the differentiation into somatic and reproductive cells is seen at the division from 32-64 cells. At this stage, 16 cells of the 32celled embryo undergo unequal cleavage, forming 16 large reproductive cells [ 1,2]. In sexual embryos developing under the influence of an inducer the differentiating cleavage is delayed in the male strain up to the f...
متن کاملTranslational control of regA, a key gene controlling cell differentiation in Volvox carteri.
The complete division of labour between the reproductive and somatic cells of the green alga Volvox carteri is controlled by three types of genes. One of these is the regA gene, which controls terminal differentiation of the somatic cells. Here, we examined translational control elements located in the 5' UTR of regA, particularly the eight upstream start codons (AUGs) that have to be bypassed ...
متن کاملSexual Induction in Volvox Carteri
The study of the dependence of reactions on the concentration of various compounds is often of great value in determining reaction mechanisms . In chemical kinetics, it is often found that, according to van't Hoff's rule, the order of dependence of a reaction on the concentration of some compound involved in that reaction is equal to the number of molecules of the compound involved in each reac...
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ژورنال
عنوان ژورنال: FEBS Letters
سال: 1979
ISSN: 0014-5793
DOI: 10.1016/0014-5793(79)80506-2