Physiological Gradients in Development — A Possible Role for Messenger Ribonucleoprotein

Wall, Robert J.

doi:10.1016/b978-0-12-028610-2.50006-x

Cited by 7 publications

(1 citation statement)

References 333 publications

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“…Also, the importance of the regional differences in physiological gradients (27) and of polarity (16) has been discussed extensively. Recently, a number of papers have appeared that have reported the unequal distribution of RNAs, especially mRNA (6,7,8,20) and proteins (14,19) in oocytes, eggs and the developing embryos of amphibians.…”

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confidence: 99%

Protein synthesis in dorsal, ventral, animal and vegetal half-embryos of Xenopus laevis isolated at the 8-cell stage.

Shiokawa¹,

Saito

Kageura³

et al. 1984

Cell Struct. Funct.

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ABSTRACT. Dorsal, ventral, animal and vegetal half-embryos of Xenopus laevis were isolated at the 8-cell stage, and their synthesis of protein examined during 12 h of culture. The kinetics of the uptake and incorporation of [35S]-methionine did not differ greatly among the four kinds of half-embryos. Two-dimensional gel electrophoreses showed that there were no detectable differences in the pattern of protein synthesis for the four types of half-embryos, at least during the first 6 h of culture which covered the period from the cleavage to late blastula stage. The patterns, however, changed greatly, especially between those of the animal and vegetal half-embryos, during the latter 6 h of culture which covered the period from the early gastrula to early neurula stage.These results are evidence that equal qualitative and quantitative maternal mRNA-dependent protein synthesis takes place in the four types of embryonic regions, including the vegetal half-embryos, although later in the post-blastular stages, syntheses of region-specific proteins start that are dependent on new genome expression.

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mentioning

confidence: 99%

Protein synthesis in dorsal, ventral, animal and vegetal half-embryos of Xenopus laevis isolated at the 8-cell stage.

Shiokawa¹,

Saito

Kageura³

et al. 1984

Cell Struct. Funct.

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Cellular Coordination in Embryogenesis: Some Theoretical Considerations

Matthews

1977

Lecture Notes in Biomathematics

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Transition from polar to duplicate patterns

Erneux

Hiernaux

1980

J. Math. Biology

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The existence of symmetric nonuniform solutions in nonlinear reaction-diffusion systems is examined. In the first part of the paper, we establish systematically the bifurcation diagram of small amplitude solutions in the vicinity of the two first bifurcation points. It is shown that: i)The system can adopt a stable symmetric solution (basic wave number 2) if the value of the bifurcation parameter is changed or if the initial polar structure (basic wave number 1) is sufficiently perturbed. ii) This behavior is independent of the particular reaction-diffusion model proposed and of the number of intermediate components (greater than or equal to 2) involved. In the second part of the paper, analogies are established between the possibilities offered by the bifurcation diagrams, involving only the two first primary branches, the observation that in the early development of different organisms, appropraite experimental manipulations may switch the normal (polar) developmental pattern to a duplicate structure.

show abstract

Physiological Gradients in Development — A Possible Role for Messenger Ribonucleoprotein

Cited by 7 publications

References 333 publications

Protein synthesis in dorsal, ventral, animal and vegetal half-embryos of Xenopus laevis isolated at the 8-cell stage.

Protein synthesis in dorsal, ventral, animal and vegetal half-embryos of Xenopus laevis isolated at the 8-cell stage.

Cellular Coordination in Embryogenesis: Some Theoretical Considerations

Transition from polar to duplicate patterns

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