scholarly journals Phylogenetic patterns of trait and trait plasticity evolution: Insights from amphibian embryos

Evolution ◽  
2018 ◽  
Vol 72 (3) ◽  
pp. 663-678 ◽  
Author(s):  
Rick A. Relyea ◽  
Patrick R. Stephens ◽  
Lisa N. Barrow ◽  
Andrew R. Blaustein ◽  
Paul W. Bradley ◽  
...  
Keyword(s):  
Amphibian Embryos ◽  
Trait Plasticity

scholarly journals “Trait plasticity and tradeoffs shape intraspecific variation in competitive response in a foundation tree species”

2020 ◽  
Author(s):  
Olivia L. Cope ◽  
Richard L. Lindroth ◽  
Andrew Helm ◽  
Ken Keefover‐Ring ◽  
Eric L. Kruger
Keyword(s):  
Intraspecific Variation ◽  
Tree Species ◽  
Competitive Response ◽  
Trait Plasticity

Living organisms influence on environmental conditions: pH modulation by amphibian embryos versus aluminum toxicity

Chemosphere ◽  
2015 ◽  
Vol 139 ◽  
pp. 210-215 ◽  
Author(s):  
Jorge Herkovits ◽  
Luis Alberto Castañaga ◽  
José Luis D’Eramo ◽  
Victoria Platonova Jourani
Keyword(s):  
Environmental Conditions ◽  
Aluminum Toxicity ◽  
Amphibian Embryos ◽  
Living Organisms

scholarly journals The distribution of sodium and potassium in amphibian embryos during early development

1973 ◽  
Vol 232 (2) ◽  
pp. 297-312 ◽  
Author(s):  
Christine Slack ◽  
Anne E. Warner ◽  
R. L. Warren
Keyword(s):  
Early Development ◽  
Amphibian Embryos ◽  
Sodium And Potassium

Fish and Amphibian Embryos — A Model System for Evaluating Teratogenicity

1983 ◽  
Vol 3 (4) ◽  
pp. 237-242 ◽  
Author(s):  
WESLEY J. BIRGE ◽  
JEFFREY A. BLACK ◽  
ALBERT G. WESTERMAN ◽  
BARBARA A. RAMEY
Keyword(s):  
Model System ◽  
Amphibian Embryos

The Effects of β-Mercaptoethanol on the Morphogenetic Movements of Amphibian Embryos

Development ◽  
1963 ◽  
Vol 11 (1) ◽  
pp. 155-166
Author(s):  
P. Malpoix ◽  
J. Quertier ◽  
J. Brachet
Keyword(s):  
Neural Tube ◽  
Tube Formation ◽  
Animal Pole ◽  
Morphogenetic Movements ◽  
Complete Development ◽  
Early Stages ◽  
Amphibian Embryos ◽  
Biological Specificity ◽  
Neural Tube Formation

The inhibition by β-mercaptoethanol of morphogenesis in amphibians, freshwater hydra, planarians and regenerating tadpoles, has already been reported by one of us (Brachet, 1958, 1959a, b, c). The present work provides a closer analysis of the biological specificity of j8-mercaptoethanol with regard to the different movements which produce gastrulation in amphibians: invagination, epiboly, convergent stretching and ingression. The main result, obtained with Pleurodeles, was that gastrulation is completely inhibited by M/100 β-mercaptoethanol. Lower concentrations (M/300) permit more complete development, but the resulting embryos are abnormal. β-Mercaptoethanol interferes with neural tube formation, but has less effect on the development of the notochord and the mesodermal somites. It was further noted that, when embryos are treated at very early stages (1–2 cells, young blastulae), the blastocoele seems to collapse and the ectoblast of the animal pole is deeply puckered.

The influence of lithium on the competence of the ectoderm in Ambystoma mexicanum

Development ◽  
1964 ◽  
Vol 12 (2) ◽  
pp. 317-331
Author(s):  
D. O. E. Gebhardt ◽  
P. D. Nieuwkoop
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Ambystoma Mexicanum ◽  
The Other ◽  
Direct Influence ◽  
Amphibian Embryos ◽  
The Central Nervous System ◽  
The Subject ◽  
Morphogenetic Potential ◽  
Made In

The influence of lithium on the amphibian egg has been the subject of a number of investigations. From the work of Lehmann (1937), Töndury (1938), and Pasteels (1945) it is known that exposure of amphibian embryos to lithium results in a progressive cranio-caudal reduction of the central nervous system and a simultaneous conversion of the presumptive notochord into somites. Whereas these experiments were made with whole embryos, attempts have been made in recent years to localize the lithium effect by transplanting or explanting specific parts of the embryo. Gallera (1949), for instance, concluded from his experiments with transplants containing lithium treated presumptive chorda mesoderm, that lithium had reduced the ‘morphogenetic potential’ of this inductor. Lombard (1952), on the other hand, claimed that the susceptibility of amphibian eggs towards lithium was the result of the ion's direct influence on the ectoderm rather than on the presumptive archenteron roof.

Inversion of the Dorso-ventral Axis in Amphibian Embryos by Unilateral Restriction of Oxygen Supply

Development ◽  
1958 ◽  
Vol 6 (3) ◽  
pp. 486-490
Author(s):  
S. Løvtrup ◽  
A. Pigon
Keyword(s):  
Oxygen Supply ◽  
Nile Blue ◽  
Bilateral Symmetry ◽  
Radial Symmetry ◽  
Point Of View ◽  
Low Permeability ◽  
Grey Crescent ◽  
Protein Coat ◽  
Amphibian Embryos

According to the hypothesis advanced by Løvtrup (1958) the supply of oxygen is one of the factors responsible for the determination of bilateral symmetry in amphibian embryos. The protein coat covering the outside of the egg is known to have a very low permeability (Holtfreter, 1943), and it was suggested in the hypothesis that the formation of the grey crescent consists in a stretching of this coat by which the permeability is increased (cf. the work of Dalcq & Dollander (1948) and of Dollander & Melnotte (1952) on permeability of Nile blue), in this way the radial symmetry of the egg is changed to a bilateral symmetry from a metabolic point of view. As a consequence of the increase in permeability those oxidative, energy-supplying processes which are associated with gastrulation are enabled to proceed at a higher rate at one side of the egg.

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