By Sigrid Berger (auth.), Hans-Jürg Marthy (eds.)
The NATO complicated research Institute on "Experimental Embryology in Aquatic Plant and Animal Organisms" was once attended by way of greater than 70 contributors, together with 15 invited major teachers from 18 assorted international locations. in line with the most objective of the assembly, senior scientists, postdoctoral investigators and graduate scholars operating in parts of descriptive and experimental embryology, classical, molecular and developmental biology, body structure and biochemistry and so on. , have been introduced jointly for 2 weeks as a group with a powerful universal curiosity in "development"; that's, the a number of phenomena and mechanisms, in molecular, mobile, genetic and organismic phrases, saw within the improvement of aquatic organisms. preliminary obstacle that the nice number of organic versions in addition to of study matters may damage the clinical caliber and coherency of the path was once pointless. It used to be precisely this breadth which made the Institute important for every of the members. considering the various "students" have been more youthful scientists beginning a occupation, it used to be the most objective of the path to supply a concise evaluation of chosen approach versions of essentially aquatic organisms and to provide and talk about examine performed some time past and in development. hence, every one major speaker gave in-depth lectures: one during which he provided an summary of "his" version and one other facing present investigations.
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Extra info for Experimental Embryology in Aquatic Plants and Animals
Example text
Rhodomorphin activity was identified initially as a glycoprotein because of its ability to bind specifically to the lectin Con A. Using a Con A affinity column, Watson and Waaland (1983) purified rhodomorphin activity about 40-fold. This activity was sensitive to proteinase, inactivated by short treatments at 50°C, and was associated with a macromolecule with a molecular weight of about 14kD after gel filtration. 46 Further purification by Watson and Waaland (1986) indicated that the glycosidic moiety had terminal alpha-D-mannosyl residues and that disulfide bridges were required for activity to be recovered after denaturation by SDS PAGE.
Polysaccharide granules. If granules are present, they are very small. The chloroplasts in the rest of the rhizoid are usually spherical, have only a few internal membranes, and are nearly filled with polysaccharides. Not all of the numerous chloroplasts of an Acetabular ia cell contain DNA (Ltittke, 1981). A higher percentage of apical chloroplasts contain DNA than do the middle ones. Most of the chloroplasts of the rhizoid that are not in the vicinity of the nucleus are devoid of DNA while those close to the nucleus contain DNA.
Cells in the posterior divided to form only somatic initials. Differentiation of the somatic and gonidial cells occurred later under the appropriate cultural conditions (Kirk, 1988). Male and female asexual spheroids were indistinguishable from each other, but when exposed to a potent, species-specific pheromone or sexual inducer, the subsequent round of asexual development was modified so that the asymmetric divisions gave rise to sperm packets or eggs rather than gonidia. The sexual inducer of Vol vox is one of the most potent morphogens known, i.