UNUSUAL REPRODUCTIVE STRUCTURES IN SYRINGODERMA ABYSSICOLA (S. & G.) LEVRING*

@article{Walker1978UNUSUALRS,
  title={UNUSUAL REPRODUCTIVE STRUCTURES IN SYRINGODERMA ABYSSICOLA (S. \& G.) LEVRING*},
  author={David C. Walker and Eric Charles Henry},
  journal={New Phytologist},
  year={1978},
  volume={80},
  pages={193-197}
}
SUMMARY Reproductive structures of Syringoderma abyssicola (S. & G.) Levring are unique. They begin development as normal unilocular sporangia. However, the initial products of cytokinesis develop a cell wall, but not as in plurilocular sporangia. Some of these walled cells may in turn divide to produce a tetrad of naked flagellate cells. This is in contrast to other members of the Dictyotales, the order in which S. abyssicola is currently placed. 
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References

SHOWING 1-10 OF 10 REFERENCES
Culture studies of Pacific coast Phaeophyceae
TLDR
Syringoderma abyssicola, the little known type species of an apparently dictyotalean genus, is reported on after field and culture observations, and may be better placed in the Sphacelariales than with the Dictyotales. Expand
Ultrastructural characteristics of the vegetative cell of Smithora naiadum (Rhodophyta)
Abstract Many organelles in the vegetative cell of the marine red alga Smithora naiadum (Bangiophycidae) were found to be similar to those reported in other members of the Rhodophyta. However,Expand
STRUCTURE AND DEVELOPMENT OF ZONARIA FARLOWII
TLDR
The present investigation is based on Z. Farlowii S. and G., which grows abundantly along the coast of southern California in the vicinity of Laguna Beach, which is of particular interest because of the peculiarity of certain features of its morphology. Expand
PLANT MICROTECHNIQUE: SOME PRINCIPLES AND NEW METHODS
TLDR
A method of fixation in acrolein and embedding in glycol methacrylate polymer is described in detail and in a wide range of plant specimens prepared in this way, stained sections 1-3 microns thick showed excellent preservation of tissue and cell structures. Expand
A low-viscosity epoxy resin embedding medium for electron microscopy.
  • A. Spurr
  • Materials Science, Medicine
  • Journal of ultrastructure research
  • 1969
TLDR
A low-viscosity embedding medium based on ERL-4206 is recommended for use in electron microscopy and has a long pot life of several days and infiltrates readily because of its low viscosity. Expand