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Conceptacle

Introduction

In phycology, conceptacles are specialised cavities of seaweeds that contain the reproductive organs. They are situated in the receptacles and open by a small ostiole.[1] The term is used in reference to the Corallinaceae,[2] however they are rarely referred to in any other alga and are one of the major characteristics of the Fucales. There is no haploid phase and therefore no alternation of generations.[3] The thallus is a sporophyte.[4] The diploid plants produce male (antheridia) and female (oogonia) gametangia by meiosis. The gametes are released into the sea, after fusion the zygote settles and begins growth.[5]

There are other similar structures: cryptostomata are similar to conceptacles but differ having only hairs and are sterile.[5] Caecostomata, are found only in Fucus distichus, in these the ostiole becomes blocked during development.[1]

See also

See also

References

References

  1. ↑ 1.0 1.1 Boney, A.D. (1969). A Biology of Marine Algae. Hutchinson Educational Ltd, London
  2. ↑ Irvine, L.M. and Chamberlain, Y.M. (1994). Seaweeds of the British Isles. Volume 1, Part 2B. Natural History Museum, London. ISBN 0 11 3100167
  3. ↑ Fritsch, F.E. (1945). The Structure and Reproduction of the Algae. Vol 2. Cambridge University Press, Cambridge
  4. ↑ Smith, G.M. (1938). Cryptogamic Botany. Algae and Fungi. Second edition, Volume 1, McGraw-Hill Bok Company, Inc.
  5. ↑ 5.0 5.1 Flecher, R.L. (1987). Seaweeds of the British Isles. Volume 3, Part 1. British Museum (Natural History), London. ISBN 0-565-00992-3
Further references

Further references

http://www.mbari.org/staff/conn/botany/browns/Cystoseira/lifehistory.htm Template:Algae-stub Template:Botany-stub