MATURATION OF ALGAL ZYGOTES

ALTERNATIVE EXPERIMENTAL APPROACHES FOR CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)

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Abstract

Young zygotes from crosses of Chlamydomonas reinhardtii Dang. mutant and wild‐type strains were incubated, in the presence or absence of light and/or nitrogen to determine whether continuation of conditions inducing gamete formation permits zygospore formation without loss of viability. Different culture media, continuous illumination vs. dark incubation and various durations of the maturation period were tested, for effect on zygospore germination efficiency, zygospore “burst size” and zoospore viability. Following either the routine maturation procedure of dark incubation on standard minimal medium, or following a new procedure of incubation under continuous illumination on N‐free medium, zygospore formation can be ensured and high germination efficiencies obtained within 3 days after mating. Tetrad analysis indicates meiosis occurs normally whether zygotes have been matured in the presence or absence of light or nitrogen. Preliminary data suggest an effect of increased maturation time on the transmission of cytoplasmic genes, if a N‐free continuous illumination maturation protocol is followed. Two experimental approaches for the maturation of C. reinhardtii zygotes are suggested and advantages of each are discussed.

Original languageEnglish (US)
Pages (from-to)225-231
Number of pages7
JournalJournal of Phycology
Volume13
Issue number3
DOIs
StatePublished - 1977
Externally publishedYes

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Chlorophyceae
Chlamydomonas reinhardtii
zygote
maturation
lighting
incubation
viability
germination
zoospores
nitrogen
meiosis
gamete
germ cells
culture media
mutants
duration
zygospores
gene
genes

Keywords

  • Chlamydomonas
  • germination, zygote
  • maturation, zygote
  • nitrogen
  • zoospore
  • zygospore
  • zygote

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

Cite this

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title = "MATURATION OF ALGAL ZYGOTES: ALTERNATIVE EXPERIMENTAL APPROACHES FOR CHLAMYDOMONAS REINHARDTII (CHLOROPHYCEAE)",
abstract = "Young zygotes from crosses of Chlamydomonas reinhardtii Dang. mutant and wild‐type strains were incubated, in the presence or absence of light and/or nitrogen to determine whether continuation of conditions inducing gamete formation permits zygospore formation without loss of viability. Different culture media, continuous illumination vs. dark incubation and various durations of the maturation period were tested, for effect on zygospore germination efficiency, zygospore “burst size” and zoospore viability. Following either the routine maturation procedure of dark incubation on standard minimal medium, or following a new procedure of incubation under continuous illumination on N‐free medium, zygospore formation can be ensured and high germination efficiencies obtained within 3 days after mating. Tetrad analysis indicates meiosis occurs normally whether zygotes have been matured in the presence or absence of light or nitrogen. Preliminary data suggest an effect of increased maturation time on the transmission of cytoplasmic genes, if a N‐free continuous illumination maturation protocol is followed. Two experimental approaches for the maturation of C. reinhardtii zygotes are suggested and advantages of each are discussed.",
keywords = "Chlamydomonas, germination, zygote, maturation, zygote, nitrogen, zoospore, zygospore, zygote",
author = "VanWinkle-Swift, {Karen P}",
year = "1977",
doi = "10.1111/j.1529-8817.1977.tb02920.x",
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journal = "Journal of Phycology",
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PY - 1977

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N2 - Young zygotes from crosses of Chlamydomonas reinhardtii Dang. mutant and wild‐type strains were incubated, in the presence or absence of light and/or nitrogen to determine whether continuation of conditions inducing gamete formation permits zygospore formation without loss of viability. Different culture media, continuous illumination vs. dark incubation and various durations of the maturation period were tested, for effect on zygospore germination efficiency, zygospore “burst size” and zoospore viability. Following either the routine maturation procedure of dark incubation on standard minimal medium, or following a new procedure of incubation under continuous illumination on N‐free medium, zygospore formation can be ensured and high germination efficiencies obtained within 3 days after mating. Tetrad analysis indicates meiosis occurs normally whether zygotes have been matured in the presence or absence of light or nitrogen. Preliminary data suggest an effect of increased maturation time on the transmission of cytoplasmic genes, if a N‐free continuous illumination maturation protocol is followed. Two experimental approaches for the maturation of C. reinhardtii zygotes are suggested and advantages of each are discussed.

AB - Young zygotes from crosses of Chlamydomonas reinhardtii Dang. mutant and wild‐type strains were incubated, in the presence or absence of light and/or nitrogen to determine whether continuation of conditions inducing gamete formation permits zygospore formation without loss of viability. Different culture media, continuous illumination vs. dark incubation and various durations of the maturation period were tested, for effect on zygospore germination efficiency, zygospore “burst size” and zoospore viability. Following either the routine maturation procedure of dark incubation on standard minimal medium, or following a new procedure of incubation under continuous illumination on N‐free medium, zygospore formation can be ensured and high germination efficiencies obtained within 3 days after mating. Tetrad analysis indicates meiosis occurs normally whether zygotes have been matured in the presence or absence of light or nitrogen. Preliminary data suggest an effect of increased maturation time on the transmission of cytoplasmic genes, if a N‐free continuous illumination maturation protocol is followed. Two experimental approaches for the maturation of C. reinhardtii zygotes are suggested and advantages of each are discussed.

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