ENVIRONMENTAL FACTORS AND SEXUAL EXPRESSION INCHLOROCOCCUM ECHINOZYGOTUM(CHLOROPHYCEAE)1
作者:
Joseph C. O'Kelley,
期刊:
Journal of Phycology
(WILEY Available online 1983)
卷期:
Volume 19,
issue 1
页码: 57-64
ISSN:0022-3646
年代: 1983
DOI:10.1111/j.0022-3646.1983.00057.x
出版商: Blackwell Publishing Ltd
关键词: sexual expression;zygospore production;nitrogen;glutamine;glutamine synthetase;Chlorococcum echinozygotum
数据来源: WILEY
摘要:
ABSTRACTSeveral environmental factors affected total growth and zygospore production inChlorococcum echinozygotumStarr. The temperature range at which zygospore production occurred was more restricted than the range that supported vegetative growth. Light intensity had little effect upon zygospore formation: gamete production and gamete pairing occurred in darkness. Zygospore production occurred over a wide pH range; bicarbonate had a minor effect upon zygospore formation. Nitrogen concentration was the factor of primary importance. As the level of nitrogen supplied as nitrate, ammonia, urea and asparagine in the medium was increased, zygospore production first increased (over no nitrogen) at low levels and then decreased at high levels. All levels of glutamine supplied reduced zygospore production. A possible way in which nitrogen concentration in the medium and sexual expression are linked is discussed.
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