北方劳德藻配子和复大孢子的产生  

PRODUCTION OF GAMETES AND AUXOSPORES IN THE CENTRIC DIATOM LAUDERIA BOREALIS GRAN

作　　者：林均民[1] 翁师德 

机构地区：[1]厦门大学生物学系,厦门361005

出　　处：《海洋与湖沼》1994年第6期601-605,T001,共6页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金!3880038;福建省自然科学基金!C90013

摘　　要：于1986年10月在厦门近岸采集北方劳德藻，从培养中观察其有性生殖和光对生殖的影响。结果表明，该藻只有宽度为26-40μm的细胞能形成配干和复大孢子；在光照条件下每昼夜只发生1次性化；雌雄配子以不同发育方式形成，配子发生呈现一定的时间程序；强光照和16h光周期最适于性化。由此得知，引起性化既依赖适当的细胞大小，又依赖光诱导的外部因素；产生两种精子数目是与精原抱囊的体积大小紧密相关；性化与光强度之间的关系呈正相关；长的或连续的光照性化反应受抑制，而光强度和光周期对性化反应是互补作用。Lauderia borcalis was collected from the Xiamen coast in October in 1986.Observation of the sexual process of this diatom and the effect of light on its rep-roduction showed that only the 24-40μm wide cells can form gametes and auxos-pores. The sexualization may occur only once a day under proper light colldition.Male and female gameles are formed in different development ways and the game-togeny exhibites a certain temporal pattern. High light intensity and 16h were found to be optimal for sexualization. Thus, the induction of sexualization in this diatom depends not only on a suitable cell size but also on light as an external factor.The 32 or 64 sperms produced are related closely to the spermatogonangium volu-me. The sexualization has positive correlation with light intensity, and the sexual reaction is inhibited by long or continuous illumination. Light intensity and photo-period play apparently complementary roles in sexual reaction.

关 键 词：北方劳德藻 有性生殖 配子 复大孢子 光周期 

分 类 号：Q949.271[生物学—植物学]