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李夜光, 胡鸿钧. 卡氏膜球藻鞭毛伸缩节律的研究[J]. 植物科学学报, 1994, 12(4): 355-359.
引用本文: 李夜光, 胡鸿钧. 卡氏膜球藻鞭毛伸缩节律的研究[J]. 植物科学学报, 1994, 12(4): 355-359.
Li Yeguang, Hu Hongjun. STUDIES ON THE RHYTHM OF FLAGELLAR STRETCH AND WITHDRAWAL OF HYMENOMONAS CARTERAE[J]. Plant Science Journal, 1994, 12(4): 355-359.
Citation: Li Yeguang, Hu Hongjun. STUDIES ON THE RHYTHM OF FLAGELLAR STRETCH AND WITHDRAWAL OF HYMENOMONAS CARTERAE[J]. Plant Science Journal, 1994, 12(4): 355-359.

卡氏膜球藻鞭毛伸缩节律的研究

STUDIES ON THE RHYTHM OF FLAGELLAR STRETCH AND WITHDRAWAL OF HYMENOMONAS CARTERAE

  • 摘要: 卡氏膜球藻(Hymenomonascarterae)是一种单细胞海藻,细胞圆球形,表面覆盖一层球形石(Coccoliths).两条鞭毛稍不等长,着生于细胞前端,鞭毛长约为细胞直径的1.5倍。在25±℃,光照强度2000 lx,光暗时间比14:10小时条件下,用MESⅢ培养基培养卡氏膜球藻,发现细胞在光照条件下伸出鞭毛,活跃游动;在黑暗条件下缩回鞭毛,沉于培养瓶底。进一步试验证明:1.光刺激细胞伸出鞭毛,黑暗刺激细胞缩回鞭毛。2.鞭毛的伸缩与培养中的光暗周期变化严格对应,即光周期开始后20分钟,细胞开始伸出鞭毛;暗周期一开始,鞭毛就向细胞内收缩。3.在连续光照条件下,鞭毛的周期性伸缩现象消失。所以,卡氏膜球藻鞭毛周期性伸缩是一种受光暗周期调节的外源节律。这种鞭毛伸缩的节律现象在藻类是第一次报道。

     

    Abstract: Hymenomonas carterae is an unicellular marine alga,which is spheroid and is covered with one layer of coccoliths;two flagella are slightly different in length and attach to the front end of the cell.The length of the flagella is about 1.5 times as the cell diameter.When the cells are cultured in MES Ⅲ medium,under temperature 25±1℃,light intersity 2000 lx,light dark period 14:10(L:D)hours,it was found that the cells swim actively with their flagella in nomal length in the light and sink to the bottom with their flagella withdrawn into cells in the dark period.Further experiments reveal:1.Light stimulates the flagella to stretch and dark stimulates the flagella to withdraw.2.Flagellar stretch and withdrawal correspond strictly with the light-dark cycle.Flagella stretch out 20 minutes after the beginning of light period and withdraw after the beginning of dark period.3.The phenomenon of cyclically flagellar stretch and withdrawal disappears under continuous light,Obviously,the cyclically flagellar stretch and withdrawal of Hymenomonas cartearis is a kind of exogenous rhythm which is regulated by the light-dark cycle,the rhythm of algal flagellar stretch and withdrawal is reported for the first time.

     

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