FLAGELLAR PHOTORESPONSES OF CHLAMYDOMONAS CELLS HELD ON MICROPIPETTES .2. CHANGE IN FLAGELLAR BEAT PATTERN
FLAGELLAR PHOTORESPONSES OF CHLAMYDOMONAS CELLS HELD ON MICROPIPETTES .2. CHANGE IN FLAGELLAR BEAT PATTERN
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DOI：
10.1002/cm.970180404
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发表时间：
1991-01-01
影响因子：
--
通讯作者：
NULTSCH, W
中科院分区：
文献类型：
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作者：
RUFFER, U;NULTSCH, W
在对蓝光或白色光的递增和递减刺激下，衣原体的两个鞭毛都出现了搏动模式的变化。 前振幅在两鞭毛中或增大或减小，总是相反。 同样，发现升压和降压响应的两种相反组合大致平行于两种类型的拍频变化。 结果表明，第一种类型（称为（+）型）可能具有正趋光性，第二种类型（称为（-）型）可能具有负趋光性。 比较测量表明，频率不仅与鞭毛运动的速率有关，而且与节拍模式有关。 在恢复和有效划水过程中，运动速率可能以不同的方式变化。 虽然两种类型的鞭毛的搏动频率和模式变化是相反的，但在有效冲程期间，两种鞭毛的运动速率并不总是相同的。 在（-）型中，发现有效中风运动率的不同变化，可能表明涉及额外的机制。
In response to step-up as well as step-down blue or white light stimuli, changes of beat pattern were observed in the two flagella of Chlamydomonas. The front amplitude was either increased or decreased, always in reverse in the two flagella. Again, two opposite combinations of step-up and step-down responses were found roughly in parallel to the two types of beat frequency changes. It is shown that positive phototaxis is probably achieved by the first type [called type (+)] and negative phototaxis by the second one [called type (-)]. Comparative measurements have revealed that frequency is not only related to the rate of flagellar movement, but also to the beat pattern. The rate of movement may change in different ways in the recovery and in the effective stroke. Though beat frequency and pattern changes are opposite in the two types, the rates of movement of the two flagella during the effective stroke are not always. In type (-) divergent changes were found in the rates of effective stroke movement, perhaps indicating the involvement of an additional mechanism.