Asymmetric waveforms in echinoderm sperm flagella.
Asymmetric waveforms in echinoderm sperm flagella.
复制标题
棘皮动物精子鞭毛的不对称波形。
DOI：
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发表时间：
1977
影响因子：
2.8
通讯作者：
S. F. Goldstein
中科院分区：
文献类型：
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作者：
S. F. Goldstein
1.对一些棘皮动物活精子的暗场多次曝光照片进行了分析。2.弯曲在基部成对发展，就像它们在鞭毛中具有对称的波形一样。然而，这些弯曲的角度并不抵消，因此微管滑动-高达超过50%的与弯曲传播相关的滑动-被转移到远端。这种滑动意味着（a）微管在直的区域内不是刚性交联的，和（B）弯曲可以正常传播，尽管有明显的外部微管滑动。3.精子头部和波形的不对称性似乎都影响精子的游动路径。
1.Dark-field, multiple-exposure photographs of live spermatozoa of a number of echinoderms were analysed. 2. Bends develop at the base in pairs, as they do in flagella with symmetrical waveforms. However, the angles of these bends do not cancel, so that microtubular sliding-of up to over 50% of that associated with bend propagation-is transferred distally. This sliding implies that (a) microtubules are not rigidly cross-linked within straight regions, and (b) bends can propagate normally in spite of appreciable extrinsic microtubular sliding. 3. Both the sperm head and the asymmetry of the waveform appear to affect the swim path of a spermatozoon.