| 摘要: |
| 应用石蜡切片技术和显微测量法, 对条石鲷心脏的早期发生、分化和形成过程进行了连续观察。结果表明, 在水温(24±1.0) ℃的条件下, 心脏原基在受精后13h 30min 出现于中部脑的腹面, 其外部由卵黄多核层包围, 内部则为扁平细胞所填充; 受精后20h 30min, 心脏开始搏动, 可见血细胞; 初孵仔鱼心脏呈直管状, 位于体腔前端; 2 日龄(days after hatching, DAH), 心脏分化成静脉窦、心耳( 心房) 、心室和动脉球四个部分; 3 日龄, 耳室瓣和半月瓣形成; 6 日龄, 窦耳瓣和心小室形成; 12 日龄, 心脏内血细胞的数量急剧增加, 血流量显著加大; 27 日龄, 心耳内形成小梁结构, 心脏发育完善。 |
| 关键词: 条石鲷, 早期发育, 心脏, 组织学 |
| DOI：10.11693/hyhz201202011011 |
| 分类号: |
| 基金项目:西南大学博士基金项目, SWU111049 号; 中国科学院创新性前沿项目, KSCX2-YW-N-47-08 号; 国家农业科技成果转化资金项目, 05EFN2166000453 号; 青岛市科技发展计划项目, 05-1-HY-79 号。 |
附件 |
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| ONTOGENY OF THE HEART OF ROCK BREAM OPLEGNATHUS FASCIATUS |
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HE Tao1, XIAO Zhi-Zhong2, LIU Qing-Hua2, LI Jun2
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1.College of Animal Science and Technology , Southwest University;2.Institute of Oceanology , Chinese Academy of Sciences
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| Abstract: |
| Based on the histological observation under optical microscope, we studied the ontogeny of the heart of rock bream Oplegnathus fasciatus at (24 ±1.0) ℃. At 13h 30min postfertilization, the heart primordium, an ellipsoidal tube de-rived from the mesoderm, appears in the ventral side of the midbrain. It consists of I-YSL exteriorly and a stuff of spindle cells interiorly. At 20h 30min post-fertilization, the heart is beginning to beat and the blood starts to circulate through a closed set of channels. At hatching, the heart appeared as a straight tube lying anterior to the coelom of rock bream. At 2 DAH (days after hatching), the heart was differentiated into four parts: sinous venosus, atrium, ventricle and bulbous arte-riosus. At 3 DAH, the atrioventricular and semilunar valves were formed. At 6 DAH, the sinoatial valve was developed and the trabeculae in the ventricle appeared. At 12 DAH, the blood cells in the heart increased sharply. At 27 DAH, the trabe-culae were appeared in the atrium, and the heart of rock bream was developed completely. |
| Key words: Rock bream Oplegnathus fasciatus, Ontogeny, Heart, Histology |
