Structure of reproductive apparatus of Gracilaria/ Gracilariopsis lemaneiformis (Gracilariaceae, Rhodophyta) |
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Authors: | XU Di ZHU JianYi HE Yang CHENG XiaoJie ZHANG WenYan & ZHANG XueCheng |
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Institution: | (1) College of Life Sciences, Ocean University of China, Qingdao, 266003, China;(2) Department of Biology, Changshu Institute of Technology, Changshu, 215500, China |
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Abstract: | Reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis collected from Qingdao city were studied with a light and a transmission electron microscope. The special superficial arrangement
of spermatangium for this species was clearly observed, and the ultrastructure of spermatangial development revealed the similar
cytodynamic pattern followed by all the Gracilariaceae members developed from spermatangial mother cells to spermatangium.
The female reproductive apparatus before fertilization was also observed and trichogyne was found protruding above the cortex,
contrary to the earlier reports. Tetrasporangium was formed by an outer cortical cell and the tetraspores became spherical
and expended after being released.
Supported by the National Natural Sciences Foundation of China (Grant No. 40606034) and the National High-Tech Research and
Development Program of China (Grant No. 2006AA10A413) |
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Keywords: | Gracilaria/Gracilariopsis lemaneiformis ultrastructure reproductive apparatus |
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