Nuclear Transition Between the Conjunction Cells of Phaeodactylum tricornutum Bohlin (Bacillariophyta)  

作　　者：LI Si PAN Kehou ZHU Baohua ZHANG Lin 

机构地区：[1]Key Laboratory of Marine Genetics and Breeding of Chinese Min&try of Education,Ocean University of China,Qingdao 266003,P.R.China [2]Key Laboratory of Mariculture of Chinese Ministry of Education,Ocean University of China,Qingdao 266003,P.R.China

出　　处：《Journal of Ocean University of China》2012年第3期383-388,共6页中国海洋大学学报（英文版）

基　　金：supported by the State Basic Research and Development Program of China (973 Program) (2011-CB200901);the Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province(BS2010SW037);the Opening Research Project of Experimental Marine Biology Laboratory,Institute of Oceanology,Chinese Academy of Sciences

摘　　要：Phaeodactylum tricornutum is one of the important marine diatoms for oceanic primary production. Its reproduction has profound significance in the life cycle; however, the nuclear behavior during its sexual reproduction was not clear. In this study, we observed the nuclear transition and determined its correlation with cell conjunction. It was found that two cells jointed at their apices first and swung and aligned each other immediately, and nucleus from one cell was able to transfer into another one during cell conjugation. The cell pairs conjugated for nuclear transition were different from those formed in mitosis in hypovalve thickness and cellular arrangement. Our findings proved the existence of sexual reproduction in P. tricornutum.Phaeodactylum tricornutum is one of the important marine diatoms for oceanic primary production. Its reproduction has profound significance in the life cycle; however, the nuclear behavior during its sexual reproduction was not clear. In this study, we observed the nuclear transition and determined its correlation with cell conjunction. It was found that two cells jointed at their apices first and swung and aligned each other immediately, and nucleus from one cell was able to transfer into another one during cell conjugation. The cell pairs conjugated for nuclear transition were different from those formed in mitosis in hypovalve thickness and cellular arrangement. Our findings proved the existence of sexual reproduction in P. tricornutum.

关 键 词：Phaeodactylum tricornutum sexual reproduction nuclear transition 

分 类 号：Q949.2[生物学—植物学] Q178.53