珍稀濒危植物夏蜡梅的减数分裂观察

Investigation on meiosis of the rare and endangered plant——Calycanthus chinensis

首次研究了夏蜡梅小孢子母细胞的减数分裂过程 ,并观察了花粉粒育性。后期Ⅰ,末期Ⅰ和后期Ⅱ均观察到少量染色体异常行为的发生 ,但整个过程基本正常。花粉粒活性也大都正常。人为的因素可能是夏蜡梅濒危狭域的原因。

The meiotic process of microspore mother cell of Calycanthus chinensis is investigated for the first time, and the fertility of pollen grain is observed. Although in anaphase Ⅰ, telophase Ⅰ and anaphase Ⅱ there are some abnormal chromosome behaviors occurred, the whole process is basically normal. The fertility of most pollen grains is normal also. Human disturbance may be the main factor causing the rare and endangered position and narrow distribution situation of C. chinensis.