溪流岩生明叶藓生境及有性生殖特性

Habitat and Sexual Reproductive System in Vesicularia Montagnei,a Rock Outcrop Moss in a Stream

采用野外调查和室内观察相结合的方法,对溪流岩生明叶藓的生境和有性生殖系统进行了系统分析.(1)明叶藓的生境特殊,生长在溪流岩石表面,一部分个体经常处于淹水状态下,大部分个体间断性地生长于淹水状态下.(2)明叶藓雌器苞中的颈卵器平均数量为(18.2±6.2)个(N=30),雄器苞中精子器平均数量为(8.3±2.7)个(N=30);孢子体的平均长度为(1.8±0.17)cm(N=20),蒴柄的平均长度为(1.6±0.16)cm(N=20),孢蒴的长度为(0.2±0.02)cm(N=20).(3)明叶藓的孢子体发育时期为每年6—9月,其中6月为胚发育时期,7月份为孢蒴形成期,8—9月为孢子成熟期.

Based on the field investigations and laboratory examinations on V.montagnei,the authors studied its habitat and sexual reproductive system.The results were described as following：（1） the habitat of V.montagnei is very special,which is the surfaces of rocks in a stream.Part individuals live in flooded condition constantly,but most individuals grow in the flooded condition intermittently.（2） The average number of archegonia is（18.2±6.2）（N=30） in per perichaetium,the average number of antheridia is（8.3±2.7）（N=30） in per perigonium,the average length of sporophyte is（1.8±0.17）（N=20） cm,the average length of seta is（1.6±0.16）（N=20） cm,and the average length of capsule is（0.2±0.02）（N=20） cm.（3） The development period of sporophyte in V.montagnei is between June and September among which embryo period is in June,capsule formation takes place in July,spore maturity period is concentrated on between August and September.