钙离子浓度对三种贵州喀斯特地区苔藓植物孢子萌发及原丝体生长的影响

EFFECTS OF Ca￣(++)──ION CONCENTRATION ON SPORE GERMINATION AND PROTENOMA GROWTH OF THREE BRYOPHYTES

为了探讨喀斯特环境中钙离子对苔藓孢子的影响，本文设计了液体培养基实验。研究结果表明，紫背苔孢子萌发范围为０％～０．１％，而反纽藓和直叶珠藓孢子萌发范围为０％～０．５％。三种苦藓孢子萌发率在钙离子浓度为０．０２％时最高；在钙离子浓度为０．０２％时，三种苔藓原丝体生长状况最好。

The effect of Ca(++)-ion concentration on spore germination and protenoma growth of plagiochasma sessillicephalum,Timmiella anomala and Bartramia ithyphylla are studied under controlled condition,two mosses from karst area of Mount Yuntai,one livewort from Huangguoshu Karts area of Guishou Province.Data is based on 10-day-old culture of liquid medium.In culture both Timmiella anomala and Bartramia ithrohylla showed spore germination at Ca(++)-ion concentration 0%￣0.5%, and Plagiochasma sessillicephalum at 0%￣0.1%.Maximum percentage of spore germination and protenoma growth in three species was obtained at Ca(++)-ion concentration 0.02%.