桂林唇柱苣苔传粉生物学及生殖配置研究

对桂林唇柱苣苔在不同生境下（YZ居群，半野生，林下裸露岩石上；DB居群，洞穴岩石上）的生殖生态学进行了比较研究。结果表明：（1）桂林唇柱苣苔的花期为2月下旬至4月中旬，受环境因素的影响，单花期在DB居群（16~24 d）明显长于YZ居群（10~17 d）；（2）两个居群的P/O比差异显著，花粉量比胚珠量有更明显的变化，这可能与其生境有关；（3）桂林唇柱苣苔属于兼性异交系统，不存在无融合生殖现象；(4)传粉和种子后熟阶段均存在限制，致使各种处理的结实率均处在较低的水平（<45％）；（5）白颊尤垫蜂与小蜂类(DB居群)或蜜蜂(YZ居群)为桂林唇柱苣苔较为稳定的传粉者；（6）桂林唇柱苣苔植株个体越大，花期繁殖投入就越高，繁殖分配越低；（7）与DB居群相比，YZ居群可利用资源较为丰富、植株生物量较大，因此其花期投入繁殖也较高，而DB居群将更多的资源分配给营养器官，从而提高了对资源获取能力。

Pollination Biology and Reproductive Allocation of Chirita gueilinensis(Gesneriaceae)

We investigated the reproductive ecology of Chirita gueilinensis in different habitats populations (YZ population,semi-wild,at the sunny cracks and crevices of calcareous rocks with little soil; DB population,at the rupicolous in a cave). Our results indicated that: (1)Flowering took place from late February to middle April,and anthesis of a single flower lasted 10~17 days in YZ population and 16~24 days in DB population depending on environmental conditions. (2)The pollen-ovule ratio(P/O) is different in t...