Survival and Growth of Epiphytic Ferns Depend on Resource Sharing.
Survival and Growth of Epiphytic Ferns Depend on Resource Sharing.
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附生蕨类植物的生存和生长依赖于资源共享
DOI：
10.3389/fpls.2016.00416
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发表时间：
2016
影响因子：
5.6
通讯作者：
Yu FH
中科院分区：
文献类型：
--
作者：
Lu HZ;Song L;Liu WY;Xu XL;Hu YH;Shi XM;Li S;Ma WZ;Chang YF;Fan ZX;Lu SG;Wu Y;Yu FH
通过生理整合，克隆植物系统可以共享本地可用资源，从而提高其生存和生长。大多数附生植物具有克隆生长的习性，但很少有研究测试的生理整合（资源共享）对附生植物的生存和生长的影响，以及这种影响是否因物种而异。我们进行了两个实验，一个对个人（单个分株）和另一个组（在一个小区内的几个分株），切断和完整的根茎处理（没有和有生理整合）的两个优势附生蕨类植物（Polypodiessubamoena和Lepisoruscampendrium）在中国西南亚热带山地潮湿的森林。根状茎切断（防止整合）显着减少分株存活在个人实验和存活分株的数量在组实验，它也降低了两个物种的生物量在两个实验。然而，这种整合效应的大小在两个物种之间没有显着差异。我们的结论是，资源共享可能是克隆附生植物适应森林冠层资源有限，在空间和时间上分布不均的一般策略。
Locally available resources can be shared within clonal plant systems through physiological integration, thus enhancing their survival and growth. Most epiphytes exhibit clonal growth habit, but few studies have tested effects of physiological integration (resource sharing) on survival and growth of epiphytes and whether such effects vary with species. We conducted two experiments, one on individuals (single ramets) and another on groups (several ramets within a plot), with severed and intact rhizome treatments (without and with physiological integration) on two dominant epiphytic ferns (Polypodiodes subamoena and Lepisorus scolopendrium) in a subtropical montane moist forest in Southwest China. Rhizome severing (preventing integration) significantly reduced ramet survival in the individual experiment and number of surviving ramets in the group experiment, and it also decreased biomass of both species in both experiments. However, the magnitude of such integration effects did not vary significantly between the two species. We conclude that resource sharing may be a general strategy for clonal epiphytes to adapt to forest canopies where resources are limited and heterogeneously distributed in space and time.