Differential effects of lichens versus liverworts epiphylls on host leaf traits in the tropical montane rainforest, Hainan Island, China.
Differential effects of lichens versus liverworts epiphylls on host leaf traits in the tropical montane rainforest, Hainan Island, China.
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DOI：
10.1155/2014/681369
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发表时间：
2014
影响因子：
--
通讯作者：
An S
中科院分区：
文献类型：
--
作者：
Zhou L;Liu F;Yang W;Liu H;Shao H;Wang Z;An S
昙花广泛地生长在潮湿的热带森林中的维管叶上。了解昙花对寄主植物叶片性状的影响对于了解昙花的生态功能至关重要。在雨林中进行了一项研究，旨在调查寄生地钱和叶状地衣定植的寄主植物红叶石楠的叶子特征以及未定植的叶子的叶子特征。我们的研究结果发现，地衣的定植显着降低了P. prunifolia的叶片含水量（LWC）、叶绿素（Chl）a和a+b含量以及叶绿素a/b含量，但增加了叶绿素b含量，而地钱的定植对它们整体没有影响。不同覆盖度地衣定殖的寄主叶片在去除处理（去除叶表面附生植物的处理）前后的净光合速率（P n）变化大于地钱定殖的寄主叶片。地衣的完全覆盖导致寄主叶子的光补偿点（LCP）增加21％，光饱和点（LSP）降低54％，而地钱则表现出相反的效果。与地钱的定植相比，地衣在定植的不同阶段对楸叶的叶片性状表现出更大的负面影响。研究结果表明，寄主叶片性状对昙花的响应受到昙花类群和覆盖度的影响，这也是评估热带森林昙花生态功能的关键因素。
Epiphylls widely colonize vascular leaves in moist tropical forests. Understanding the effects of epiphylls on leaf traits of host plants is critical for understanding ecological function of epiphylls. A study was conducted in a rain forest to investigate leaf traits of the host plants Photinia prunifolia colonized with epiphyllous liverworts and foliicolous lichens as well as those of uncolonized leaves. Our results found that the colonization of lichens significantly decreased leaf water content (LWC), chlorophyll (Chl) a and a + b content, and Chl a/b of P. prunifolia but increased Chl b content, while that of liverworts did not affect them as a whole. The variations of net photosynthetic rates (P n) among host leaves colonized with different coverage of lichens before or after removal treatment (a treatment to remove epiphylls from leaf surface) were greater than that colonized with liverworts. The full cover of lichens induced an increase of light compensation point (LCP) by 21% and a decrease of light saturation point (LSP) by 54% for their host leaves, whereas that of liverworts displayed contrary effects. Compared with the colonization of liverworts, lichens exhibited more negative effects on the leaf traits of P. prunifolia in different stages of colonization. The results suggest that the responses of host leaf traits to epiphylls are affected by the epiphyllous groups and coverage, which are also crucial factors in assessing ecofunctions of epiphylls in tropical forests.
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影响因子：
10.1
作者：
CHAZDON, RL;PEARCY, RW
通讯作者：
PEARCY, RW
影响因子：
4.2
作者：
BERRIE, GK;EZE, JMO
通讯作者：
EZE, JMO
影响因子：
6.4
作者：
LINDER, S
通讯作者：
LINDER, S
影响因子：
4.2
作者：
Marschall, M;Proctor, MCF
通讯作者：
Proctor, MCF
影响因子：
3
作者：
CLARK, DB;CLARK, DA;GRAYUM, MH
通讯作者：
GRAYUM, MH