Differentiation of water-related traits in terrestrial and epiphytic Cymbidium species
文献类型：期刊论文
| 作者 | Zhang, Jiao-Lin
|
| 刊名 | FRONTIERS IN PLANT SCIENCE
 |
| 出版日期 | 2015 |
| 卷号 | 6页码:- |
| 关键词 | Cymbidium drought tolerance epiphytes photosynthesis succulence water loss water storage water supply |
| ISSN号 | 1664-462X |
| 中文摘要 | Epiphytes that grow in the canopies of tropical and subtropical forests experience different water regimes when compared with terrestrial plants. However, the differences in adaptive strategies between epiphytic and terrestrial plants with respect to plant water relations remain poorly understood. To understand how water-related traits contrast between epiphytic and terrestrial growth forms within the Cymbidium (Orchidaceae), we assessed leaf anatomy, hydraulics, and physiology of seven terrestrial and 13 epiphytic species using a common garden experiment. Compared with terrestrial species, epiphytic species had higher values for leaf mass per unit area (LMA), leaf thickness (LT), epidermal thickness, saturated water content (SWC) and the time required to dry saturated leaves to 70% relative water content (T-70). However, vein density (D-vein), stomatal density (SD), and photosynthetic capacity (A(max)) did not differ significantly between the two forms. T-70 was positively correlated with LT, LMA, and SWC, and negatively correlated with stomatal index (SI). A(max) showed positive correlations with SD and SI, but not with D-vein. Vein density was marginally correlated with SD, and significantly correlated with SI. Overall, epiphytic orchids exhibited substantial ecophysiological differentiations from terrestrial species, with the former type showing trait values indicative of greater drought tolerance and increased water storage capacity. The ability to retain water in the leaves plays a key role in maintaining a water balance in those epiphytes. Therefore, the process of transpiration depends less upon the current substrate water supply and enables epiphytic Cymbidium species to adapt more easily to canopy habitats. |
| 原文出处 | 10.3389/fpls.2015.00260 |
| 语种 | 英语 |
| 公开日期 | 2015-07-15 |
| 源URL | [http://ir.xtbg.org.cn/handle/353005/9197]  |
| 专题 | 西双版纳热带植物园_植物生理生态研究组 |
| 推荐引用方式 GB/T 7714 | Zhang, Jiao-Lin. Differentiation of water-related traits in terrestrial and epiphytic Cymbidium species[J]. FRONTIERS IN PLANT SCIENCE,2015,6:-. |
| APA | Zhang, Jiao-Lin.(2015).Differentiation of water-related traits in terrestrial and epiphytic Cymbidium species.FRONTIERS IN PLANT SCIENCE,6,-. |
| MLA | Zhang, Jiao-Lin."Differentiation of water-related traits in terrestrial and epiphytic Cymbidium species".FRONTIERS IN PLANT SCIENCE 6(2015):-. |
入库方式： OAI收割
来源：西双版纳热带植物园
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。