KIB OpenIR  > 资源植物与生物技术所级重点实验室
Two strategies by epiphytic orchids for maintaining water balance: thick cuticles in leaves and water storage in pseudobulbs
Yang, Shi-Jian1,2; Sun, Mei2,3; Yang, Qiu-Yun1; Ma, Ren-Yi1,2; Zhang, Jiao-Lin2; Zhang, Shi-Bao1
2016
Source PublicationAOB PLANTS
Volume8Pages:1
AbstractEpiphytes are an important component of tropical and subtropical flora, and serve vital ecological functions in forest hydrology and nutrient fluxes. However, they often encounter water deficits because there is no direct contact between their roots and the soil. The strategies employed by epiphytes for maintaining water balance in relatively water-limited habitats are not completely understood. In the present study, we investigated the anatomical traits, water loss rates, and physiology of leaves and pseudobulbs of four Dendrobium species with different pseudo-bulb morphologies to understand the roles of leaf and pseudobulb in maintaining water balance of epiphytic orchids. Our results showed that two species (D. chrysotoxum and D. officinale), with lower rates of water loss, have thicker leaves and upper cuticles, but lower epidermal thickness and leaf dry mass per area. In contrast, the other two species (D. chrysanthum and D. crystallinum) with thinner cuticles and higher rates of water loss, have less tissue density and greater saturated water contents in their pseudobulbs. Therefore, our results indicate that these latter two species may resist drought by storing water in the pseudobulbs to compensate for their thin cuticles and rapid water loss through the leaves. Under the same laboratory conditions, excised pseudobulbs with attached leaves had lower rates of water loss when compared with samples comprising only excised leaves. This implies that epiphytic orchids utilize two different strategies for sustaining water balance: thick cuticles to conserve water in leaves and water storage in pseudobulbs. Our results also show that Dendrobium species with thin cuticles tend to have pseudobulbs with high water storage capacity that compensates for their faster rates of water loss. These outcomes contribute to our understanding of the adaptive water-use strategies in Dendrobium species, which is beneficial for the conservation and cultivation of epiphytic orchids.
KeywordCuticles Dendrobium Pseudobulb Relative Water Content Water Conservation Water Loss
DOI10.1093/aobpla/plw046
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000392247600001
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/45642
Collection资源植物与生物技术所级重点实验室
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
3.Natl Plateau Wetlands Res Ctr, Kunming 650224, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Yang, Shi-Jian,Sun, Mei,Yang, Qiu-Yun,et al. Two strategies by epiphytic orchids for maintaining water balance: thick cuticles in leaves and water storage in pseudobulbs[J]. AOB PLANTS,2016,8:1.
APA Yang, Shi-Jian,Sun, Mei,Yang, Qiu-Yun,Ma, Ren-Yi,Zhang, Jiao-Lin,&Zhang, Shi-Bao.(2016).Two strategies by epiphytic orchids for maintaining water balance: thick cuticles in leaves and water storage in pseudobulbs.AOB PLANTS,8,1.
MLA Yang, Shi-Jian,et al."Two strategies by epiphytic orchids for maintaining water balance: thick cuticles in leaves and water storage in pseudobulbs".AOB PLANTS 8(2016):1.
Files in This Item: Download All
File Name/Size DocType Version Access License
plw046.pdf(885KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yang, Shi-Jian]'s Articles
[Sun, Mei]'s Articles
[Yang, Qiu-Yun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yang, Shi-Jian]'s Articles
[Sun, Mei]'s Articles
[Yang, Qiu-Yun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yang, Shi-Jian]'s Articles
[Sun, Mei]'s Articles
[Yang, Qiu-Yun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: plw046.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.