Arid
DOI10.1002/ajb2.1166
Gas exchange characteristics of giant cacti species varying in stem morphology and life history strategy
Huber, John1,2; Dettman, David L.2; Williams, David G.3; Hultine, Kevin R.1
通讯作者Hultine, Kevin R.
来源期刊AMERICAN JOURNAL OF BOTANY
ISSN0002-9122
EISSN1537-2197
出版年2018
卷号105期号:10页码:1688-1702
英文摘要

Premise of the Study Methods Giant cacti species possess long cylindrical stems that store massive amounts of water and other resources to draw on for photosynthesis, growth, and reproduction during hot and dry conditions. Across all giant cacti taxa, stem photosynthetic surface area to volume ratio (S:V) varies by several fold. This broad morphological diversity leads to the hypothesis that giant cacti function along a predictable resource use continuum from a "safe" strategy reflected in low S:V, low relative growth rates (RGR), and low net assimilation rates (A(net)) to a high-risk strategy that is reflected in high S:V, RGR, and A(net). To test this hypothesis, whole-plant gas exchange, chlorophyll fluorescence, and whole-spine-tissue carbon isotope ratios (delta C-13) were measured in four giant cacti species varying in stem morphology and RGR. Measurements were conducted on five well-watered, potted plants per species. Key Results Conclusions Under conditions of mild diel temperatures and low atmospheric vapor pressure deficit, A(net), transpiration (E), and stomatal conductance (G(s)) were significantly higher, and water-use efficiency (A(net) : G(s)) was lower in fast-growing, multi-stemmed species compared to the slower growing, single-stemmed species. However, under warmer, less optimal conditions, gas exchange converged between stem types, and neither delta C-13 nor chlorophyll fluorescence varied among species. The results add to a growing body of evidence that succulent-stemmed plants function along a similar economic spectrum as leaf-bearing plants such that functional traits including stem RGR, longevity, morphology, and gas exchange are correlated across species with varying life-history strategies.


英文关键词Cactaceae carbon isotope ratios net assimilation rate Sonoran Desert stem economic trait spectrum stem succulents stem surface area to volume ratio
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000449490000008
WOS关键词CRASSULACEAN ACID METABOLISM ; OPUNTIA-FICUS-INDICA ; RELATIVE GROWTH-RATE ; CARBON-ISOTOPE DISCRIMINATION ; LEAF ECONOMICS SPECTRUM ; NET ASSIMILATION RATE ; SAGUARO CACTUS ; CARNEGIEA-GIGANTEA ; SONORAN DESERT ; COLUMNAR CACTI
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207486
作者单位1.Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ 85008 USA;
2.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA;
3.Univ Wyoming, Dept Bot, Laramie, WY 82071 USA
推荐引用方式
GB/T 7714
Huber, John,Dettman, David L.,Williams, David G.,et al. Gas exchange characteristics of giant cacti species varying in stem morphology and life history strategy[J]. University of Arizona,2018,105(10):1688-1702.
APA Huber, John,Dettman, David L.,Williams, David G.,&Hultine, Kevin R..(2018).Gas exchange characteristics of giant cacti species varying in stem morphology and life history strategy.AMERICAN JOURNAL OF BOTANY,105(10),1688-1702.
MLA Huber, John,et al."Gas exchange characteristics of giant cacti species varying in stem morphology and life history strategy".AMERICAN JOURNAL OF BOTANY 105.10(2018):1688-1702.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Huber, John]的文章
[Dettman, David L.]的文章
[Williams, David G.]的文章
百度学术
百度学术中相似的文章
[Huber, John]的文章
[Dettman, David L.]的文章
[Williams, David G.]的文章
必应学术
必应学术中相似的文章
[Huber, John]的文章
[Dettman, David L.]的文章
[Williams, David G.]的文章
相关权益政策
暂无数据
收藏/分享

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。