Arid
DOI10.1073/pnas.0804294105
Hydraulic integration and shrub growth form linked across continental aridity gradients
Schenk, H. Jochen1; Espino, Susana1; Goedhart, Christine M.1; Nordenstahl, Marisa2; Cabrera, Hugo I. Martinez3; Jones, Cynthia S.3
通讯作者Schenk, H. Jochen
来源期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2008
卷号105期号:32页码:11248-11253
英文摘要

Both engineered hydraulic systems and plant hydraulic systems are protected against failure by resistance, reparability, and redundancy. A basic rule of reliability engineering is that the level of independent redundancy should increase with increasing risk of fatal system failure. Here we show that hydraulic systems of plants function as predicted by this engineering rule. Hydraulic systems of shrubs sampled along two transcontinental aridity gradients changed with increasing aridity from highly integrated to independently redundant modular designs. Shrubs in humid environments tend to be hydraulically integrated, with single, round basal stems, whereas dryland shrubs typically have modular hydraulic systems and multiple, segmented basal stems. Modularity is achieved anatomically at the vessel-network scale or developmentally at the whole-plant scale through asymmetric secondary growth, which results in a semiclonal or clonal shrub growth form that appears to be ubiquitous in global deserts.


英文关键词plant hydraulic systems wood anatomy hydraulic redundancy xylem structure and function
类型Article
语种英语
国家USA ; Argentina
收录类别SCI-E
WOS记录号WOS:000258560700040
WOS关键词GRAY PAYNE ASTERACEAE ; FALSE DISCOVERY RATE ; CAVITATION RESISTANCE ; TEMPERATE TREE ; WATER-MOVEMENT ; PHYLOGENY ; VESSELS ; SAFETY ; SECTORIALITY ; EFFICIENCY
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/158922
作者单位1.Calif State Univ Fullerton, Dept Biol Sci, Fullerton, CA 92834 USA;
2.Univ Buenos Aires, Fac Agron, Buenos Aires, DF, Argentina;
3.Univ Connecticut, Dept Ecol & Evolut Biol, Storrs, CT 06269 USA
推荐引用方式
GB/T 7714
Schenk, H. Jochen,Espino, Susana,Goedhart, Christine M.,et al. Hydraulic integration and shrub growth form linked across continental aridity gradients[J],2008,105(32):11248-11253.
APA Schenk, H. Jochen,Espino, Susana,Goedhart, Christine M.,Nordenstahl, Marisa,Cabrera, Hugo I. Martinez,&Jones, Cynthia S..(2008).Hydraulic integration and shrub growth form linked across continental aridity gradients.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,105(32),11248-11253.
MLA Schenk, H. Jochen,et al."Hydraulic integration and shrub growth form linked across continental aridity gradients".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 105.32(2008):11248-11253.
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