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Citation for Study 14241

Citation title: "Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest".

Study name: "Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest".

This study is part of submission 14241 (Status: Published).

Citation

Olson M.E. 2013. Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest. International Journal of Plant Sciences, .

Authors

• Olson M.E.

Abstract

? Premise of the Research: Variation in average xylem vessel diameter across species has important functional consequences, but the causes of this variation remain unclear. Average vessel diameter is known to scale with stem size within and across species. Vessel diameter also seems to differ between clades and across environments, with dryland plants having narrower, more cavitation resistant vessels. As a result, it is not clear to what extent phylogenetic affinity and environment are associated with differences in the vessel diameter-stem size relationship. ? Methodology: With linear models and correlations, we explored the influence of environment and phylogeny on the vessel diameter-stem diameter relationship in a molecular phylogenetic context across 83 species in four families spanning desert to rainforest in the Americas, Africa, Asia, and Madagascar. ? Pivotal Results: Mean species vessel diameter was strongly predicted by trunk diameter (slope 0.324), and this slope was not affected by phylogenetic affinity or environment. Clades differed only slightly in mean vessel diameter when controlling for stem size and there was no tendency for plants of moist environments to have wider vessels. Of four climate indices, only the temperature index contributed to explaining vessel diameter, and this very weakly. ? Conclusions: Our results are congruent with models suggesting that natural selection should maximize vessel conductivity while minimzing cavitation risk via vessel taper in the context of conductive path length. Because neither environment nor phylogeny contributed to explaining vessel diameter-stem diameter scaling across species, our results appear congruent with the notion that selection favoring cavitation resistance via narrow vessels should lead to shorter statures independently of ancestry or habitat. The repeated finding of narrow vessels in dryland plants might therefore reflect the smaller average stem size of plants in drylands, rather than their having vessels that are narrow for their stem diameters.

Keywords

allometry, comparative methods, conduit taper, ecological wood anatomy, linear mixed models, xylem vessels

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S14241
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref22004,
  	 author = {Mark E Olson},
  	 title = {Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest},
  	 year = {2013},
  	 keywords = {allometry, comparative methods, conduit taper, ecological wood anatomy, linear mixed models, xylem vessels},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {International Journal of Plant Sciences},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {?  Premise of the Research: Variation in average xylem vessel diameter across species has important functional consequences, but the causes of this variation remain unclear. Average vessel diameter is known to scale with stem size within and across species. Vessel diameter also seems to differ between clades and across environments, with dryland plants having narrower, more cavitation resistant vessels. As a result, it is not clear to what extent phylogenetic affinity and environment are associated with differences in the vessel diameter-stem size relationship. 
  
  ?  Methodology: With linear models and correlations, we explored the influence of environment and phylogeny on the vessel diameter-stem diameter relationship in a molecular phylogenetic context across 83 species in four families spanning desert to rainforest in the Americas, Africa, Asia, and Madagascar. 
  
  ?  Pivotal Results: Mean species vessel diameter was strongly predicted by trunk diameter (slope 0.324), and this slope was not affected by phylogenetic affinity or environment. Clades differed only slightly in mean vessel diameter when controlling for stem size and there was no tendency for plants of moist environments to have wider vessels. Of four climate indices, only the temperature index contributed to explaining vessel diameter, and this very weakly.
   
  ?  Conclusions: Our results are congruent with models suggesting that natural selection should maximize vessel conductivity while minimzing cavitation risk via vessel taper in the context of conductive path length. Because neither environment nor phylogeny contributed to explaining vessel diameter-stem diameter scaling across species, our results appear congruent with the notion that selection favoring cavitation resistance via narrow vessels should lead to shorter statures independently of ancestry or habitat. The repeated finding of narrow vessels in dryland plants might therefore reflect the smaller average stem size of plants in drylands, rather than their having vessels that are narrow for their stem diameters. 
  }
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 22004
  AU  - Olson,Mark E
  T1  - Convergent vessel diameter-stem diameter scaling across five clades of New- and Old- World eudicots from desert to rainforest
  PY  - 2013
  KW  - allometry
  KW  - comparative methods
  KW  - conduit taper
  KW  - ecological wood anatomy
  KW  - linear mixed models
  KW  - xylem vessels
  UR  - http://dx.doi.org/
  N2  - ?  Premise of the Research: Variation in average xylem vessel diameter across species has important functional consequences, but the causes of this variation remain unclear. Average vessel diameter is known to scale with stem size within and across species. Vessel diameter also seems to differ between clades and across environments, with dryland plants having narrower, more cavitation resistant vessels. As a result, it is not clear to what extent phylogenetic affinity and environment are associated with differences in the vessel diameter-stem size relationship. 
  
  ?  Methodology: With linear models and correlations, we explored the influence of environment and phylogeny on the vessel diameter-stem diameter relationship in a molecular phylogenetic context across 83 species in four families spanning desert to rainforest in the Americas, Africa, Asia, and Madagascar. 
  
  ?  Pivotal Results: Mean species vessel diameter was strongly predicted by trunk diameter (slope 0.324), and this slope was not affected by phylogenetic affinity or environment. Clades differed only slightly in mean vessel diameter when controlling for stem size and there was no tendency for plants of moist environments to have wider vessels. Of four climate indices, only the temperature index contributed to explaining vessel diameter, and this very weakly.
   
  ?  Conclusions: Our results are congruent with models suggesting that natural selection should maximize vessel conductivity while minimzing cavitation risk via vessel taper in the context of conductive path length. Because neither environment nor phylogeny contributed to explaining vessel diameter-stem diameter scaling across species, our results appear congruent with the notion that selection favoring cavitation resistance via narrow vessels should lead to shorter statures independently of ancestry or habitat. The repeated finding of narrow vessels in dryland plants might therefore reflect the smaller average stem size of plants in drylands, rather than their having vessels that are narrow for their stem diameters. 
  
  L3  - 
  JF  - International Journal of Plant Sciences
  VL  - 
  IS  - 
  ER  -