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Weak co-ordination between vein and stomatal densities in 105 angiosperm tree species along altitudinal gradients in Southwest China

Citation

Zhao, W-L and Chen, Y-J and Brodribb, TJ and Cao, K-F, Weak co-ordination between vein and stomatal densities in 105 angiosperm tree species along altitudinal gradients in Southwest China, Functional Plant Biology, 43, (12) pp. 1126-1133. ISSN 1445-4408 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Copyright

DOI: doi:10.1071/FP16012

Abstract

Leaf-level water balance, as revealed by a correlation between stomatal density (SD) and vein density (VD), has been reported in some plants. However, the generality of this correlation and how it may be affected by altitude changes are unclear. Here, we investigated whether this balance is maintained across tree species of diverse families along a large altitudinal gradient. We measured leaf area (LA), SD, stomata length (SL), and VD in 105 angiosperm species across two altitudinal ranges, 800-1400 m above sea level (a.s.l.) in tropical montane forests (TMF) and 2000-2600 m a.s.l. in subtropical montane forests (SMF) in Yunnan, South-west China. The average SD was independent of altitude in both regions. Similarly, the average VD within either SMF or TMF was also not significantly different. However, overall, TMF had significantly larger VD and LA but smaller SL than SMF. Vein density was positively correlated with SD across SMF species, with a weaker correlation for TMF species and all species combined. Stomatal length was negatively correlated with SD and VD across all species. Our results extend the leaf water balance theory to diverse angiosperm tree species, and indicate decoupled adaptation of SD and VD in these species along a large altitudinal gradient.

Item Details

Item Type:Refereed Article
Keywords:minor vein density, stomata density, subtropical forests, tropical forests
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Brodribb, TJ (Professor Tim Brodribb)
ID Code:112469
Year Published:2016
Web of Science® Times Cited:3
Deposited By:Plant Science
Deposited On:2016-11-11
Last Modified:2017-11-01
Downloads:0

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