Patterns of Variation in MHC Class II Beta Loci of the Little Greenbul (Andropadus virens) with Comments on MHC Evolution in Birds
View/ Open
(435.3Kb)
Access Status
Full text of the requested work is not available in DASH at this time ("restricted access"). For more information on restricted deposits, see our FAQ.Published Version
https://doi.org/10.1046/j.1469-8137.2003.00736.xMetadata
Show full item recordCitation
Brodribb, Tim J., and Noel Michele Holbrook. 2003. Changes in leaf hydraulic conductance during leaf shedding in seasonally dry tropical forest. New Phytologist 158, no. 2: 295-303.Abstract
The hydraulic conductance of leaves (kleaf) was examined to determine whether this little understood component of the water transport pathway plays a role in governing leaf phenology of two deciduous dry forest trees (Calycophyllum candidissimum and Rhedera trinervis ). kleaf was monitored in parallel with stem hydraulic conductivity (Kstem) during the transition from wet to dry season. The relationships between declining photosynthetic quantum yield during senescence and declining kleaf and Kstem were compared. Divergent patterns were observed in the response of Kstem to seasonal drying; however, the behaviour of kleaf was essentially similar in both species. Large (five- to ten-fold) decreases in leaf hydraulic conductance occurred before, and during the later stages of leaf senescence. During senescence, declining kleaf, which continued until leaves were ultimately shed, was associated with a concomitant decline in quantum yield. We conclude that, in these species, the loss of hydraulic conductance of the leaf vascular system is linked to, and possibly responsible for, the loss of photosynthetic capacity during leaf senescence.Citable link to this page
http://nrs.harvard.edu/urn-3:HUL.InstRepos:3203287
Collections
- FAS Scholarly Articles [18256]
Contact administrator regarding this item (to report mistakes or request changes)