Long-term acclimation of leaf production, development, longevity and quality following 3 yr exposure to free-air CO2 enrichment during canopy closure in Populus

• The effects of elevated CO2 on leaf development in three genotypes of Populus were investigated during canopy closure, following exposure to elevated CO2 over 3 yr using free-air enrichment. • Leaf quality was altered such that nitrogen concentration per unit d. wt (N mass) declined on average by...

Full description

Saved in:
Bibliographic Details
Published in:The New phytologist 2004-05, Vol.162 (2), p.413-426
Main Authors: Tricker, P.J, Calfapietra, C, Kuzminsky, E, Puleggi, R, Ferris, R, Nathoo, M, Pleasants, L.J, Alston, V, de Angelis, P, Taylor, G
Format: Article
Language:English
Subjects:
acclimation
Acclimatization
Animal, plant and microbial ecology
Applied ecology
atmospheric circulation
Biological and medical sciences
canopy
canopy closure
Carbon dioxide
carbon dioxide enrichment
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on plants and fungi
elevated CO2
Epidermal cells
Forest canopy
forest trees
Fundamental and applied biological sciences. Psychology
Growing seasons
Leaf area
Leaf development
leaf longevity
leaf nitrogen concentration
Leaves
Longevity
nitrogen content
plant ecology
plant morphology
plant physiology
Plants
POPFACE
Populus
Populus alba
Populus canadensis
Populus nigra
specific leaf area
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:• The effects of elevated CO2 on leaf development in three genotypes of Populus were investigated during canopy closure, following exposure to elevated CO2 over 3 yr using free-air enrichment. • Leaf quality was altered such that nitrogen concentration per unit d. wt (N mass) declined on average by 22 and 13% for sun and shade leaves, respectively, in elevated CO2. There was little evidence that this was the result of 'dilution' following accumulation of nonstructural carbohydrates. Most likely, this was the result of increased leaf thickness. Specific leaf area declined in elevated CO2 on average by 29 and 5% for sun and shade leaves, respectively. • Autumnal senescence was delayed in elevated CO2 with a 10% increase in the number of days at which 50% leaf loss occurred in elevated as compared with ambient CO2. • These data suggest that changes in leaf quality may be predicted following long-term acclimation of fast-growing forest trees to elevated CO2, and that canopy longevity may increase, with important implications for forest productivity.
ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.2004.01057.x