The University of Southampton
University of Southampton Institutional Repository

Impact of gaseous air pollution on leaf growth of hybrid poplar

Impact of gaseous air pollution on leaf growth of hybrid poplar
Impact of gaseous air pollution on leaf growth of hybrid poplar
Production of woody biomass in poplars is closely linked to leaf area development. Air pollution may stimulate the premature senescence and loss of poplar leaves, but little work has focused on understanding how pollution alters leaf growth. This report describes two experiments which address this question. When trees were grown in open-top chambers and exposed to ambient pollution, final leaf size was initially reduced compared with that achieved in filtered air. After approximately 8 weeks of exposure leaf growth rate and final leaf size were stimulated in ambient pollution compared with leaves in filtered air and this was associated with senescence and loss of older leaves. A biophysical analysis of leaf cell expansion revealed that the effective turgor for growth of young poplar leaves was large and declined with leaf age, reaching zero as the leaf stopped growing. Cell wall extensibility was also maximal in rapidly growing leaves and declined for older leaves. Exposure of poplars to 50 ppb O3 had no effect on leaf growth or the control of leaf cell expansion.
0378-1127
151-162
Taylor, Gail
Frost, D.L.
9f74a6c0-ea55-4d60-b081-ce86ad9bc478
Taylor, Gail
Frost, D.L.
9f74a6c0-ea55-4d60-b081-ce86ad9bc478

Taylor, Gail and Frost, D.L. (1992) Impact of gaseous air pollution on leaf growth of hybrid poplar. Forest Ecology and Management, 51 (1-3), 151-162. (doi:10.1016/0378-1127(92)90481-N).

Record type: Article

Abstract

Production of woody biomass in poplars is closely linked to leaf area development. Air pollution may stimulate the premature senescence and loss of poplar leaves, but little work has focused on understanding how pollution alters leaf growth. This report describes two experiments which address this question. When trees were grown in open-top chambers and exposed to ambient pollution, final leaf size was initially reduced compared with that achieved in filtered air. After approximately 8 weeks of exposure leaf growth rate and final leaf size were stimulated in ambient pollution compared with leaves in filtered air and this was associated with senescence and loss of older leaves. A biophysical analysis of leaf cell expansion revealed that the effective turgor for growth of young poplar leaves was large and declined with leaf age, reaching zero as the leaf stopped growing. Cell wall extensibility was also maximal in rapidly growing leaves and declined for older leaves. Exposure of poplars to 50 ppb O3 had no effect on leaf growth or the control of leaf cell expansion.

Text
Impact_of_gaseous_air_pollution_on_leaf_growth_of_hybrid_poplar.pdf - Version of Record
Restricted to Repository staff only

More information

Published date: 1992

Identifiers

Local EPrints ID: 159889
URI: http://eprints.soton.ac.uk/id/eprint/159889
ISSN: 0378-1127
PURE UUID: cc850005-bf6b-4a2d-b05b-fb4267da9b71

Catalogue record

Date deposited: 08 Jul 2010 10:47
Last modified: 14 Mar 2024 01:55

Export record

Altmetrics

Contributors

Author: Gail Taylor
Author: D.L. Frost

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×