Elevated Atmospheric Carbon Dioxide and Ozone Concentrations Alter Leaf Area Index Through Changes in Leaf Production and Expansion

McGrath, Justin M.

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https://hdl.handle.net/2142/87060 Copy

Description

Title

Elevated Atmospheric Carbon Dioxide and Ozone Concentrations Alter Leaf Area Index Through Changes in Leaf Production and Expansion

Author(s)

McGrath, Justin M.

Issue Date

2009

Doctoral Committee Chair(s)

Elizabeth Ainsworth

Department of Study

Plant Biology

Discipline

Plant Biology

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

Biology, Plant Physiology

Language

eng

Abstract

This research has shown that although elevated [CO2] increased LAI in aspen and soybean, the mechanisms for the change differed between the species. Leaf number was increased by elevated [CO2] in aspen, whereas individual leaf size was increased in soybean. Aspen and soybean had similar responses to elevated [O3]. Most previous research has ignored the potential effects of O3 on young leaves and leaf growth; however, this research showed that elevated [O3] altered growth properties of young soybean leaves and had indirect, lasting effects on leaf growth and function in aspen. While there was evidence that elevated [CO 2] protects from elevated [O3], there were also notable exceptions, indicating that elevated [CO2] will not always cancel the negative effects of elevated [O3] on leaf growth and canopy structure.

Graduation Semester

2009

Type of Resource

text

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http://hdl.handle.net/2142/87060

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