The Effects of Increased Co2 on Leaf Senescence of Yellow-Poplar and White Oak Seedlings
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Authors
Cockrill, Marion
Issue Date
1990
Type
Thesis
Language
en_US
Keywords
Alternative Title
Abstract
The level of atmospheric CO2 has been increasing for the past 250 years due
to industrialization and deforestation. This experiment, done at Oak Ridge National
Laboratory, investigated the effects of increased CO2 concentration on leaf
senescence of deciduous tree seedlings.
The seedlings were planted in the ground inside open-top chambers. CO2 at
levels of 300ppm + ambient, 150ppm + ambient, and Oppm + ambient were
pumped into the chambers during the growing season. There were 2 rows of 3
chambers, each row containing the 3 different CO2 chambers. Chlorophyll,
carotenoid, and soluble protein concentration were measured as well as
photosynthetic rates over time. Increased CO2 concentration caused higher
photosynthetic rates, but did not affect rates of senescence within the leaves of these
seedlings.
Description
iv, 37 p.
Citation
Publisher
Kalamazoo College
License
U.S. copyright laws protect this material. Commercial use or distribution of this material is not permitted without prior written permission of the copyright holder.