The effect of atmospheric carbon dioxide enrichment on growth and photosynthesis of chrysanthemum and geranium
Year: 1990
Type: dissertation
Abstract: The major objective of this thesis was to describe the time course response of growth and photosynthesis to elevated carbon dioxide (1000 microlitres per litre). Growth analysis of geranium and chrysanthemum grown in glasshouse compartments revealed that the main effects of CO₂ enrichment were upon unit leaf rate. Chrysanthemum responded to CO₂ enrichment early in growth, and geranium much later. Weekly intermittent CO₂ application was equally effective as continuous enrichment for chrysanthemum, but not for geranium. Photosynthetic measurements on geranium grown from seed in controlled- environment growth chambers revealed that leaf lifetime carbon gain was increased 98% with CO₂ enrichment. Photosynthetic acclimation of plants switched from low to high CO₂ at various stages of leaf development showed different responses with age. Carbon dioxide enrichment increased leaf thickness, but had no effect on final stomatal density. This study served to illustrate the magnitude of species differences, and the need to describe photosynthetic responses both in terms of physiological age and developmental conditions.
Source: AcadiaU-DEV
DOI: 10.26108/cp3d-mj27
Author: Kelly, Douglas Wayne
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Climate action
Open Access status: green
OpenAlex ID: W7110367024