title: Lichen photosynthesis in relation to CO2concentration.
abstract: Photosynthetic CO2dependencies were measured for six lichen species, representing a variety of morphologies and collected from widely different habitats. All curves exhibited a linear increase in photosynthesis with increasing CO2concentrations at the lower range of CO2values, but little photosynthetic variation with increasing CO2concentrations at the upper range of CO2values. Half maximal CO2concentration estimates varied from 147-440 μl CO2·l1, but had broadly overlapping confidence intervals. We conclude that lichen CO2dependencies are basically similar to those reported for higher plants and discuss the reasons why widely varying results have previously been published.
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: T H
authors.initials: TH
authors.lastname: Nash
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Moser
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: S O
authors.initials: SO
authors.lastname: Link
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: L J
authors.initials: LJ
authors.lastname: Ross
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: A
authors.initials: A
authors.lastname: Olafsen
authors.affiliation: Dept. of Botany and Microbiology, Arizona State University, 85287, Tempe, AZ, USA.
authors.forename: U
authors.initials: U
authors.lastname: Matthes