Abstract
Measurements of net photosynthesis have been used extensively to determine the degree of ecotypic variation and photosynthetic plasticity in a variety of plants. Gas exchange patterns have been compared for species found along gradients of altitude (Mooney and Shropshire, 1967; Chapin and Oechel, 1983), light (Kershaw et al., 1983; MacFarlane et al., 1983), and microtopography (Kershaw, 1975; Larson and Kershaw, 1975) as well as contrasting maritime and continental (Pearcy, 1977; Mooney, 1980) or temperate and arctic (Brown and Kershaw, 1984) conditions. In all of these papers a similar logic is followed. Populations are chosen because of distinct differences in morphology, microclimatic or macroclimatic conditions. Measurements are then made of the response of net photosynthesis to light, temperature and season and any variation observed is used to support the initial premise that the populations were distinct. A circular argument is therefore generated, without any attempt to establish the genetic basis of these differences.
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© 1985 Plenum Press, New York
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Brown, D., Kershaw, K.A. (1985). Electrophoretic and Gas Exchange Patterns of Two Populations of Peltigera Rufescens . In: Brown, D.H. (eds) Lichen Physiology and Cell Biology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2527-7_8
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DOI: https://doi.org/10.1007/978-1-4613-2527-7_8
Publisher Name: Springer, Boston, MA
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