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Intercellular CO Concentration and Water-use Efficiency of Temperate Plants with Different Life-forms and from Different Microhabitats

Overview
Journal Oecologia
Specialty Environmental Health
Date 2017 Mar 18
PMID 28311781
Citations 11
Authors
F Yoshie
Affiliations
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Abstract

Photosynthesis and transpiration were measured simultaneously, under near-optimum and constant environmental conditions, in intact leaves of plants native to the temperate forest region. A linear relationship between photosynthetic rate and stomatal conductance was found in every species tested irrespective of leaf age or season, indicating that the calculated intercellular CO concentration and water-use efficiency were fairly constant within a species. The values of intercellular CO concentration and water-use efficiency ranged from 221 to 271 μl l [Formula: see text] and 4.46 to 8.20 μmol CO mmolHO (6.24±0.90 μmol CO mmolHO), respectively. The variations in intercellular CO concentration and water-use efficiency were not directly related to photosynthetic capacities, life-forms, or microhabitat preferences. The intercellular CO concentrations found in this study were close to values reported from cultivated plants and plants native to more arid regions, suggesting a common mechanism to maintain the stomatal conductance proportional to photosynthetic capacity over a wide variety of C plants.

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