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Carbon Dioxide Compensation Points in Maize and Pelargonium
Author(s) -
Manspield T. A.
Publication year - 1968
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1968.tb07344.x
Subject(s) - pelargonium , photorespiration , carbon dioxide , absorption efficiency , absorption (acoustics) , chemistry , botany , horticulture , biology , zoology , photosynthesis , materials science , composite material , organic chemistry
The carbon dioxide compensation paint established by maize leaves in 10,000 lux at 25°C was less Than 2 μl/l. whereas that achieved by Pelargonium under the same conditions was greater than 60 μl/l. Maize and Pelargonium leaves together in the same leaf chamber established a compensation point between 9 and 19 μl/l. It is concluded that it is a difference in the efficiency of absorption of CO 2 which leads to the marked difference between maize and Pelargonium, rather than the absence of photorespiration in maize or anatomicad differences between the leaves of the two species.