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PHOTORESPIRATION IN THE PROTONEMATA OF FUNARIA HYGROMETRICA HEDW.
Author(s) -
Engler D. E.,
Meeuse B. J. D.
Publication year - 1979
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1979.tb00335.x
Subject(s) - darkness , photorespiration , protonema , algae , botany , respiration , oxygen , biology , chemistry , biophysics , biochemistry , photosynthesis , moss , organic chemistry
SUMMARY The protonemata of Funaria hygrometrica Hedw. were shown to photorespire, first by demonstrating that immediately after a period of illumination oxygen was consumed at a rate greater than that characteristic of long‐term dark respiration, and secondly by observing a greater release of 14 CO 2 from 1 – 14 C glycolate in light than in darkness. The glycolate‐oxidizing enzyme had the ability to decompose L(–) lactate but not D(–) lactate, and must therefore be considered to be a glycolate oxidase and not a glycolate dehydrogenase such as operative in some algae. Some implications of these findings are discussed.