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CRASSULACEAN ACID METABOLISM IN YOUNG ORCHID LEAVES
Author(s) -
GOH C. J.,
WARAASWAPATI O.,
AVADHANI P. N.
Publication year - 1984
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1984.tb03585.x
Subject(s) - crassulacean acid metabolism , photosynthesis , botany , biology , horticulture , chemistry
S ummary Acidity fluctuations typical of Crassulacean acid metabolism (CAM) were observed in both young and mature leaves of a succulent orchid hybrid Arachnis Maggie Oei. The maximum level of acidity in young leaves was only half the peak value in the mature leaves. The stomatal rhythm and CO 2 gaseous exchange of mature leaves exhibited CAM characteristics, whereas young leaves showed typical non‐CAM behaviour with low stomatal resistance and a net CO 2 uptake during the day, high resistance and a net CO 2 output during the night. The stomatal movement of both young and mature leaves was regulated by the internal CO 2 concentration of sub‐stomatal chamber.