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Carbon dioxide‐independent and ‐dependent components of light inhibition of the conversion of 1‐aminocyclopropane‐1‐carboxylic acid to ethylene in oat leaves
Author(s) -
Preger Ronit,
Gepstein Shimon
Publication year - 1984
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.1399-3054.1984.tb04562.x
Subject(s) - ethylene , carbon dioxide , darkness , 1 aminocyclopropane 1 carboxylic acid , chemistry , avena , incubation , photochemistry , biochemistry , botany , organic chemistry , catalysis , biology
Light inhibits while carbon dioxide enhances the conversion of 1‐aminocyclopropane‐1‐carboxylic acid (ACC) to ethylene in oat ( Avena sativa L. cv. Victory) leaf segments. The possibility that the light inhibition is mediated through changes of carbon dioxide has been investigated. The level of CO 2 increases or decreases in the sealed incubation vial in darkness or in light, respectively, which can apparently account for the differences in ACC‐dependent ethylene production between the dark and light treatments. However, although the evolution of ethylene from ACC in the dark is reduced upon depletion of CO 2 , the difference between light and dark is still very noticeable. Moreover, the production of the ethylene in CO 2 ‐free air in the dark was still higher than in the light, where the concentration of CO 2 was 0.01%. It is proposed that the light effect on the conversion of ACC to ethylene is composed of two distinguishable components: one CO 2 ‐mediated and the other CO 2 ‐independent.