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Phytochrome action in Oryza sativa L. IV. Red and far red reversible effect on the production of ethylene in excised coleoptiles

Journal Article · · Plant Physiol.; (United States)
DOI:https://doi.org/10.1104/pp.48.3.241· OSTI ID:5518274
; ;
Excised apical segments of etiolated rice (Oryza sativa L.) coleoptiles produced ethylene. Increasing the number of cut sites per coleoptile increased the rate of ethylene formation. Ethylene produced by an etiolated-intack seedling in the dark was about a half of that by the excised coleoptile segment. Red light of low energy as well as of continuous irradiation inhibited the production of ethylene. The inhibition by a low energy dose of red light was partly relieved, if the red light was followed immediately by a small dose of far red light. The effect of red and far red light was repeatedly reversible, indicating that ethylene production was regulated by a phytochrome system. If the exposure to far red light was preceded by a period of darkness, this photoreversibility disappeared; 50% of the initial reversibility was lost within 5 hours. Applied ethylene (10 microliters per liter) significantly promoted the growth of intact coleoptiles of either totally etiolated or red light-treated seedlings, but had no effect on the excised apical segment of coleoptile. 16 references, 3 figures, 5 tables.
Research Organization:
Nogoya Univ., Japan
OSTI ID:
5518274
Journal Information:
Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 48; ISSN PLPHA
Country of Publication:
United States
Language:
English

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Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKENES
BIOLOGICAL EFFECTS
BIOSYNTHESIS
CEREALS
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
ETHYLENE
FAR INFRARED RADIATION
GRASS
GROWTH
HYDROCARBONS
INFRARED RADIATION
INHIBITION
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHYTOCHROMES
PIGMENTS
PLANT GROWTH
PLANTS
RADIATIONS
RICE
STIMULATION
SYNTHESIS
VISIBLE RADIATION