Photoreversible control of elongation of pinto beans and other plants under normal conditions of growth

Journal Article · Sat Jun 01 04:00:00 EDT 1957 · Bot. Gaz. (Chicago); (United States)

DOI:https://doi.org/10.1086/335946· OSTI ID:5720926

Downs, R J; Hendricks, S B; Borthwick, H A

Internodes of young seedlings of Pinto bean (Phaseolus vulgaris), grown under fluorescent lights, elongated to about three or more times their normal length in response to low radiant energies of unfiltered incandescent-filament light applied at the close of daily high-energy fluorescent-light periods. The lengthening response was due to the far-red radiant energy of the supplemental light and was completely and repeatedly reversible with red. Maximum lengthening occurred when the plants received cycles of about 4 hours of light and 20 hours of dark. Plants that received no daily high-energy period of light did not elongate in response to far-red treatments unless given sugar solution through their severed hypocotyls. The lengthening response was found to result from the action of a photoreversible pigment. Plants of several other bean varieties, both bush and pole, were found to respond like Pinto to far-red and red treatments as also did sunflower and two species of ornamental morning-glory. 14 references, 7 figures, 6 tables.

• Research Organization: Dept. of Agriculture, Beltsville, MD
• OSTI ID: 5720926
• Journal Information: Bot. Gaz. (Chicago); (United States), Journal Name: Bot. Gaz. (Chicago); (United States) Vol. 118:4; ISSN BOGAA
• Country of Publication: United States
• Language: English

Related Subjects

550500 -- Metabolism
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
ELECTROMAGNETIC RADIATION
GROWTH
LEGUMINOSAE
ORNAMENTAL PLANTS
PHASEOLUS
PLANT GROWTH
PLANTS
RADIATIONS
SEEDLINGS
STIMULATION
SUNFLOWERS
VISIBLE RADIATION