Photosynthesis-related infrared light transmission changes in spinach leaf segments

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · Arch. Biochem. Biophys.; (United States)

DOI:https://doi.org/10.1016/0003-9861(85)90507-7· OSTI ID:6335950

Akimoto, T

The time courses of infrared light transmission changes and fluorescence induced by light in spinach leaf segments were measured. The illumination by red light exhibited a complex wave pattern. The transmission approached the baseline after repeating decreases and increases. Illumination by far-red light decreased the transmission. One of the differences between the two responses was the difference between the two amplitudes of the first increasing component. The component in the red light response was larger than the component in the far-red light response. The transmission decrease by far-red light is supposed to correspond to ''red drop.'' The transmission decrease by far-red light was suppressed by red light. This is due to an activation of a transmission-increasing component. This probably corresponds to ''enhancement.'' A proportional correlation existed between the intensity of far-red light and the minimum intensity of red light that suppressed the transmission decrease induced by far-red light. The component which made Peak D in the time course of fluorescence yield and the first increasing component in the transmission changes were suppressed by intense light.

• Research Organization: Tokyo Teishin Hospital, Japan
• OSTI ID: 6335950
• Journal Information: Arch. Biochem. Biophys.; (United States), Vol. 1
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
INFRARED RADIATION
BIOLOGICAL EFFECTS
LEAVES
FLUORESCENCE SPECTROSCOPY
PHOTOSYNTHESIS
SPINACH
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
EMISSION SPECTROSCOPY
FOOD
PHOTOCHEMICAL REACTIONS
PLANTS
RADIATIONS
SPECTROSCOPY
SYNTHESIS
VEGETABLES
550201* - Biochemistry- Tracer Techniques