CHLOROPHYLL SYNTHESIS IN X-IRRADIATED ETIOLATED BEAN LEAF TISSUE

Journal Article · Fri Jun 01 04:00:00 EDT 1962 · Radiation Botany

OSTI ID:4808788

Price, L; Klein, W H

X-irradiated etiolated bean leaf tissue exhibits a marked reduction of chlorophyll synthesis when exposed to continuous white light of high intensity. However, chlorophyll synthesis is appreciably increased in this x-irradiated tissue if subjected to a few minutes of visible radiant energy either before or after x-irradiation, then placed in the dark for several hours, and subsequently exposed to high intensity white light. This light pretreatment, furthermore, appears to be much more effective in the red than in the blue region of the spectrum. The response to light pretreatment of x-irradiated leaves is markedly similar to that found in control samples of non-x-rayed tissue. Rather than an interaction of ionizing radiation and nonionizing radiant energy, light pretreatment appears to induce an independent photomorphogenic response related to the chlorophyll-synthesizing mechanism which is superimposed upon the damage resulting from x-ray dosages. (auth)

• Research Organization: Smithsonian Institution, Washington, D.C.
• NSA Number: NSA-16-026818
• OSTI ID: 4808788
• Journal Information: Radiation Botany, Journal Name: Radiation Botany Vol. Vol: 1
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
CHLOROPHYLL
LIGHT
PHOTOSYNTHESIS
PLANTS
RADIATION DOSES
RADIATION EFFECTS
TISSUES
X RADIATION