NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 4 of 73
Light-stimulated cell expansion in bean (Phaseolus vulgaris L.) leaves. II. Quantity and quality of light required
Author and Affiliation:
Van Volkenburgh, E.(University of Washington, Botany Department, Seattle 98195, United States)
Cleland, R. E.
Watanabe, M.
Abstract: The quantity and quality of light required for light-stimulated cell expansion in leaves of Phaseolus vulgaris L. have been determined. Seedlings were grown in dim red light (RL; 4 micromoles photons m-2 s-1) until cell division in the primary leaves was completed, then excised discs were incubated in 10 mM sucrose plus 10 mM KCl in a variety of light treatments. The growth response of discs exposed to continuous white light (WL) for 16 h was saturated at 100 micromoles m-2 s-1, and did not show reciprocity. Extensive, but not continuous, illumination was needed for maximal growth. The wavelength dependence of disc expansion was determined from fluence-response curves obtained from 380 to 730 nm provided by the Okazaki Large Spectrograph. Blue (BL; 460 nm) and red light (RL; 660 nm) were most effective in promoting leaf cell growth, both in photosynthetically active and inhibited leaf discs. Far-red light (FR; 730 nm) reduced the effectiveness of RL, but not BL, indicating that phytochrome and a separate blue-light receptor mediate expansion of leaf cells.
Publication Date: Aug 01, 1990
Document ID:
20040090107
(Acquired Sep 07, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Planta; p. 77-80; (ISSN 0032-0935); Volume 182; 1
Publisher Information: Germany
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CYTOLOGY; LEAVES; LEGUMINOUS PLANTS; LIGHT (VISIBLE RADIATION); PHOTOPERIOD; PLANTS (BOTANY); CELL DIVISION; CULTURE MEDIA; EXOBIOLOGY; PHOTONS; PHYTOCHROME; POTASSIUM; POTASSIUM CHLORIDES; SUCROSE; TISSUE CULTURING; TISSUES (BIOLOGY)
Other Descriptors: FABACEAE/CYTOLOGY/GROWTH & DEVELOPMENT/RADIATION EFFECTS; LIGHT; PHOTOPERIOD; PLANT LEAVES/CYTOLOGY/GROWTH & DEVELOPMENT/RADIATION EFFECTS; PLANTS, MEDICINAL; CELL DIVISION/PHYSIOLOGY/RADIATION EFFECTS; CULTURE MEDIA; PHOTONS; PHYTOCHROME/RADIATION EFFECTS; POTASSIUM CHLORIDE; SUCROSE; SUPPORT, NON-U.S. GOV'T; TISSUE CULTURE; NASA DISCIPLINE NUMBER 29-20; NASA DISCIPLINE PLANT BIOLOGY; NASA PROGRAM SPACE BIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
› Back to Top
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 23, 2011
Contact Us