Year: 1975
Type: article
Abstract: Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition. In 48 hr at 30 C a GA(3)-treated segment more than doubles while a control segment elongates less than 50%. Auxin has no detectable effect on this system. Sensitivity to GA(3) is not decreased by apex or root removal. Of the experimental variables tested, temperature, sucrose, and preincubation in water affect growth both with and without GA(3). Blue and far red light inhibit growth without GA(3); this inhibition is reversed by GA(3). Potassium chloride stimulates growth of illuminated sections treated with GA(3) but has no effect on control growth. When sections are incubated in the dark, KCl has a promotive effect on elongation.
Source: PLANT PHYSIOLOGY
DOI: 10.1104/pp.56.2.267
Authors: Wendy Kuhn Silk, Russell L. Jones
Institution: University of California, Berkeley
Language: English
Topic: Light effects on plants
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
Funder: National Science Foundation
OpenAlex ID: W2057501611