The effect of cis-4-Cyclohexene-1, 2-dicarboximide on lettuce seed germination
Year: 1987
Type: dissertation
Abstract: cis-4-Cyclohexene-1,2-dicarboximide (CHDC), a compound isolated from the fruit of Beta vulgaris L. (sugar beet), has been reported to be a Specific inhibitor of Pgy action in phytochrome mediated germination in a number of species, including lettuce. As temperature increases germination levels in lLactuca Sativa (lettuce) and many other species drop sharply from near maximum (approx. 100%) to near zero over a 2-3 0 band well below lethal temperatures. The temperature at which germination is lowered to 50% is termed the GT₅₀. Germination inhibitors act by shifting the GT₅₀ downwards, while germination promoters, such as R, raise the GT₅₀. My germination trials, conducted on two cultivars of lettuce, Paris Island and Grand Rapids, over a range of temperatures from 13 to 37 °%: show that CHDC acts by lowering the GTs5q both in the dark ana following R. In the presence of CHDC, the GT₅₀ light remains above the GT₅₀ dark. Thus, Pfr action raises the GT₅₀ even in the presence of CHDC. The inhibition is totally reversed by treatment with BA and R, and partially relieved by treatment with BA alone. Therefore, the effect of CHDC is not a specific inhibition of phytochrome action. Its action is similar to that of various other germination inhibitors, such as ABA, which shift the GT₅₀ downwards.
Source: AcadiaU-DEV
DOI: 10.26108/6m1g-7v72
Author: Campbell, Douglas Andrew
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W7109958643