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.
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Claims 7
Claim · model-written summary
CHDC lowered the germination GT₅₀ in dark and after red light.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- CHDCe0
- Outcome
- GTs5qe0
- Direction
- loweringe0
- Qualifier
- both in the dark ana following Re0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CHDC acts by lowering the GTs5q both in the dark ana following R”
t0“lettuce”
Claim · model-written summary
With CHDC, light GT₅₀ stayed above dark GT₅₀.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of CHDC, the GT₅₀ light remains above the GT₅₀ dark”
t0“lettuce”
Claim · model-written summary
Pfr raised GT₅₀ even with CHDC.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pfr action raises the GT₅₀ even in the presence of CHDC”
t0“lettuce”
Claim · model-written summary
BA plus red light fully reversed CHDC inhibition.
- Taxon
- lettuceLactuca sativat0
- Treatment
- BA and Re0
- Outcome
- inhibitione0
- Direction
- reversede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition is totally reversed by treatment with BA and R”
t0“lettuce”
Claim · model-written summary
BA alone partially relieved CHDC inhibition.
- Taxon
- lettuceLactuca sativat0
- Treatment
- BA alonee0
- Outcome
- relievede0
- Direction
- relievede0
- Qualifier
- partiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“partially relieved by treatment with BA alone”
t0“lettuce”
Claim · model-written summary
CHDC was concluded not to specifically inhibit phytochrome action.
- Taxon
- lettuceLactuca sativat0
- Treatment
- CHDCe0
- Outcome
- not a specific inhibition of phytochrome actione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of CHDC is not a specific inhibition of phytochrome action”
t0“lettuce”
Claim · model-written summary
CHDC action resembled ABA and other inhibitors that lower GT₅₀.
- Taxon
- lettuceLactuca sativat0
- Outcome
- GT₅₀e0
- Direction
- downwardse0
- Qualifier
- germination inhibitors, such as ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its action is similar to that of various other germination inhibitors, such as ABA, which shift the GT₅₀ downwards”
t0“lettuce”
The same questions in other papers
N-benzyladenine · disease · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.