Abstract
The effect of arsenate, arsenite, 2,4-dinitrophenol, and anaerobiosis on early events in seed germination was investigated using both intact and punched seeds of lettuce (Lactuca sativa L.). It was found that punching the seed removes penetration barriers to the entrance of inhibitors without an undue loss of germination or light responses. The kinetics of the action of germination inhibitors were established by 2-hour pulse experiments. Arsenate and 2, 4-dinitrophenol have very different kinetics. The inhibition of germination in punched seeds by arsenate given in conjunction with phosphate compared with the lack of inhibition of arsenate plus phosphate on the growing seedling, suggest a distinct metabolic change in the germinating embryo at some time between the onset of germination and subsequent seedling growth.
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Claims 5
Claim · model-written summary
Punching lettuce seeds removed penetration barriers without undue germination or light response loss.
- Taxon
- lettuce
Lactuca sativat0 - Organ / stage
- seede0
- Treatment
- punching the seede0
- Outcome
- penetration barriers to the entrance of inhibitorse0
- Direction
- removese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“punching the seed removes penetration barriers to the entrance of inhibitors without an undue loss of germination or light responses”
t0“Lettuce Seeds”
Claim · model-written summary
Arsenate and 2,4-dinitrophenol had different action kinetics.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Arsenatee0
- Outcome
- very different kineticse0
- Comparator
- 2, 4-dinitrophenole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arsenate and 2, 4-dinitrophenol have very different kinetics”
t0“Lettuce Seeds”
Claim · model-written summary
Arsenate with phosphate inhibited germination in punched lettuce seeds.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- punched seedse0
- Treatment
- arsenate given in conjunction with phosphatee0
- Outcome
- germinatione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of germination in punched seeds by arsenate given in conjunction with phosphate”
t0“Lettuce Seeds”
Claim · model-written summary
Arsenate plus phosphate did not inhibit the growing seedling.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- growing seedlinge0
- Treatment
- arsenate plus phosphatee0
- Outcome
- inhibitione0
- Direction
- lack of inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lack of inhibition of arsenate plus phosphate on the growing seedling”
t0“Lettuce Seeds”
Claim · model-written summary
The contrasting arsenate responses suggest a metabolic change between germination onset and seedling growth.
- Taxon
- lettuceLactuca sativat0
- Organ / stage
- germinating embryoe0
- Outcome
- distinct metabolic changee0
- Qualifier
- at some time between the onset of germination and subsequent seedling growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggest a distinct metabolic change in the germinating embryo at some time between the onset of germination and subsequent seedling growth”
t0“Lettuce Seeds”
The same questions in other papers
phosphorus · growth · Lactuca sativa (garden lettuce)Positive and negative results
5 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →phosphorus · disease · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- no effect
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.