Abstract
Corn seedlings were grown in white light in the absence and presence of the chlorosis-inducing herbicide San 9789. The resulting green and achlorophyllous seedlings were used to investigate phytochrome-mediated responses to end-of-day far red irradiation and reversal of these responses by subsequent red irradiation. Mesocotyl and coleoptile elongation increased in response to end-of-day far red irradiation, whereas the anthocyanin content of the coleoptiles was decreased. All three responses were reversible by red irradiation following the far red. Dose-response curves for far red induction and red reversal of these responses did not differ significantly for plants grown in the presence or absence of San 9789. Thus, San 9789 appears to affect neither phytochrome itself nor the response system involved. Chlorophyll screening likewise does not affect phytochrome relationships for these responses.
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Claims 7
Claim · model-written summary
End-of-day far-red irradiation increased corn mesocotyl elongation.
- Taxon
- Corn seedlings
Zea mays subsp. mayse1 - Organ / stage
- Mesocotyle0
- Treatment
- end-of-day far red irradiatione0
- Outcome
- Mesocotyl and coleoptile elongatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesocotyl and coleoptile elongation increased in response to end-of-day far red irradiation”
e1“Corn seedlings were grown in white light”
Claim · model-written summary
End-of-day far-red irradiation increased corn coleoptile elongation.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- coleoptilee0
- Treatment
- end-of-day far red irradiatione0
- Outcome
- coleoptile elongatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesocotyl and coleoptile elongation increased in response to end-of-day far red irradiation”
t0“Corn”
Claim · model-written summary
End-of-day far-red irradiation decreased anthocyanin content of corn coleoptiles.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- coleoptilese0
- Treatment
- end-of-day far red irradiatione1
- Outcome
- anthocyanin content of the coleoptilese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the anthocyanin content of the coleoptiles was decreased”
e1“responses to end-of-day far red irradiation and reversal of these responses by subsequent red irradiation”
t0“Corn”
Claim · model-written summary
Subsequent red irradiation reversed all three far-red responses in corn seedlings.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- red irradiation following the far rede0
- Outcome
- All three responses were reversiblee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All three responses were reversible by red irradiation following the far red.”
t0“Corn”
Claim · model-written summary
Far-red induction and red reversal dose-response curves did not differ significantly between corn plants grown with or without San 9789.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- presence or absence of San 9789e0
- Outcome
- Dose-response curves for far red induction and red reversale0
- Direction
- did not differe0
- Comparator
- absence of San 9789e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dose-response curves for far red induction and red reversal of these responses did not differ significantly for plants grown in the presence or absence of San 9789.”
t0“Corn”
Claim · model-written summary
The authors infer that San 9789 does not affect phytochrome or the response system in corn.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- San 9789e0
- Outcome
- phytochrome itself nor the response systeme0
- Direction
- neithere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“San 9789 appears to affect neither phytochrome itself nor the response system involved.”
t0“Corn”
Claim · model-written summary
Chlorophyll screening was inferred not to affect corn phytochrome relationships for these responses.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- phytochrome relationships for these responsese0
- Direction
- does not affecte0
- Qualifier
- Chlorophyll screeninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll screening likewise does not affect phytochrome relationships for these responses.”
t0“Corn”
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