Abstract
Experiments with Salvia occidentalis (SDP) and Hyoscyamus niger (LDP) demonstrated that at least two photoperiodic reactions are involved in the process leading to a long-day effect. The main-light-period reaction is more sensitive to near infra-red and blue light than to red or green light. The effect of near infra-red and blue light can be antagonized by red light. The nightbreak reaction, promoted by red light, is nullified by a relatively short exposure to near infra-red or blue light. Experiments with various plant species on the elongation of internodes have shown that at relatively low intensities red light is more inhibitive than blue light. At relatively high intensities blue light is the most inhibiting spectral region. The inhibiting effect of red light on the elongation of hypocotyls of light-grown gherkin seedlings is antagonized by a subsequent exposure to near infra-red or blue light. The inhibiting effect of red light on the hypocotyl of dark-grown gherkin seedlings is much more pronounced when the seedlings are pre-irradiated with white or blue light.
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Claims 8
Claim · model-written summary
At least two photoperiodic reactions contribute to the long day effect.
- Taxon
- Salvia occidentalis
Salvia occidentalise0 - Outcome
- photoperiodic reactionse0
- Value
- at least twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments with Salvia occidentalis (SDP) and Hyoscyamus niger (LDP) demonstrated that at least two photoperiodic reactions are involved in the process leading to a long-day effect.”
Claim · model-written summary
The main light period reaction was more sensitive to near infrared and blue than red or green light.
- Taxon
- Salvia occidentalisSalvia occidentalist0
- Treatment
- near infra-red and blue lighte0
- Outcome
- main-light-period reactione0
- Direction
- more sensitivee0
- Comparator
- red or green lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main-light-period reaction is more sensitive to near infra-red and blue light than to red or green light.”
t0“Experiments with Salvia occidentalis (SDP) and Hyoscyamus niger (LDP)”
Claim · model-written summary
Red light antagonized the near infrared and blue light effect.
- Taxon
- Salvia occidentalisSalvia occidentalist0
- Treatment
- red lighte0
- Outcome
- effect of near infra-red and blue lighte0
- Direction
- antagonizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of near infra-red and blue light can be antagonized by red light.”
t0“Experiments with Salvia occidentalis (SDP) and Hyoscyamus niger (LDP)”
Claim · model-written summary
Near infrared or blue exposure nullified the red promoted night break reaction.
- Taxon
- Hyoscyamus niger
%2C_White_Cap_Mine_Black_Hills%2C_South_Dakota.jpg?width=60)
Hyoscyamus nigert0 - Treatment
- near infra-red or blue lighte0
- Outcome
- nightbreak reactione0
- Direction
- nullifiede0
- Comparator
- red lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_White_Cap_Mine_Black_Hills%2C_South_Dakota.jpg?width=500)
Verbatim
e0“The nightbreak reaction, promoted by red light, is nullified by a relatively short exposure to near infra-red or blue light.”
t0“Experiments with Salvia occidentalis (SDP) and Hyoscyamus niger (LDP)”
Claim · model-written summary
At low intensities red light inhibited internode elongation more than blue light.
Verbatim
e0“at relatively low intensities red light is more inhibitive than blue light.”
t0“Experiments with various plant species on the elongation of internodes”
Claim · model-written summary
At high intensities blue light inhibited elongation most.
- Taxon
- various plant speciest0
- Treatment
- blue lighte0
- Outcome
- elongation of internodest0
- Direction
- most inhibitinge0
- Qualifier
- relatively high intensitiese0
Not reportedComparator
Verbatim
e0“At relatively high intensities blue light is the most inhibiting spectral region.”
t0“Experiments with various plant species on the elongation of internodes”
Claim · model-written summary
Near infrared or blue exposure antagonized red light inhibition of hypocotyl elongation in light grown gherkin.
- Organ / stage
- hypocotylse0
- Treatment
- near infra-red or blue lighte0
- Outcome
- elongation of hypocotylse0
- Direction
- antagonizede0
- Comparator
- red lighte0
CucumisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibiting effect of red light on the elongation of hypocotyls of light-grown gherkin seedlings is antagonized by a subsequent exposure to near infra-red or blue light.”
Claim · model-written summary
White or blue pre irradiation made red inhibition of dark grown gherkin hypocotyls stronger.
- Organ / stage
- hypocotyle0
- Treatment
- pre-irradiated with white or blue lighte0
- Outcome
- inhibiting effect of red light on the hypocotyle0
- Direction
- much more pronouncede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibiting effect of red light on the hypocotyl of dark-grown gherkin seedlings is much more pronounced when the seedlings are pre-irradiated with white or blue light.”