Abstract
Detailed action spectra for photoinduction and photoinactivation of germination of the crucifer, Arabidopsis thaliana, have been determined. The photoresponse has a typical red, far-red sensitivity with a peak susceptivity for induction at 660 mμ and two maxima at 720 and 740 mμ for inactivation. The response curve for induction is a logarithmic function of dose and for inactivation a linear function of dose. The close similarity of the action spectra with other photomorphogenic action spectra in diverse plant tissues indicates that there is little attenuation by screening pigments or scattering before the photoreceptor is reached. The low dark germination percentage and the reproducible light sensitivity make the system advantageous for the study of photoimetic substances.
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Claims 7
Claim · model-written summary
Arabidopsis germination induction was most susceptible at 660 mμ.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Outcome
- susceptivity for inductione1
- Direction
- peake1
- Value
- 660 mμe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the crucifer, Arabidopsis thaliana”
e1“peak susceptivity for induction at 660 mμ”
Claim · model-written summary
Germination inactivation had maxima at 720 and 740 mμ.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Outcome
- maxima at 720 and 740 mμ for inactivatione1
- Direction
- maximae1
- Value
- 720 and 740 mμe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the crucifer, Arabidopsis thaliana”
e1“two maxima at 720 and 740 mμ for inactivation”
Claim · model-written summary
The germination-induction response is a logarithmic function of dose.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- dosee1
- Outcome
- response curve for inductione1
- Qualifier
- logarithmic function of dosee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana”
e1“The response curve for induction is a logarithmic function of dose”
Claim · model-written summary
The germination-inactivation response is a linear function of dose.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- dosee1
- Outcome
- inactivatione1
- Qualifier
- linear function of dosee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana”
e1“for inactivation a linear function of dose”
Claim · model-written summary
The action spectra resemble other plant photomorphogenic action spectra.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Outcome
- close similarity of the action spectrae1
- Comparator
- other photomorphogenic action spectra in diverse plant tissuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana”
e1“The close similarity of the action spectra with other photomorphogenic action spectra in diverse plant tissues”
Claim · model-written summary
The authors infer little attenuation by screening pigments or scattering before light reaches the photoreceptor.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Outcome
- little attenuatione1
- Qualifier
- screening pigments or scattering before the photoreceptor is reachede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana”
e1“there is little attenuation by screening pigments or scattering before the photoreceptor is reached”
Claim · model-written summary
Low dark germination and reproducible light sensitivity make the system useful for studying photoimetic substances.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Outcome
- advantageous for the study of photoimetic substancese1
- Qualifier
- reproducible light sensitivitye1
- Comparator
- darke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana”
e1“The low dark germination percentage and the reproducible light sensitivity make the system advantageous for the study of photoimetic substances.”