Claim · model-written summary
Movement of light through large angles produced leaflet re-orientation proportional to, but less than, the change in light angle.
- Taxon
- Macroptilium atropurpureum
Macroptilium atropurpureumt0 - Treatment
- Movement of a light through large anglese1
- Outcome
- leaflet re-orientatione1
- Direction
- less thane1
- Qualifier
- proportional to, but less than, the change in angle of the lighte1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Movement of a light through large angles resulted in leaflet re-orientation proportional to, but less than, the change in angle of the light”
t0“Macroptilium atropurpureum cv. Siratro”
Title
Diaheliotropic Responses of Leaves of Macroptilium atropurpureum cv. Siratro
DW Sheriff; MM Ludlow Australian Journal of Plant Physiology 1985. doi:10.1071/pp9850151
Other claims from this paper (15)
- Intervention effect Secondary pulvini flexed more in response to light than primary pulvini.
- Intervention effect Blue light caused the illuminated side of the pulvinus to contract.
- Intervention effect Blue light reoriented the leaflet so that its adaxial surface faced the light.
- Intervention effect A light gradient along the illuminated surface of the pulvinus enhanced the leaf response to light.
- Intervention effect Additional low-intensity diffuse light enhanced the leaf response to light.
- Intervention effect A photon irradiance greater than 0.5 mmol m-2 s-1 enhanced the leaf response to light.
- Intervention effect A change of photon irradiance enhanced the leaf response to light.
- Intervention effect The abaxial surface of the pulvinus was more sensitive to light than its adaxial surface.
- Observation A stimulus from an illuminated primary pulvinus to shaded secondary pulvini of the same leaf caused re-orientation of individual leaflets and the whole leaf.
- Observation A stimulus from illuminated secondary pulvini or the adjacent petiole to the primary pulvinus caused deflection of the petiole and re-orientation of the whole leaf toward the light.
- Observation Secondary pulvini move individual leaflets in three dimensions.
- Observation Terminal leaflets showed greater three-dimensional movement than lateral leaflets.
- Observation Secondary pulvini caused leaflets to track, though imperfectly, a light source simulating the sun.
- Mechanism A circumnutational circadian rhythm is partly responsible for the diaheliotropic movements of Siratro leaves outdoors.
- Association A leaflet ability to track the sun depends on its orientation with respect to the sun.