Claim · model-written summary
Under light, the magnitude of circumnutation subsequently decreased.
- Taxon
- Helianthus annuus
Helianthus annuuse0 - Treatment
- under lighte1
- Outcome
- magnitudee1
- Direction
- decreasee1
Not reportedComparator
Verbatim
e0“three-week old Helianthus annuus in the 16:8 h light:dark photoperiod”
e1“Additionally, under light, there occurred a subsequent decrease in the magnitude, disturbance of circumnutation trajectory and, in some cases, changes in the direction of rotation”
Title
Complex relationship between growth and circumnutations inHelianthus annuusstem
Maria Stolarz; Elzbieta Krol; Halina Dziubinska; et al. Plant Signaling & Behavior 2008. doi:10.4161/psb.3.6.5714
Other claims from this paper (12)
- Intervention effect Circumnutation of sunflower stems was weak in the light stage compared with the dark stage, where it reached a high level.
- Intervention effect In the light stage, growth rate reached the same high level as in the dark stage.
- Intervention effect In the light stage, stem circumnutation was downregulated more strongly than growth.
- Intervention effect Switching off the light increased growth and circumnutation rate.
- Intervention effect Switching the light on caused an immediate transient decrease in growth rate.
- Intervention effect Switching the light on resulted in stem contraction.
- Intervention effect Switching the light on was accompanied by an almost complete pause of circumnutation.
- Intervention effect Under light, circumnutation trajectory was disturbed.
- Intervention effect Under light, the direction of rotation changed in some cases.
- Mechanism Stem contraction and disturbance of circumnutation imply turgor changes in the sunflower stem.
- Association Disturbances of growth rate are accompanied by changes in circumnutation parameters.
- Association There is no simple quantitative relation between growth rate and circumnutation rate.