scholarly journals Effects of Light Quality on the Circadian Rhythm of Leaf Movement of a Short-Day-Plant

1969 ◽  
Vol 44 (7) ◽  
pp. 973-977 ◽  
Author(s):  
Ruth Halaban
Keyword(s):  
Circadian Rhythm ◽  
Light Quality ◽  
Leaf Movement ◽  
Short Day

Phase Shifting Effect of Caffeine in the Circadian Rhythm of Phaseolus coccineus L

1975 ◽  
Vol 30 (11-12) ◽  
pp. 855-856 ◽  
Author(s):  
W. Mayer ◽  
I. Scherer
Keyword(s):  
Circadian Rhythm ◽  
Phaseolus Coccineus ◽  
Phase Shifting ◽  
Leaf Movement ◽  
Circadian Leaf Movement

Abstract Caffeine, Circadian Rhythm, Sleep and Wakefulness, Phaseolus coccineus L. 4-hour caffeine pulses (10 mᴍ) offered via the trans­ piration stream advances or delays the phase of the circadian leaf movement rhythm of Phaseolus coccineus as a function of the phase of application. It is hypothesized that the caffeine effect upon sleep and wakefulness in man is partly due to this phase-shifting effect.

Leaf Movement Rhythm In Arabidopsis Thaliana

1992 ◽  
Vol 47 (11-12) ◽  
pp. 925-928 ◽  
Author(s):  
Wolfgang Engelmann ◽  
Karl Simon ◽  
Chen Jyh Phen
Keyword(s):  
Arabidopsis Thaliana ◽  
Circadian Rhythm ◽  
Computer System ◽  
Leaf Movement ◽  
Leaf Movements ◽  
Weak Light

A circadian rhythm of leaf movements of Arabidopsis thaliana and its recording in continuous weak light with a video-computer system is described

scholarly journals Neighbor detection at the leaf tip adaptively regulates upward leaf movement through spatial auxin dynamics

2017 ◽  
Vol 114 (28) ◽  
pp. 7450-7455 ◽  
Author(s):  
Chrysoula K. Pantazopoulou ◽  
Franca J. Bongers ◽  
Jesse J. Küpers ◽  
Emilie Reinen ◽  
Debatosh Das ◽  
...  
Keyword(s):  
3D Modeling ◽  
Light Quality ◽  
Red Light ◽  
Plant Performance ◽  
Leaf Movement ◽  
Heterogeneous Distribution ◽  
Spatial Coordination ◽  
Competitive Success ◽  
Organ Level ◽  
Local Signaling

Vegetation stands have a heterogeneous distribution of light quality, including the red/far-red light ratio (R/FR) that informs plants about proximity of neighbors. Adequate responses to changes in R/FR are important for competitive success. How the detection and response to R/FR are spatially linked and how this spatial coordination between detection and response affects plant performance remains unresolved. We show in Arabidopsis thaliana and Brassica nigra that localized FR enrichment at the lamina tip induces upward leaf movement (hyponasty) from the petiole base. Using a combination of organ-level transcriptome analysis, molecular reporters, and physiology, we show that PIF-dependent spatial auxin dynamics are key to this remote response to localized FR enrichment. Using computational 3D modeling, we show that remote signaling of R/FR for hyponasty has an adaptive advantage over local signaling in the petiole, because it optimizes the timing of leaf movement in response to neighbors and prevents hyponasty caused by self-shading.

Day light quality affects the night-break response in the short-day plant chrysanthemum, suggesting differential phytochrome-mediated regulation of flowering

2012 ◽  
Vol 169 (18) ◽  
pp. 1789-1796 ◽  
Author(s):  
Yohei Higuchi ◽  
Katsuhiko Sumitomo ◽  
Atsushi Oda ◽  
Hiroshi Shimizu ◽  
Tamotsu Hisamatsu
Keyword(s):  
Light Quality ◽  
Short Day

scholarly journals The Influence of Light Quality, Circadian Rhythm, and Photoperiod on the CBF-Mediated Freezing Tolerance

2013 ◽  
Vol 14 (6) ◽  
pp. 11527-11543 ◽  
Author(s):  
Punyakishore Maibam ◽  
Ganesh Nawkar ◽  
Joung Park ◽  
Vaidurya Sahi ◽  
Sang Lee ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Freezing Tolerance ◽  
Light Quality

scholarly journals 263 Photoselective Films Influence Flowering of Photoperiodic Species

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 436E-436
Author(s):  
Teresa A. Cerny ◽  
Nihal C. Rajapakse ◽  
Ryu Oi
Keyword(s):  
Plant Species ◽  
Light Quality ◽  
Red Light ◽  
Photon Flux ◽  
Crop Species ◽  
Plastic Films ◽  
Spectral Filters ◽  
Short Day ◽  
Long Day ◽  
Air Temperatures

Growth chambers constructed from photoselective plastic films were used to investigate the effects of light quality on height manipulation and flowering of photoperiodic plant species. Three types of treatment films were used; control, a far-red light intercepting film (YXE-10) and a red light intercepting film (SXE-4). The red (600-700 nm):far-red (700-800 nm) ratios and phytochrome photoequilibrium estimates for the control, YXE-10 and SXE-4 films were 1.0 and 0.71, 1.5 and 0.77, and 0.71 and 0.67, respectively. The photosynthetic photon flux was adjusted to uniformity among chambers using neutral density filters. Spectral filters did not effect minimum and maximum air temperatures. Experiments were conducted using quantitative long day (Antirrhinum majus and Petunia × hybrida), quantitative short day (Zinnia elegans and Dendranthema × grandiflorum) and day-neutral (Rosa × hydrida) plant species under natural short-day conditions. Plants produced under the YXE-10 filters were significantly shorter than the control plants, while plants produced under the SXE-4 films had similar or increased height compared to the control plants. However, both height response and flowering times varied with the crop species. Flowering time of Rosa × hybrida plants was uniform among all treatments. Flowering of quantitative long-day plants was delayed by at least 10 days under the YXE-10 film and was most responsive to the filtered light. Flowering of quantitative short-day plants was delayed by 2 days under the YXE-10. Days to flower for plants produced under the SXE-4 film were similar to the control plants for all species tested.

scholarly journals Quantification of leaf movement to study the circadian rhythm using the optical flow

2020 ◽  
Vol 542 ◽  
pp. 012066
Author(s):  
A P Nugroho ◽  
S Maghfiroh ◽  
D Fatmawati ◽  
G P Edwantiar ◽  
L Sutiarso ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Optical Flow ◽  
Leaf Movement
Sign in / Sign up

Export Citation Format

Share Document