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
1975 ◽  
Vol 30 (11-12) ◽  
pp. 855-856 ◽  
Author(s):  
W. Mayer ◽  
I. Scherer

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.


1992 ◽  
Vol 47 (11-12) ◽  
pp. 925-928 ◽  
Author(s):  
Wolfgang Engelmann ◽  
Karl Simon ◽  
Chen Jyh Phen

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


2017 ◽  
Vol 114 (28) ◽  
pp. 7450-7455 ◽  
Author(s):  
Chrysoula K. Pantazopoulou ◽  
Franca J. Bongers ◽  
Jesse J. Küpers ◽  
Emilie Reinen ◽  
Debatosh Das ◽  
...  

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.


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

2013 ◽  
Vol 14 (6) ◽  
pp. 11527-11543 ◽  
Author(s):  
Punyakishore Maibam ◽  
Ganesh Nawkar ◽  
Joung Park ◽  
Vaidurya Sahi ◽  
Sang Lee ◽  
...  

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 436E-436
Author(s):  
Teresa A. Cerny ◽  
Nihal C. Rajapakse ◽  
Ryu Oi

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.


Author(s):  
A P Nugroho ◽  
S Maghfiroh ◽  
D Fatmawati ◽  
G P Edwantiar ◽  
L Sutiarso ◽  
...  

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