Transcriptomic and proteomic analyses of far-red light effects in inducing shoot elongation in the presence or absence of paclobutrazol in Chinese pine

2021 ◽  
Author(s):  
Yingtian Guo ◽  
Shihui Niu ◽  
Yousry A. El-Kassaby ◽  
Wei Li
Keyword(s):  
Red Light ◽  
Shoot Elongation ◽  
Chinese Pine ◽  
Light Effects ◽  
Proteomic Analyses

scholarly journals Light Gradient-Based Screening of Arabidopsis thaliana on a 384-Well Type Plant Array Chip

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 191
Author(s):  
Youn-Hee Park ◽  
Je-Kyun Park
Keyword(s):  
Arabidopsis Thaliana ◽  
White Light ◽  
Solid Medium ◽  
Red Light ◽  
Phytochrome B ◽  
Wild Type ◽  
Light Gradient ◽  
Gradient Based ◽  
Light Effects ◽  
Germination And Growth

Arabidopsis thaliana (Arabidopsis), as a model for plant research, is widely used for various aspects of plant science. To provide a more sophisticated and microscopic environment for the germination and growth of Arabidopsis, we report a 384-well type plant array chip in which each Arabidopsis seed is independently seeded in a solid medium. The plant array chip is made of a poly(methyl methacrylate) (PMMA) acrylic material and is assembled with a home-made light gradient module to investigate the light effects that significantly affect the germination and growth of Arabidopsis. The light gradient module was used to observe the growth pattern of seedlings according to the intensity of the white light and to efficiently screen for the influence of the white light. To investigate the response to red light (600 nm), which stimulates seed germination, the light gradient module was also applied to the germination test. As a result, the germination results showed that the plant array chip can be used to simultaneously screen wild type seeds and phytochrome B mutant seeds on a single array chip according to the eight red light intensities.

Red and Far‐Red Light Effects on Climbing in Phaseolus vulgaris L. 1

Crop Science ◽  
1977 ◽  
Vol 17 (5) ◽  
pp. 797-799 ◽  
Author(s):  
Paul J. Kretchmer ◽  
J. L. Ozbun ◽  
Stuart L. Kaplan ◽  
D. R. Laing ◽  
D. H. Wallace
Keyword(s):  
Phaseolus Vulgaris ◽  
Red Light ◽  
Phaseolus Vulgaris L ◽  
Light Effects

Die Wirkung von Phytochrom auf die Bildung von Einzelcarotinoiden in etiolierten Horde um -Keimlingen / The Influence of Phytochrome on the Formation of Individual Carotenoids in Etiolated Hordeum Seedlings

1975 ◽  
Vol 30 (1-2) ◽  
pp. 67-68 ◽  
Author(s):  
Hans K. Kleudgen ◽  
Hartmut K. Lichtenthaler
Keyword(s):  
White Light ◽  
Accumulation Rate ◽  
Red Light ◽  
Light Treatment ◽  
Light Effects ◽  
Short Time ◽  
Β Carotene

Abstract Short time red pulses, given 6 times for 5 min within 36 h, induce in etiolated barley seedlings an enhanced synthesis of the main chloroplast carotenoids β-carotene, violaxanthine, lutein and neoxanthine. The level of antheraxanthine and zeaxanthine decreases by red light treatment. These red light effects are reverted by subsequent short time far-red pulses. The results show that the white light induced change in the accumulation rate of individual carotenoids is initiated and regulated by active phytochrome Pfr . In the case of neoxanthin and zeaxanthin the red light effects cannot be fully reverted by far-red; this points to very fast phytochrome reaction.

Qualitative Analysis of Therapeutic Light Effects on Global Function in Alzheimer’s Disease

2010 ◽  
Vol 33 (7) ◽  
pp. 933-952 ◽  
Author(s):  
LuAnn Nowak ◽  
Jean Davis
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Qualitative Analysis ◽  
Repeated Measures ◽  
Red Light ◽  
Global Function ◽  
Duration Of Effect ◽  
Disturbed Sleep ◽  
Light Effects ◽  
Effect Of Light

The occurrence of Alzheimer’s disease (AD) is growing, with 68% of cases occurring in women. Declines in global function exacerbated by reversal of day–night patterns, disturbed sleep–wake rhythms, and excessive daytime sleepiness make managing AD difficult. In this study, the authors examined the effect and duration of effect of therapeutic light on sleep, rest–activity, and global function in women with AD using mixed methods in a two-group experimental design with repeated measures on one factor. Twenty women with AD were randomized to experimental or control conditions. Blue-green or dim red light was delivered via cap visor in the morning. Results of the qualitative analysis of serial interviews with family and facility caregivers regarding perceived effect of light on global function are presented. Themes emerged in both groups with respect to cognition and psychosocial function. Future studies with larger samples using quantitative measures of global function are warranted to verify findings.

Control by Light Quality of Chlorophyll Synthesis in the Brown Alga Desmarestia aculeata

1991 ◽  
Vol 46 (7-8) ◽  
pp. 542-548 ◽  
Author(s):  
F. López-Figueroa
Keyword(s):  
Blue Light ◽  
Light Quality ◽  
Red Light ◽  
Green Light ◽  
Chlorophyll Synthesis ◽  
Natural Conditions ◽  
Light Pulses ◽  
Light Effects ◽  
Starvation Conditions

Abstract The chlorophyll synthesis in the brown algae Desmarestia aculeata is affected by light quality and by the nutrient state in the medium before the illumination. Pulses of 5 min of red, green and blue light together with 200 μM nitrate in plants growing under natural conditions deter­ mined similar induction of chlorophyll synthesis. However, when the plants were incubated previously under starvation conditions the light effect was different. The induction of chlorophyll synthesis was greater after blue and green light than after red light pulses. Red-light photoreceptor was only involved in the chlorophyll synthesis under no nutrient limitations and under starvation conditions after previous illumination with blue light followed by far-red light. The induction of chlorophyll synthesis by green and blue light pulses applied together with nitrate was greater when the algae were incubated in starvation conditions than in natural conditions (normal nutrient state). Because all light effects were partially reversed by far-red light the involvement of a phyto-chrome-like photoreceptor is proposed. In addition, a coaction between blue-and a green-light photoreceptors and phytochrome is suggested.

Red Light Effects on Blue Light–Based Phototropism in Roots of Arabidopsis thaliana

2014 ◽  
Vol 175 (6) ◽  
pp. 731-740 ◽  
Author(s):  
Timothy J. Sindelar ◽  
Katherine D. L. Millar ◽  
John Z. Kiss
Keyword(s):  
Arabidopsis Thaliana ◽  
Blue Light ◽  
Red Light ◽  
Light Effects

scholarly journals Similarity of Some Kinetin and Red Light Effects.

1956 ◽  
Vol 31 (4) ◽  
pp. 318-319 ◽  
Author(s):  
Carlos O. Miller
Keyword(s):  
Red Light ◽  
Light Effects

scholarly journals Development of soybean somatic embryos under different light spectra

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Anastasiya V. Micheeva ◽  
◽  
Olga V. Nakonechnaya ◽  
Evgeniy P Subbotin ◽  
Olga V. Grishchenko ◽  
...  
Keyword(s):  
Somatic Embryos ◽  
Red Light ◽  
Shoot Elongation ◽  
Lower Growth ◽  
Full Spectrum ◽  
Light Emitting ◽  
Light Spectra ◽  
Fluorescent Lamps ◽  
Glycine Max L ◽  
Led Lights

Soybean (Glycine max (L.) Merr. cv. 'Primorskaya 28') plantlet development from somatic embryos (embryoids) under different spectra was studied. Light irradiation with intensity of 48 μmol/(m2·s) was generated by LEDs (light emitting diodes) with various spectra: cold white (CW), white (W), warm white (WW), full spectrum (FS, 450 nm and 660 nm), red (R, 630 nm), blue (B, 440 nm), and sun box (SB, close to the sun spectrum at wavelength range 440–660 nm). Fluorescent lamps were used as a control illumination (K). Our results showed that experimental LED lights with different spectra possessed the potential to positively affect the development of soybean plantlets from embryoid phase to a full-fledged plantlet, ready to be transferred into soil. The best effect was observed for the FS, which provided development of the highest plantlets. SB light was promising after one month of cultivation, but provided no significant differences in plantlets growth at the end of the experiment. A tendency to the lower growth was observed for plantlets under CW, W, WW, and K. Red light did not provide notable shoot elongation, as was supposed to. Investigations will be continued to clarify and refine the obtained data on the effect of light spectra on soybean plantlet development from embryoids.

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