PHOTOMORPHOGENIC GROWTH OF WATERMELON AS INFLUENCED BY LIGHT TRANSMISSION THROUGH ROW COVER MATERIALS

Alterations in spectral distribution as affected by selective light transmission of row cover materials were evaluated for effects on early watermelon (Citrullus lanatus cv. Sugar Baby) growth and development. Selected commercially available row covers were analyzed for light transmission properties. Results suggest that row cover materials function as selective light filters and influence parameters of light that can affect plant morphogenesis. Clear polyethylene row covers caused little variation in transmitted PAR (photosynthetically active radiation) and photomorphogenic light (FR/R and blue light). White polyethylene row covers decreased the transmitted PAR and blue light but had no effect on the FR/R ratio. Watermelon plants grown under a white polyethylene row cover with a greater FR/R ratio of light were taller (longer stems) and had longer petioles than plants grown under a clear polyethylene row cover with a smaller transmitted FR/R ratio.

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Dependence of resonant light transmission properties of a subwavelength slit on structural parameters

Optics Express ◽

10.1364/oe.17.011026 ◽

2009 ◽

Vol 17 (13) ◽

pp. 11026 ◽

Cited By ~ 4

Author(s):

K. Lindfors ◽

L. Lechner ◽

M. Kaivola

Keyword(s):

Light Transmission ◽

Structural Parameters ◽

Transmission Properties ◽

Subwavelength Slit

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Universal off-axis light transmission properties of the bright state in perfectly compensated liquid crystal devices

Journal of Applied Physics ◽

10.1063/1.2751113 ◽

2007 ◽

Vol 102 (1) ◽

pp. 013101 ◽

Cited By ~ 2

Author(s):

Yong-Kyu Jang ◽

Philip Bos

Keyword(s):

Liquid Crystal ◽

Light Transmission ◽

Liquid Crystal Devices ◽

Transmission Properties ◽

Axis Light

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Identification and expression of the trehalose-6-phosphate synthase gene family members in tomato exposed to different light spectra

Archives of Biological Sciences ◽

10.2298/abs160325082c ◽

2017 ◽

Vol 69 (1) ◽

pp. 93-101

Author(s):

Zexiong Chen ◽

Juan Lou

Keyword(s):

Plant Growth ◽

Blue Light ◽

White Light ◽

Growth And Development ◽

Light Quality ◽

Red Light ◽

Floral Transition ◽

Stem Length ◽

Pcr Analysis ◽

Phosphate Synthase

Light is the source of energy for plants. Light wavelengths, densities and irradiation periods act as signals directing morphological and physiological characteristics during plant growth and development. To evaluate the effects of light wavelengths on tomato growth and development, Solanum lycopersicum (cv. micro-Tom) seedlings were exposed to different light-quality environments, including white light and red light supplemented with blue light (at ratios of 3:1 and 8;1, respectively). Tomatoes grown under red light supplemented with blue light displayed significantly shorter stem length, a higher number of flower buds and rate of fruit set, but an extremely late flowering compared to white-light-grown plants. To illustrate the mechanism underlying the inhibition of stem growth and floral transition mediated by red/blue light, 10 trehalose-6-phosphate synthase (TPS) genes were identified in tomato, and bioinformatics analysis was performed. qRT-PCR analysis showed that SlTPSs were expressed widely throughout plant development and SlTPS1 was expressed at extremely high levels in stems and buds. Further analysis of several flowering-associated genes and microRNAs showed that the expressions of SlTPS1, SlFT and miR172 were significantly downregulated in tomato grown under red and blue light compared with those grown under white light, whereas miR156 transcript levels were increased. A regulatory model underlying vegetative growth and floral transition regulated by light qualities is presented. Our data provide evidence that light quality strongly affects plant growth and phase transition, most likely via the TPS1-T6P signaling pathway.

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Evaluation of the Effect of LED-Lamp Spectral Content on the Development of Greenhouse Tomato

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.482 ◽

2016 ◽

Vol 685 ◽

pp. 482-486 ◽

Cited By ~ 1

Author(s):

Alexey N. Yakovlev ◽

S.B. Turanov ◽

I.N. Upadysheva ◽

V.I. Korepanov

Keyword(s):

Photosynthetically Active Radiation ◽

Growth And Development ◽

Growth Period ◽

Illumination Level ◽

Spectral Content ◽

Active Radiation ◽

Greenhouse Tomato ◽

Irradiation Unit ◽

Effective Development

The article reports the results of the experiment studied the effect of radiation spectral content (considering its equal intensity in terms of photosynthetically active radiation) on the growth and development of Boets greenhouse tomato breed. We have shown that the effective development of model subjects requires the adaptation of radiation spectral content depending on the growth period and type of a plant, unlike the illumination level. The obtained results demonstrate the necessity of creating an adaptive irradiation unit.

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Arabidopsis cryptochrome 1 is a soluble protein mediating blue light-dependent regulation of plant growth and development

The Plant Journal ◽

10.1046/j.1365-313x.1996.10050893.x ◽

1996 ◽

Vol 10 (5) ◽

pp. 893-902 ◽

Cited By ~ 106

Author(s):

Chentao Lin ◽

Margaret Ahmad ◽

Anthony R. Cashmore

Keyword(s):

Plant Growth ◽

Blue Light ◽

Soluble Protein ◽

Growth And Development ◽

Plant Growth And Development ◽

Cryptochrome 1

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Simulation of Competition for Photosynthetically Active Radiation Between Common Ragweed (Ambrosia artemisiifolia) and Dry Bean (Phaseolus vulgaris)

Weed Science ◽

10.1017/s0043174500094315 ◽

1996 ◽

Vol 44 (3) ◽

pp. 545-554 ◽

Cited By ~ 11

Author(s):

David Chikoye ◽

Leslie A. Hunt ◽

Clarence J. Swanton

Keyword(s):

Leaf Area ◽

Crop Yield ◽

Photosynthetically Active Radiation ◽

Growth And Development ◽

Field Studies ◽

Weed Competition ◽

Yield Losses ◽

Dry Bean ◽

Common Ragweed ◽

Active Radiation

The influence of weeds on crop yield is not only dependent on weed-related factors such as density and time of emergence, but also on environmental and management factors that affect both the weed and crop through time. This study was undertaken to develop the first physiologically based dry bean model that would account for the influence of weed competition. The specific objective was to develop a model that would account for the influence of weed competition on crop yield, and to use this model to test the hypothesis that crop yield losses resulted from competition for photosynthetically active radiation (PAR). To this end, a model that simulated the growth and development of dry bean was developed. The model performed daily calculations and simulated the phenology, leaf area expansion, dry matter production and distribution, and grain yield of dry bean based on weather and management information, but assumed adequate water and nutrients. The model was calibrated without weed competition at two locations and yr, and for these situations, adequately described the growth and development of the crop. Simulations were then run for five common ragweed densities and two times of emergence. Common ragweed leaf area was read into the model from input files and used to simulate weed shading. Shading of the dry bean canopy by common ragweed accounted for about 50 to 70% of the yield losses observed in field studies when weeds emerged with the crop. Weed shading did not account for the yield reduction measured from weeds that emerged at the second trifoliate stage of crop growth. The agreement between model predictions and field studies was consistent with the hypothesis that competition for PAR was a principal factor in weed-crop interaction. The ability to account for differences in weed densities, management, and environmental conditions suggested that modeling was a useful tool for evaluating the interaction among weeds and crops.

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Connected through the force: mechanical signals in plant development

Journal of Experimental Botany ◽

10.1093/jxb/erz103 ◽

2019 ◽

Vol 70 (14) ◽

pp. 3507-3519 ◽

Cited By ~ 7

Author(s):

Benoit Landrein ◽

Gwyneth Ingram

Keyword(s):

Gene Expression ◽

Plant Development ◽

Growth And Development ◽

Biological Processes ◽

Plant Morphogenesis ◽

Mechanical Signals ◽

Physical Forces ◽

Multicellular Organisms ◽

Biochemical Signals

Abstract As multicellular organisms, plants acquire characteristic shapes through a complex set of biological processes known as morphogenesis. Biochemical signalling underlies much of development, as it allows cells to acquire specific identities based on their position within tissues and organs. However, as growing physical structures, plants, and their constituent cells, also experience internal and external physical forces that can be perceived and can influence key processes such as growth, polarity, and gene expression. This process, which adds another layer of control to growth and development, has important implications for plant morphogenesis. This review provides an overview of recent research into the role of mechanical signals in plant development and aims to show how mechanical signalling can be used, in concert with biochemical signals, as a cue allowing cells and tissues to coordinate their behaviour and to add robustness to developmental processes.

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