Light Regulation and Biological Clocks

Millar, Andrew J.; Whitelam, Garry C.; Anderson, Brian D. O.; Roberts, Andrea

doi:10.1002/9781119312994.apr0010

Cited by 9 publications

(7 citation statements)

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“…Morphological and physiological characteristics of plants are strongly affected by the light intensity [ 13 , 15 – 17 , 30 , 31 ], colors ratio [ 32 , 33 ] and photoperiod [ 13 , 20 ]. In this research, the effects of these 3 factors on some morphological, physiological, and biochemical traits, and plants’ photosynthetic efficiency were studied to find out the best combination of light mode/s that can be optimal for rocket plants performance.…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic performance of rocket (Eruca sativa. Mill.) grown under different regimes of light intensity, quality, and photoperiod

et al. 2021

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In recent years, much effort has been devoted to understanding the response of plants to various light sources, largely due to advances in industry light-emitting diodes (LEDs). In this study, the effect of different light modes on rocket (Eruca sativa. Mill.) photosynthetic performance and other physiological traits was evaluated using an orthogonal design based on a combination between light intensity, quality, and photoperiod factors. Some morphological and biochemical parameters and photosynthetic efficiency of the plants were analyzed. Plants grew in a closed chamber where three light intensities (160, 190, and 220 μmol m-2 s-1) provided by LEDs with a combination of different ratios of red, green, and blue (R:G:B- 7:0:3, 3:0:7, and 5:2:3) and three different photoperiods (light/dark -10/14 h, 12/12 h, and 14/10 h) were used and compared with white fluorescent light (control). This experimental setup allowed us to study the effect of 9 light modes (LM) compared to white light. The analyzes performed showed that the highest levels of chlorophyll a, chlorophyll b, and carotenoids occurred under LM4, LM3, and LM1, respectively. Chlorophyll a fluorescence measurement showed that the best effective quantum yield of PSII photochemistry Y(II), non-photochemical quenching (NPQ), photochemical quenching coefficient (qP), and electron transport ratio (ETR) were obtained under LM2. The data showed that the application of R7:G0:B3 light mode with a shorter photoperiod than 14/10 h (light/dark), regardless of the light intensity used, resulted in a significant increase in growth as well as higher photosynthetic capacity of rocket plants. Since, a clear correlation between the studied traits under the applied light modes was not found, more features should be studied in future experiments.

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Section: Discussionmentioning

confidence: 99%

Photosynthetic performance of rocket (Eruca sativa. Mill.) grown under different regimes of light intensity, quality, and photoperiod

et al. 2021

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“…Cryptochromes and phototropins are the B light acceptors, whereas phytochromes are more sensitive acceptors for R light ( Whitelam and Halliday 2008 ). These photoreceptors acquire information from the light environment and use that information to modulate cellular processes ( Smith 1982 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of growth under different light spectra on the subsequent high light tolerance in rose plants

et al. 2018

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“…From a mechanistic perspective, unlike blue light responses primarily mediated by CRYs and PHOT [ 63 ], the regulation of red and near-infrared light is closely associated with plant photoreceptors, particularly phytochromes (phyA–phyE) [ 64 ]. In terms of plant physiological regulation, research [ 65 ] demonstrated that phyA significantly induces plant germination, which is specifically stimulated by red and near-infrared light.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Effects of Full-Spectrum LED Lighting on Strawberry Traits Using Correlation Analysis and Time-Series Prediction

Lu,

Gong,

et al. 2024

Plants

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In crop cultivation, particularly in controlled environmental agriculture, light quality is one of the most critical factors affecting crop growth and harvest. Many scholars have studied the effects of light quality on strawberry traits, but they have used relatively simple light components and considered only a small number of light qualities and traits in each experiment, and the results were not complete or objective. In order to comprehensively investigate the effects of different light qualities from 350 nm to 1000 nm on strawberry traits to better predict the future growth trend of strawberries under different light qualities, we proposed a new approach. We introduced Spearman’s rank correlation coefficient to handle complex light quality variations and multiple traits, preprocessed the cultivation data through the CEEDMAN method, and predicted them using the Informer network. We took 500 strawberry plants as samples and cultivated them in 72 groups of dynamically changing light qualities. Then, we recorded the growth changes and formed training and testing sets. Finally, we discussed the correlation between light quality and plant trait changes in consistency with current studies, and the proposed prediction model achieved the best performance in the prediction task of nine plant traits compared with the comparison models. Thus, the validity of the proposed method and model was demonstrated.

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Light Regulation and Biological Clocks

Cited by 9 publications

References 99 publications

Photosynthetic performance of rocket (Eruca sativa. Mill.) grown under different regimes of light intensity, quality, and photoperiod

Photosynthetic performance of rocket (Eruca sativa. Mill.) grown under different regimes of light intensity, quality, and photoperiod

Effects of growth under different light spectra on the subsequent high light tolerance in rose plants

Investigating the Effects of Full-Spectrum LED Lighting on Strawberry Traits Using Correlation Analysis and Time-Series Prediction

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