Effect of the combination of ethylene and red LED light irradiation on carotenoid accumulation and carotenogenic gene expression in the flavedo of citrus fruit

Ascorbate is one of the most abundant soluble antioxidants in the plant. Multiple functions of ascorbate in photo protection have been proposed, including scavenging of reactive oxygen species generated by oxygen photoreduction and photorespiration. There is still unclear information relation to LED light with Ascorbate biosynthesis and metabolism, yellowing, chlorophyll content, and ethylene production in broccoli florets. The effect of light-emitting diodes (LED) light on ascorbate (AsA) biosynthesis and metabolism in broccoli (Brassica oleracea L. var. Italica) cultivar “Ryokurei” were studied using red (660 nm), blue (470 nm) and white LED lights as the light source and also no light treatment as the control. Gene expression involved in the biosynthesis and metabolism of AsA, AsA content, color, chlorophyll content and ethylene production rate on the postharvest broccoli were observed in 4 days. The result showed that after two days, red light treatment significantly (p < 0,05) delayed the decrease of ascorbate content. The result was supported by observations using Real-Time Quantitative RT-PCR showed that red light treatment can suppress mRNA level of BO-APX1, BO-APX2, and BO-sAPX on the third day. Observation of BO-GLDH mRNA level was increased in the third-day exposure of red LED light. Therefore red LED light showed up-regulated AsA biosynthesis transcriptional level. Enzymes which possibility responsible for AsA metabolism and biosynthesis in a row were Ascorbate Peroxide (APX) and L-Galactono-1,4-Lactone Dehydrogenase (GLDH). The regulation of this gene expression might contribute to the suppression of AsA reduction by red LED light treatment in broccoli. Red LED also showed suppression of yellowing and decline the chlorophyll content in postharvest broccoli florets. Keywords: ascorbate, LED; broccoli; gene expression; real-time quantitative RT-PCR.

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Gene Expression Related to Steviol Glycoside Synthesis Produced in Stevia rebaudiana (Bert.) Shoot Culture Induced with High Far-Red LED Light in TIS RITA® Bioreactor System

Sarhad Journal of Agriculture ◽

10.17582/journal.sja/2021/37.1.1.8 ◽

2021 ◽

Vol 37 (1) ◽

Author(s):

Agustine Christela Melviana ◽

Rizkita Rachmi Esyanti ◽

Roy Hendroko Setyobudi ◽

Maizirwan Mel ◽

Praptiningsih Gamawati Adinurani ◽

...

Keyword(s):

Gene Expression ◽

Shoot Culture ◽

Stevia Rebaudiana ◽

Led Light ◽

Glycoside Synthesis ◽

Steviol Glycoside ◽

Red Led ◽

Bioreactor System

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Effect of Blue and Red LED Light Irradiation on β-Cryptoxanthin Accumulation in the Flavedo of Citrus Fruits

Journal of Agricultural and Food Chemistry ◽

10.1021/jf203364m ◽

2011 ◽

Vol 60 (1) ◽

pp. 197-201 ◽

Cited By ~ 64

Author(s):

Gang Ma ◽

Lancui Zhang ◽

Masaya Kato ◽

Kazuki Yamawaki ◽

Yoshikazu Kiriiwa ◽

...

Keyword(s):

Light Irradiation ◽

Citrus Fruits ◽

Led Light ◽

Red Led

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Faculty Opinions recommendation of Continuous ultra-low-intensity artificial daylight is not as effective as red LED light in photodynamic therapy of multiple actinic keratoses.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.13499957.14879057 ◽

2012 ◽

Author(s):

Rik Roelandts

Keyword(s):

Photodynamic Therapy ◽

Actinic Keratoses ◽

Led Light ◽

Low Intensity ◽

Red Led

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Enhanced photocatalytic degradation of methyl orange by coconut shell–derived biochar composites under visible LED light irradiation

Environmental Science and Pollution Research ◽

10.1007/s11356-020-12251-4 ◽

2021 ◽

Author(s):

Yean Ling Pang ◽

Zhi Xuan Law ◽

Steven Lim ◽

Yin Yin Chan ◽

Siew Hoong Shuit ◽

...

Keyword(s):

Methyl Orange ◽

Photocatalytic Degradation ◽

Light Irradiation ◽

Coconut Shell ◽

Led Light ◽

Degradation Of Methyl Orange

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Virulence of Aerial Conidia of Beauveria bassiana Produced under LED Light to Ctenocephalides felis (Cat Flea)

Journal of Pathogens ◽

10.1155/2018/1806830 ◽

2018 ◽

Vol 2018 ◽

pp. 1-4

Author(s):

Sarayut Pittarate ◽

Malee Thungrabeab ◽

Supamit Mekchay ◽

Patcharin Krutmuang

Keyword(s):

Beauveria Bassiana ◽

Adult Mortality ◽

Ctenocephalides Felis ◽

Fluorescent Light ◽

Malt Extract ◽

Led Light ◽

Red Led ◽

Aerial Conidia ◽

Different Color

Ctenocephalides felis is an ectoparasitic flea species commonly found on dogs and cats. The current study verified the in vitro virulence of conidia of the entomopathogenic fungus Beauveria bassiana produced under different color LED light (red, blue, purple, green, yellow, and white) to adults of C. felis. The fungal isolates were cultivated on malt extract agar (MEA). Bioassay treatments used aerial conidia in test tubes. Adult fleas were obtained from a house cat in Chiang Mai province, Thailand. The experiments were composed of one control and eleven treatment groups. All of the treatments with B. bassiana conidia caused adult mortality after an exposure of 12 h. Among the conditions used in this study, B. bassiana cultured under red LED and fluorescent light were the most effective in causing mortality (100 %) in adult fleas after 36 h. The experimental results indicate that these aerial conidia of B. bassiana have promising potential for use in control of C. felis adult stages.

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