Effects of Laser and LED on Growth, Photosynthesis, Physiological and Biochemical Characteristics of <i>Solanum lycopersicum</i> Seedlings

CHEN Meixiang; CHEN Xiong; SHEN Baoying; QIU Wenting; WANG Hong; GUO Jian; LIN Huoyang; LIU Yinchun

doi:10.19303/j.issn.1008-0384.2022.003.008

Volume 37 Issue 3

Mar. 2022

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Article Navigation > Fujian Journal of Agricultural Sciences > 2022 > 37(3): 335-343

CHEN M X, CHEN X, SHEN B Y, et al. Effects of Laser and LED on Growth, Photosynthesis, Physiological and Biochemical Characteristics of Solanum lycopersicum Seedlings [J]. Fujian Journal of Agricultural Sciences，2022，37（3）：335−343 doi: 10.19303/j.issn.1008-0384.2022.003.008

Citation:

CHEN M X, CHEN X, SHEN B Y, et al. Effects of Laser and LED on Growth, Photosynthesis, Physiological and Biochemical Characteristics of Solanum lycopersicum Seedlings [J]. Fujian Journal of Agricultural Sciences，2022，37（3）：335−343 doi: 10.19303/j.issn.1008-0384.2022.003.008

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Effects of Laser and LED on Growth, Photosynthesis, Physiological and Biochemical Characteristics of Solanum lycopersicum Seedlings

doi: 10.19303/j.issn.1008-0384.2022.003.008

CHEN Meixiang^{1, 2
,},
CHEN Xiong^{1, 3},
SHEN Baoying^{1, 4},
QIU Wenting¹,
WANG Hong¹,
GUO Jian¹,
LIN Huoyang¹,
LIU Yinchun^{1, 2
,
,}

1.
College of Internet of Things and Artificial Intelligence, Fujian Polytechnic of Information Technology, Fuzhou, Fujian　350001, China
2.
College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian　350002, China
3.
College of Electronics and Information Science, Fujian Jiangxia University, Fuzhou, Fujian　350108, China
4.
College of Horticulture, Fujian Agricultural and Forestry University, Fuzhou, Fujian　350002, China

Received Date: 2021-12-28
Rev Recd Date: 2022-02-20

Available Online: 2022-04-24

Publish Date: 2022-03-31

Abstract

Abstract

Objective Effects of laser and light-emitting diode (LED) exposures on growth, photosynthesis, and physiological and biochemical characteristics of Solanum lycopersicum seedlings were investigated. Method A CIRAS-3 system was used to determine the photosynthetic response of 30-d-old tomato seedlings exposed to 2 red and 1 blue monochromatic laser or LED. Then, using a color temperature of 6 000 K white LED as control the seedling growth under the LED white light supplemented with a small amount of blue light along with the photosynthesis-stimulating red light as treatments was compared. Result The photosynthetic capacity of the seedlings exposed to 650nm red light was greater than the other wavelengths of red light when the photosynthetic quantum flux density PPFD was below 400 μmol·m⁻²·s⁻¹. The capacities produced by laser of 650 nm and 450 nm were greater than LED of same wavelengths. The growth indicators, maximum net photosynthetic rate, and water use efficiency of the seedlings exposed to either laser or LED was greater than control, but laser significantly higher than LED (p＜0.05). All treatments had a same light compensation point, but the seedlings grown under white LED supplemented with both 650 nm and 450 nm laser had the lowest light saturation point. In addition, laser was significantly more effective than LED in increasing the contents of chlorophyll a, carotenoid, and malondialdehyde (MDA) and the activity of peroxidase (POD), although it did not affect the superoxide dismutase (SOD) activity. Conclusion The white LED supplemented with laser, especially both 650nm and 450nm, significantly promoted the growth, photosynthetic capacity, and antioxidant activities of the tomato seedlings in comparison to LED supplementation.
- Tomato,
- laser,
- LED,
- supplementary light,
- photosynthesis,
- physiology and biochemistry

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References(30)

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