Effects of light spectrum on morpho-physiological traits of grafted tomato seedlings

Ahmed, Yousef; Ali, Muhammad; Rizwan, Hafiz Muhammad; Ahmed, Mohamed A. A.; Ali, Waleed M.; Kalaji, Hazem M.; Elsheery, Nabil I.; Wróbel, Jacek; Xu, Yong; Chen, Faxing

doi:10.1371/journal.pone.0250210

Cited by 20 publications

(8 citation statements)

References 64 publications

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“…Plants exposed to a mixture of red and blue light had greater photoreceptor excitation, like phytochromes, cryptochromes, and phototropins, and had higher photosynthetic activity than plants exposed to monochromatic red or blue light 46 . According to Yousef and coauthors showed that a combination of R and B LED light with a high R portion was effective in producing vigorous grafted tomato seedlings compared to blue and red light alone 20 , 47 , 48 . Also, Dong et al 49 , as compared to blue light alone, red light alone, and sunshine, combined red and blue light (1/3 blue light at 450–460 nm + 2/3 red light at 620–630 nm, at 400 lx and 12 h photoperiod for 60 days) improved the DW and bio efficiency of Cordyceps militaris mushroom.…”

Section: Discussionmentioning

confidence: 99%

Increasing the performance of cucumber (Cucumis sativus L.) seedlings by LED illumination

Hamedalla

Ali

et al. 2022

Sci Rep

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Light is one of the most important limiting factors for photosynthesis and the production of plants, especially in the regions where natural environmental conditions do not provide sufficient sunlight, and there is a great dependence on artificial lighting to grow plants and produce food. The influence of light intensity, quality, and photoperiod on photosynthetic pigments content and some biochemical and growth traits of cucumber seedlings grown under controlled conditions was investigated. An orthogonal design based on a combination of different light irradiances, ratio of LEDs and photoperiods was used. Treaments consisted of three light irradiance regimes (80, 100, and 150 µmol m−2 s−1) provided by light-emitting diodes (LEDs) of different ratios of red and blue (R:B) (30:70, 50:50, and 70:30) and three different photoperiods (10/14, 12/12, and 14/10 h). The white light was used as a control/reference. Plant height, hypocotyl length, stem diameter, leaf area, and soluble sugar content were highest when exposed to LM9 (150 µmol m−2 s−1; R70:B30; 12/12 h) light mode, while the lowest values for the above parameters were obtained under LM1 (80 µmol m−2 s−1; R30:B70; 10/14 h). Higher pigments contents (chlorophyll a, chlorophyll b, and carotenoid) were obtained when light regime LM9 (150 µmol m−2 s−1; R70:B30; 12/12 h) was applied. In general, cucumber seedlings grown under the LM9 regime showed a significant increase in growth as well as photosynthetic capacity. It seems that the content of photosynthetic pigments is the key factor responsible for the performance of cucumber seedlings grown under different lighting modes, compared to other traits studied. We recommend monitoring the content of chlorophyll a, b, and their ratio value when studying the light requirement of cucumber plants.

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Section: Discussionmentioning

confidence: 99%

Increasing the performance of cucumber (Cucumis sativus L.) seedlings by LED illumination

Hamedalla

Ali

et al. 2022

Sci Rep

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“…Naznin, et al 38 and Yang, et al 39 investigated in pepper seedlings and Yang et al 40 tomato seedlings, and they found that in particular the red LED light was important for producing strong seedlings. Also, Yousef and coauthors showed that a combination of R and B LED light with a high R portion was effective in producing vigorous grafted tomato seedlings 28 , 29 . In most studies a combination of R and B light was more effective in promoting plant growth and development than the use of one LED source alone.…”

Section: Discussionmentioning

confidence: 99%

Increasing the performance of Passion fruit (Passiflora edulis) seedlings by LED light regimes

Liang

Ahmed

Wei

et al. 2021

Sci Rep

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Due to progress in the industrial development of light-emitting diodes (LEDs), much work has been dedicated to understanding the reaction of plants to these light sources in recent years. In this study, the effect of different LED-based light regimes on growth and performance of passion fruit (Passiflora edulis) seedlings was investigated. Combinations of different light irradiances (50, 100, and 200 µmol m−2 s−1), quality (red, green, and blue light-emitting LEDs), and photoperiods (10 h/14 h, 12 h/12 h and 14 h/10 h light/dark cycles) were used to investigate the photosynthetic pigment contents, antioxidants and growth traits of passion fruit seedlings in comparison to the same treatment white fluorescent light. Light irradiance of 100 µmol m−2 s−1 of a 30% red/70% blue LED light combination and 12 h/12 h light/dark cycles showed the best results for plant height, stem diameter, number of leaves, internode distance, and fresh/dry shoot/root weights. 14 h/10 h light/dark cycles with the same LED light combination promoted antioxidant enzyme activities and the accumulation of phenols and flavonoids. In contrast, lower light irradiance (50 µmol m−2 s−1) had negative effects on most of the parameters. We conclude that passion fruit seedlings' optimal performance and biomass production requires long and high light irradiances with a high blue light portion.

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“…Therefore, among environmental factors, the role of light quality on mediating seedling growth and vigor is currently the most neglected one [ 8 , 9 ]. This topic has been currently addressed by a handful of studies, where different light quality regimes were reported for driving optimal growth during healing and acclimatization [ 5 , 6 , 10 ]. For instance, monochromatic red (R) light led to optimum grafted tomato seedling quality [ 5 ], whereas a spectrum including both blue (B) and R spectral regions was required in pepper [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Blue Light Improves Photosynthetic Performance during Healing and Acclimatization of Grafted Watermelon Seedlings

Moosavi-Nezhad

Salehi

Aliniaeifard

et al. 2021

IJMS

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To investigate the importance of light on healing and acclimatization, in the present study, grafted watermelon seedlings were exposed to darkness (D) or light, provided by blue (B), red (R), a mixture of R (68%) and B (RB), or white (W; 35% B, 49% intermediate spectra, 16% R) LEDs for 12 days. Survival ratio, root and shoot growth, soluble carbohydrate content, photosynthetic pigments content, and photosynthetic performance were evaluated. Seedling survival was not only strongly limited in D but the survived seedlings had an inferior shoot and root development, reduced chlorophyll content, and attenuated photosynthetic efficiency. RB-exposed seedlings had a less-developed root system. R-exposed seedlings showed leaf epinasty, and had the smallest leaf area, reduced chlorophyll content, and suppressed photosynthetic apparatus performance. The R-exposed seedlings contained the highest amount of soluble carbohydrate and together with D-exposed seedlings the lowest amount of chlorophyll in their scions. B-exposed seedlings showed the highest chlorophyll content and improved overall PSII photosynthetic functioning. W-exposed seedling had the largest leaf area, and closely resembled the photosynthetic properties of RB-exposed seedlings. We assume that, during healing of grafted seedlings monochromatic R light should be avoided. Instead, W and monochromatic B light may be willingly adopted due to their promoting effect on shoot, pigments content, and photosynthetic efficiency.

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Effects of light spectrum on morpho-physiological traits of grafted tomato seedlings

Cited by 20 publications

References 64 publications

Increasing the performance of cucumber (Cucumis sativus L.) seedlings by LED illumination

Increasing the performance of cucumber (Cucumis sativus L.) seedlings by LED illumination

Increasing the performance of Passion fruit (Passiflora edulis) seedlings by LED light regimes

Blue Light Improves Photosynthetic Performance during Healing and Acclimatization of Grafted Watermelon Seedlings

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