Leaf chlorosis, epinasty, carbohydrate contents and growth of tomato show different responses to the red/blue wavelength ratio under continuous light

Pham, Minh Duy; Hwang, Hyunseung; Park, Seon Woo; Cui, Meiyan; Lee, Hyein; Chun, Changhoo

doi:10.1016/j.plaphy.2019.06.004

Cited by 27 publications

(17 citation statements)

References 36 publications

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“…At the same plant size, RMF was higher in RB and B compared to R ( Figures 3C,D ). Similar results were found with tomato seedlings where the blue light increased the RMF, although the root-to-shoot ratio was 0.14 in red light and 0.31 under blue light in the experiment by Izzo et al ( 2020 ), and 0.10 and 0.08 in the study of Pham et al ( 2019 ). The slope of RMF vs. log-total DW was higher in RB and B treatments under low nitrogen ( Figure 4C ).…”

Section: Discussionsupporting

confidence: 83%

“…Izzo et al ( 2020 ) reported that red light reduced tomato root growth and root-to-shoot ratio compared to the mixture of red light with blue light. Pham et al ( 2019 ) found blue light reduced root weight compared to red light and mixed red and blue light in tomato seedlings. Sakuraba and Yanagisawa ( 2018 ) reviewed the effects of light signaling on sucrose transportation via expression of sugar transporter by HY5, which could induce phloem-mobile sucrose in leaf to promote root development and nitrate uptake (Lejay et al, 2003 ; Chen et al, 2012 ; Kircher and Schopfer, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

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The Interaction Between Nitrogen Supply and Light Quality Modulates Plant Growth and Resource Allocation

et al. 2022

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Nitrogen availability and light quality affect plant resource allocation, but their interaction is poorly understood. Herein, we analyzed the growth and allocation of dry matter and nitrogen using lettuce (Lactuca sativa L.) as a plant model in a factorial experiment combining three light regimes (100% red light, R; 50% red light + 50% blue light, RB; 100% blue light, B) and two nitrogen rates (low, 0.1 mM N; high, 10 mM N). Red light increased shoot dry weight in relation to both B and RB irrespective of nitrogen supply. Blue light favored root growth under low nitrogen. Allometric analysis showed lower allocation to leaf in response to blue light under low nitrogen and similar leaf allocation under high nitrogen. A difference in allometric slopes between low nitrogen and high nitrogen in treatments with blue light reflected a strong interaction effect on root-to-shoot biomass allocation. Shoot nitrate concentration increased with light exposure up to 14 h in both nitrogen treatments, was higher under blue light with high nitrogen, and varied little with light quality under low nitrogen. Shoot nitrogen concentration, nitrogen nutrition index, and shoot NR activity increased in response to blue light. We conclude that the interaction between blue light and nitrogen supply modulates dry mass and nitrogen allocation between the shoot and root.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

The Interaction Between Nitrogen Supply and Light Quality Modulates Plant Growth and Resource Allocation

et al. 2022

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“…Soluble sugar accumulation under blue light might be due to photosynthetic carbon partitioning as well as related to stomatal aperture and amount of stomata, which displayed a high sensitivity to blue light ( Fantini et al, 2019 ). A previous study showed that tomato seedlings under continuous monochromatic blue light displayed the lowest contents of starch and soluble sugars, compared to the other treatments due to leaf injuries caused by continuous light ( Pham et al, 2019 ). Intermittent illumination with 1, 2, 4, 6, and 8 L/D cycles, respectively, over the period showed that higher levels of soluble sugar, especially fructose and starch, were observed in lettuce exposed to L/D (2) and L/D (3) compared with any other treatment, via increasing activities of sucrose synthase (SS), acid invertase (AI), and neutral invertase (NI) involved in sucrose metabolism ( Chen and Yang, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

Wei

Zhang

et al. 2022

Front. Plant Sci.

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Tomatoes (Solanum lycopersicum L. Micro-Tom) were grown in a plastic greenhouse. When plants anthesis, the 100 μmol m–2 s–1 blue light-emitting diode (LED) light (430 ± 10 nm) was supplemented from 6:00 to 18:00. There were 5 treatments, which contained different blue light frequencies with the same intensity: S6 (30 min blue light and 30 min pause), S8 (30 min blue light and 15 min pause), S10 (30 min blue and 8 min pause), S12 (continuous blue light for 12 h), and control (CK) (natural light, without any supplemental light). Agronomic traits and nutritional qualities of tomato fruits were measured at 30, 34, 38, 42, and 46 days after anthesis (DAA), respectively. Different frequencies of supplemental blue light could accelerate flowering of tomato plants and promote fruit ripening about 3–4 days early via promoting ethylene evolution of fruits, which significantly facilitated the processes of color change and maturity in tomato fruits. The contents of lycopene, total phenolic compounds, total flavonoids, vitamin C, and soluble sugar, as well as the overall antioxidant activity of tomato fruits were significantly enhanced by all the supplemental blue light treatments. In all, different frequencies of supplemental blue light prominently reinforced the antioxidant levels and nutritional qualities of tomato fruits, especially lycopene content, and S10 was more optimal for tomato fruits production in a plastic greenhouse.

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“…The monochromatic R light effect on photosynthetic product accumulation has been validated in several taxa. Since both auxin biosynthesis and transport are affected by carbohydrate content, the latter may underlie the noted leaf epinasty under R light [ 60 ]. Although carbohydrate synthesis is reduced owing to disturbed photosynthetic apparatus, the increased carbohydrate content in R-exposed seedlings is possibly the result of reduced translocation out of the leaves [ 61 ].…”

Section: Discussionmentioning

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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Leaf chlorosis, epinasty, carbohydrate contents and growth of tomato show different responses to the red/blue wavelength ratio under continuous light

Cited by 27 publications

References 36 publications

The Interaction Between Nitrogen Supply and Light Quality Modulates Plant Growth and Resource Allocation

The Interaction Between Nitrogen Supply and Light Quality Modulates Plant Growth and Resource Allocation

Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

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

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