UV-A light induces a robust and dwarfed phenotype in cucumber plants (Cucumis sativus L.) without affecting fruit yield

Qian, Minjie; Rosenqvist, Eva; Flygare, Ann-Marie; Kalbina, Irina; Teng, Yuanwen; Jansen, Marcel A. K.; Strid, Åke

doi:10.1016/j.scienta.2019.109110

Cited by 48 publications

(58 citation statements)

References 38 publications

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“…In this study, blue (430 nm and 465 nm) and UV-A (380 nm and 400 nm) wavebands could significantly increase the biomass of two Brassicaceae baby-leaves, among which T430 and T465 were superior (Figure 1a,b). Similar effects were observed in blue light treated cabbage microgreens [34] and UV-A light treated cucumber plants [35]. However, neither kale, arugula, and mustard microgreens showed increased biomass under blue light [34], nor cucumbers under UV-B light [35].…”

Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffesupporting

confidence: 68%

“…However, neither kale, arugula, and mustard microgreens showed increased biomass under blue light [34], nor cucumbers under UV-B light [35]. One reason why blue wavebands were efficient in increasing the fresh and dry yield might be the enhanced PAR that help elevating stomatal opening and CO 2 absorbing, enhancing the photosynthesis, and consequently increasing the plant biomass [35][36][37][38]. Besides, the photosynthetic pigments levels were closely linked to biomass accumulation.…”

Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffementioning

confidence: 99%

“…Generally, blue light was considered as a negative regulate factor that inhibited gibberellin and auxin synthesis and/or sensitivity in plants and consequently suppressed the hypocotyl elongation [34,[39][40][41], inter-node growth [42,43], and shoot length [44,45]. UV-A was also reported to a robust and dwarfed phenotype [35,44,46]. Differently in this study, Chinese kale and pak-choi baby-leaves exhibited higher plant height, enlarged leaf length, and remarkably increased leaf numbers under supplemental blue and UV-A light wavelengths (Figure 1c-f).…”

Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffementioning

confidence: 99%

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Effects of Supplementary Blue and UV-A LED Lights on Morphology and Phytochemicals of Brassicaceae Baby-Leaves

Zheng

et al. 2020

Molecules

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Brassicaceae baby-leaves are good source of functional phytochemicals. To investigate how Chinese kale and pak-choi baby-leaves in response to different wavebands of blue (430 nm and 465 nm) and UV-A (380 nm and 400 nm) LED, the plant growth, glucosinolates, antioxidants, and minerals were determined. Both agronomy traits and phytochemical contents were significantly affected. Blue and UV-A light played a predominant role in increasing the plant biomass and morphology, as well as the contents of antioxidant compounds (vitamin C, vitamin E, phenolics, and individual flavonols), the antioxidant activity (DPPH and FRAP), and the total glucosinolates accumulation. In particular, four light wavebands significantly decreased the content of progoitrin, while 400 nm UV-A light and 430 nm blue light were efficient in elevating the contents of sinigrin and glucobrassicin in Chinese kale. Meanwhile, 400 nm UV-A light was able to increase the contents of glucoraphanin, sinigrin, and glucobrassicin in pak-choi. From the global view of heatmap, blue lights were more efficient in increasing the yield and phytochemical levels of two baby-leaves.

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Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffesupporting

confidence: 68%

Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffementioning

confidence: 99%

Section: Improved Agronomy Traits Of Baby-leaves In Response To Diffementioning

confidence: 99%

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Effects of Supplementary Blue and UV-A LED Lights on Morphology and Phytochemicals of Brassicaceae Baby-Leaves

Zheng

et al. 2020

Molecules

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“…Plant responses to UV-B are highly species specific and morphological responses can be either positive (increase in plant growth) or negative (decrease in plant growth) (Huché-Thélier et al, 2016). UV-B can also reduce stem extension and leaf expansion and affect leaf thickness, leaf curling and auxiliary branching (Jansen, 2002;Wargent et al, 2009;Klem et al, 2012;Jenkins, 2017;Qian et al, 2020). Moreover, under low doses, UV-B radiation can promote the accumulation of photoprotective compounds in the leaf tissue (Day et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Spectral Composition of Light Affects Sensitivity to UV-B and Photoinhibition in Cucumber

et al. 2021

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Ultraviolet B (UV-B) (280–315 nm) and ultraviolet A (UV-A) (315–400 nm) radiation comprise small portions of the solar radiation but regulate many aspects of plant development, physiology and metabolism. Until now, how plants respond to UV-B in the presence of different light qualities is poorly understood. This study aimed to assess the effects of a low UV-B dose (0.912 ± 0.074 kJ m–2 day–1, at a 6 h daily UV exposure) in combination with four light treatments (blue, green, red and broadband white at 210 μmol m–2 s–1 Photosynthetically active radiation [PAR]) on morphological and physiological responses of cucumber (Cucumis sativus cv. “Lausanna RZ F1”). We explored the effects of light quality backgrounds on plant morphology, leaf gas exchange, chlorophyll fluorescence, epidermal pigment accumulation, and on acclimation ability to saturating light intensity. Our results showed that supplementary UV-B significantly decreased biomass accumulation in the presence of broad band white, blue and green light, but not under red light. UV-B also reduced the photosynthetic efficiency of CO2 fixation (α) when combined with blue light. These plants, despite showing high accumulation of anthocyanins, were unable to cope with saturating light conditions. No significant effects of UV-B in combination with green light were observed for gas exchange and chlorophyll fluorescence parameters, but supplementary UV-B significantly increased chlorophyll and flavonol contents in the leaf epidermis. Plants grown under red light and UV-B significantly increased maximum photosynthetic rate and dark respiration compared to pure red light. Additionally, red and UV-B treated plants exposed to saturating light intensity showed higher quantum yield of photosystem II (PSII), fraction of open PSII centres and electron transport rate and showed no effect on the apparent maximum quantum efficiency of PSII photochemistry (Fv/Fm) or non-photochemical quenching, in contrast to solely red-light conditions. These findings provide new insights into how plants respond to UV-B radiation in the presence of different light spectra.

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“…19 Also, high light stress had been shown to induce a dwarf phenotype in cucumber (Cucumis sativus) plants. 20 When plants are exposed to intense heatwaves, they respond by increasing the reactive oxygen species (ROS) levels. The oxidative damage by high ROS levels is mitigated by enzymatic and non-enzymatic antioxidants in order to ensure ROS homeostasis, as the ROS levels are maintained within a dened range.…”

Section: Abiotic and Biotic Stress Genes Regulating Detoxication In mentioning

confidence: 99%

Adaptation mechanism of mango fruit (Mangifera indicaL. cv. Chaunsa White) to heat suggest modulation in several metabolic pathways

et al. 2020

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UV-A light induces a robust and dwarfed phenotype in cucumber plants (Cucumis sativus L.) without affecting fruit yield

Cited by 48 publications

References 38 publications

Effects of Supplementary Blue and UV-A LED Lights on Morphology and Phytochemicals of Brassicaceae Baby-Leaves

Effects of Supplementary Blue and UV-A LED Lights on Morphology and Phytochemicals of Brassicaceae Baby-Leaves

Spectral Composition of Light Affects Sensitivity to UV-B and Photoinhibition in Cucumber

Adaptation mechanism of mango fruit (Mangifera indicaL. cv. Chaunsa White) to heat suggest modulation in several metabolic pathways

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