Diverse photoreceptors and light responses in plants

Kong, Sam‐Geun; Okajima, Koji

doi:10.1007/s10265-016-0792-5

Cited by 100 publications

(75 citation statements)

References 26 publications

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“…Therefore, we focused on the effects of blue and red light, both of which are sensed by specific photoreceptors in plants [24,25]. Expression levels of biosynthetic genes in the porphyrin pathway were examined using qRT-PCR in rice seedlings grown under broad spectrum-white LED as well as blue and red LEDs.…”

Section: Resultsmentioning

confidence: 99%

Effects of Light-Emitting Diode Irradiation on Growth Characteristics and Regulation of Porphyrin Biosynthesis in Rice Seedlings

Tran

Jung

2017

IJMS

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Abstract:We examined the effects of light quality on growth characteristics and porphyrin biosynthesis of rice seedlings grown under different wavelengths from light emitting diodes (LEDs). After 10 days of exposure to various wavelengths of LEDs, leaf area and shoot biomass were greater in seedlings grown under white and blue LEDs than those of green and red LEDs. Both green and red LED treatments drastically decreased levels of protoporphyrin IX (Proto IX) and Mg-porphyrins compared to those of white LED, while levels of Mg-Proto IX monomethyl ester and protochlorophyllide under blue LED were decreased by 21% and 49%, respectively. Transcript levels of PPO1 were greatly upregulated in seedlings grown under red LED compared to white LED, whereas transcript levels of HO2 and CHLD were upregulated under blue LED. Overall, most porphyrin biosynthetic genes in the Fe-porphyrin branch remained almost constant or upregulated, while most genes in the Mg-porphyrin branch were downregulated. Expression levels of nuclear-encoded photosynthetic genes Lhcb and RbcS noticeably decreased after exposure to blue and red LEDs, compared to white LED. Our study suggests that specific wavelengths of LED greatly influence characteristics of growth in plants partly through altering the metabolic regulation of the porphyrin biosynthetic pathway, and possibly contribute to affect retrograde signaling.

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Section: Resultsmentioning

confidence: 99%

Effects of Light-Emitting Diode Irradiation on Growth Characteristics and Regulation of Porphyrin Biosynthesis in Rice Seedlings

Tran

Jung

2017

IJMS

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“…We were able to organize six international symposia in the past BSJ meetings held in 2014, 2015, and 2016, but only 14 articles from the initial two symposia held in 2014 have been published in 2016 as special issues (Terashima et al 2016;Kong and Okajima 2016). Our efforts will be eagerly succeeded by the new editorial members.…”

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confidence: 99%

With gratitude for the Journal of Plant Research

Nishida

2016

J Plant Res

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“…Phytochromes are plant photoreceptors that mediate physiological and developmental responses, such as germination, stem elongation, flowering, chloroplast and leaf development, and gene expression [31]. For example, cotton fibers exposed to a high red/far-red photon ratio during development were longer than those that received lower red/far-red ratio, implicating the involvement of a phytochrome [32].…”

Section: Discussionmentioning

confidence: 99%

“…From 10 DAC to 20 DAC, cellulose biosynthesis was faster in the light culture than in the dark culture, which resulted in a large amount of carbohydrates being consumed by the fibers and a smaller amount of carbohydrates being used for flavonoid biosynthesis. However, during the later stage of culture (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40), the speed of cellulose biosynthesis was low under light culture, and carbohydrates were mainly used for flavonoid biosynthesis.…”

Section: Discussionmentioning

confidence: 99%

Effects of light on in vitro fiber development and flavonoid biosynthesis in green cotton (Gossypium hirsutum)

et al. 2016

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As an environmental factor, light influences the physiological functions and secondary metabolism of plants. However, the role of light in cotton fiber development and pigment biosynthesis has not yet been thoroughly explored. In this study, ovules of green cotton were cultured in vitro under dark and light conditions, and fiber and ovule growth parameters as well as fiber carbohydrate and cellulose contents and the expression of genes related to fiber development were investigated to elucidate the effect of light on fiber development. In addition, to investigate the effect of light on fiber pigment biosynthesis, the fiber flavonoid content and related gene expression were determined. The results demonstrated that the fiber length and the expression levels of fiber elongation genes under light culture were significantly lower than under dark culture, however, the ovule and fiber weight were significantly higher than under dark culture. The fiber developed under light culture had higher carbohydrate concentrations and carbohydrate transformation rate than under dark culture. Additionally, light culture exhibited higher cellulose contents and expression levels of cellulose biosynthesis genes compared with dark culture. In contrast, the pattern of the effect of light on flavonoid biosynthesis differed from that for cellulose biosynthesis. At 10 DAC (days after culture) and 20 DAC, the flavonoid contents and the expression levels of genes related to flavonoid biosynthesis were lower than under dark culture. However, the flavonoid contents and gene expression levels observed at 30 DAC and 40 DAC were higher in the light culture than in the dark culture. These results suggested that light hindered fiber elongation, but promoted carbohydrate accumulation and carbohydrate transformation, which resulted in fiber weight gain and increased cellulose accumulation in fibers. In addition, light inhibited flavonoid biosynthesis at early stage of fiber development, but promoted it at later stages. These findings provide the basis for intensive study of fiber development and flavonoids biosynthesis in green cotton.

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Diverse photoreceptors and light responses in plants

Cited by 100 publications

References 26 publications

Effects of Light-Emitting Diode Irradiation on Growth Characteristics and Regulation of Porphyrin Biosynthesis in Rice Seedlings

Effects of Light-Emitting Diode Irradiation on Growth Characteristics and Regulation of Porphyrin Biosynthesis in Rice Seedlings

With gratitude for the Journal of Plant Research

Effects of light on in vitro fiber development and flavonoid biosynthesis in green cotton (Gossypium hirsutum)

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