HY5: A Pivotal Regulator of Light-Dependent Development in Higher Plants

Xiao, Yuntao; Chu, Li; Zhang, Yumeng; Bian, Yeting; Xiao, Jiahui; Xu, Dongqing

doi:10.3389/fpls.2021.800989

Cited by 82 publications

(70 citation statements)

References 123 publications

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“…In the shoot, HY5 promotes carbon assimilation and translocation, whereas, in the root, it activates NRT2.1 expression and nitrate uptake. It has been shown in Arabidopsis mutants that HY5 is a shoot-root mobile signal that coordinates shoot growth and carbon assimilation with root growth and nitrogen uptake in different light environments [124][125][126][127]. (Rubisco), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), fructose-1,6-bisphosphatase (FBP), sedoheptulose-1,7-bisphosphatase (SBP), and ribulose-5-phosphate kinase (RPK) (Figure 4).…”

Section: Light Intensity-and Spectrum-associated Adjustment Of Metabo...mentioning

confidence: 99%

Section: Light Intensity- and Spectrum-associated Adjustment Of Metab...mentioning

confidence: 99%

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Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

et al. 2022

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Both light intensity and spectrum (280–800 nm) affect photosynthesis and, consequently, the formation of reactive oxygen species (ROS) during photosynthetic electron transport. ROS, together with antioxidants, determine the redox environment in tissues and cells, which in turn has a major role in the adjustment of metabolism to changes in environmental conditions. This process is very important since there are great spatial (latitude, altitude) and temporal (daily, seasonal) changes in light conditions which are accompanied by fluctuations in temperature, water supply, and biotic stresses. The blue and red spectral regimens are decisive in the regulation of metabolism because of the absorption maximums of chlorophylls and the sensitivity of photoreceptors. Based on recent publications, photoreceptor-controlled transcription factors such as ELONGATED HYPOCOTYL5 (HY5) and changes in the cellular redox environment may have a major role in the coordinated fine-tuning of metabolic processes during changes in light conditions. This review gives an overview of the current knowledge of the light-associated redox control of basic metabolic pathways (carbon, nitrogen, amino acid, sulphur, lipid, and nucleic acid metabolism), secondary metabolism (terpenoids, flavonoids, and alkaloids), and related molecular mechanisms. Light condition-related reprogramming of metabolism is the basis for proper growth and development of plants; therefore, its better understanding can contribute to more efficient crop production in the future.

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Section: Light Intensity-and Spectrum-associated Adjustment Of Metabo...mentioning

confidence: 99%

Section: Light Intensity- and Spectrum-associated Adjustment Of Metab...mentioning

confidence: 99%

Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

et al. 2022

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“…All the above-mentioned photoreceptors regulate PheC production mainly through the TF HY5 (ELONGATED HYPOCOTYL 5), which was proposed as an integrator of light and temperature signals [ 33 , 34 , 35 ] ( Figure 2 ), regulating the expression of approximately 3000 genes in Arabidopsis [ 36 ]. A major repressor of HY5-related photomorphogenic responses is the COP1/SPA complex (CONSTITUTIVELY PHOTOMORPHOGENIC 1, SUPPRESSOR OF PHYA-105), responsible for HY5 degradation.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Phenolic Compound Production by Light Varying in Spectral Quality and Total Irradiance

Pech

Volná

Hunt

et al. 2022

IJMS

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Photosynthetically active radiation (PAR) is an important environmental cue inducing the production of many secondary metabolites involved in plant oxidative stress avoidance and tolerance. To examine the complex role of PAR irradiance and specific spectral components on the accumulation of phenolic compounds (PheCs), we acclimated spring barley (Hordeum vulgare) to different spectral qualities (white, blue, green, red) at three irradiances (100, 200, 400 µmol m−2 s−1). We confirmed that blue light irradiance is essential for the accumulation of PheCs in secondary barley leaves (in UV-lacking conditions), which underpins the importance of photoreceptor signals (especially cryptochrome). Increasing blue light irradiance most effectively induced the accumulation of B-dihydroxylated flavonoids, probably due to the significantly enhanced expression of the F3′H gene. These changes in PheC metabolism led to a steeper increase in antioxidant activity than epidermal UV-A shielding in leaf extracts containing PheCs. In addition, we examined the possible role of miRNAs in the complex regulation of gene expression related to PheC biosynthesis.

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“…RCD1 has also several interaction partners (e.g., ANAC017 and -103, DREB2A, STO), and it inhibits the expression of several genes and transcription factors connected to stress, including mitochondrion dysfunction stimulon (MDS) genes (e.g., alternative oxidases AOXs, SOT12) [ 18 , 23 ]. In addition, RCD1 inhibits STO (SALT TOLERANCE) and COP1 (CONSTITUTIVELY PHOTOMORPHOGENIC1)-regulated genes after UV-B radiation [ 21 , 24 , 25 ], and the interaction with STO and COP1 represses the ELONGATED HYPOCOTYL5 ( HY5 ) transcription. HY5 is a major regulator of light and temperature responses in plants, and it mediates the biosynthesis of various specialized (secondary) metabolites (e.g., flavonoids, glucosinolates) [ 21 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, RCD1 inhibits STO (SALT TOLERANCE) and COP1 (CONSTITUTIVELY PHOTOMORPHOGENIC1)-regulated genes after UV-B radiation [ 21 , 24 , 25 ], and the interaction with STO and COP1 represses the ELONGATED HYPOCOTYL5 ( HY5 ) transcription. HY5 is a major regulator of light and temperature responses in plants, and it mediates the biosynthesis of various specialized (secondary) metabolites (e.g., flavonoids, glucosinolates) [ 21 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Metabolite Profiling of Paraquat Tolerant Arabidopsis thaliana Radical-induced Cell Death1 (rcd1)—A Mediator of Antioxidant Defence Mechanisms

2022

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RADICAL-INDUCED CELL DEATH1 (RCD1) is an Arabidopsis thaliana nuclear protein that is disrupted during oxidative stress. RCD1 is considered an important integrative node in development and stress responses, and the rcd1 plants have several phenotypes and altered resistance to a variety of abiotic and biotic stresses. One of the phenotypes of rcd1 is resistance to the herbicide paraquat, but the mechanisms behind it are unknown. Paraquat causes a rapid burst of reactive oxygen species (ROS) initially in the chloroplast. We performed multi-platform metabolomic analyses in wild type Col-0 and paraquat resistant rcd1 plants to identify pathways conveying resistance and the function of RCD1 in this respect. Wild type and rcd1 plants were clearly distinguished by their abundance of antioxidants and specialized metabolites and their responses to paraquat. The lack of response in rcd1 suggested constitutively active defense against ROS via elevated flavonoid, glutathione, β-carotene, and tocopherol levels, whereas its ascorbic acid levels were compromised under non-stressed control conditions when compared to Col-0. We propose that RCD1 acts as a hub that maintains basal antioxidant system, and its inactivation induces defense responses by enhancing the biosynthesis and redox cycling of low molecular weight antioxidants and specialized metabolites with profound antioxidant activities alleviating oxidative stress.

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HY5: A Pivotal Regulator of Light-Dependent Development in Higher Plants

Cited by 82 publications

References 123 publications

Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

Regulation of Phenolic Compound Production by Light Varying in Spectral Quality and Total Irradiance

Metabolite Profiling of Paraquat Tolerant Arabidopsis thaliana Radical-induced Cell Death1 (rcd1)—A Mediator of Antioxidant Defence Mechanisms

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