UV-B Radiation-Induced Changes in Tea Metabolites and Related Gene Expression

Fan, Fang-yuan; Li, Chunlin; Luo, Zhou; Tang, Gui-zhen

doi:10.1007/978-981-13-2140-5_6

Cited by 5 publications

(2 citation statements)

References 105 publications

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“…The higher content of catechins in albino tissues may result from two reasons. Previous study had shown that the expression of flavonoid pathway genes, such as FLS, 4CL , and ANR , could be induced in response to UV-B signal, leading to the accumulation of catechins in Camellia sinensis (Fan et al, 2018 ; Liu et al, 2018 ). While COP1 is a negative regulator of photomorphogenesis, it acts as a positive regulator in the UV-B signaling pathway (Jin and Zhu, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Disruption of Photomorphogenesis Leads to Abnormal Chloroplast Development and Leaf Variegation in Camellia sinensis

Gao

Zhang

et al. 2021

Front. Plant Sci.

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Camellia sinensis cv. ‘Yanlingyinbiancha’ is a leaf-variegated mutant with stable genetic traits. The current study aimed to reveal the differences between its albino and green tissues, and the molecular mechanism underlying the variegation. Anatomic analysis showed the chloroplasts of albino tissues to have no intact lamellar structure. Photosynthetic pigment in albino tissues was significantly lower than that in green tissues, whereas all catechin components were more abundant in the former. Transcriptome analysis revealed most differentially expressed genes involved in the biosynthesis of photosynthetic pigment, photosynthesis, and energy metabolism to be downregulated in albino tissues while most of those participating in flavonoid metabolism were upregulated. In addition, it was found cryptochrome 1 (CRY1) and phytochrome B (PHYB) genes that encode blue and red light photoreceptors to be downregulated. These photoreceptors mediate chloroplast protein gene expression, chloroplast protein import and photosynthetic pigment biosynthesis. Simultaneously, SUS gene, which was upregulated in albino tissues, encodes sucrose synthase considered a biochemical marker for sink strength. Collectively, we arrived to the following conclusions: (1) repression of the biosynthesis of photosynthetic pigment causes albinism; (2) destruction of photoreceptors in albino tissues suppresses photomorphogenesis, leading to abnormal chloroplast development; (3) albino tissues receive sucrose from the green tissues and decompose their own storage substances to obtain the energy needed for survival; and (4) UV-B signal and brassinosteroids promote flavonoid biosynthesis.

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Section: Discussionmentioning

confidence: 99%

Disruption of Photomorphogenesis Leads to Abnormal Chloroplast Development and Leaf Variegation in Camellia sinensis

Gao

Zhang

et al. 2021

Front. Plant Sci.

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“…Paeizi et al [ 12 ] reported that methyl jasmonate and Ag + in combination showed the highest content of catharanthine, vindoline, ajmalicine, vincristine and vinblastine in Catharanthus roseus, as compared to individual treatments of Ag + and methyl jasmonate. Similarly, the exogenous application of abscisic acid strongly enhanced the accumulation of flavonol in Vitis vinifera under UV-B radiation [ 13 ]. Consequently, it is crucial to comprehend how medicinal plants respond to UV-B exposure and heavy metal toxicity by adjusting the synthesis of a variety of secondary metabolites.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet-B and Heavy Metal-Induced Regulation of Secondary Metabolites in Medicinal Plants: A Review

Pandey

Agrawal

2023

Metabolites

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Despite a rich history and economic importance, the potential of medicinal plants has not been fully explored under different abiotic stress conditions. Penetration of UV-B radiation and contamination of heavy metals are two important environmental stress for plants with remarkable influence on the defense-related and pharmaceutically important secondary metabolites of medicinal plants. UV-B and heavy metal contamination may become a critical issue that either positively or negatively affects the quality and quantity of secondary metabolites. Such effects may result from changes in the expression level of genes that encode the corresponding enzymes or the inactivation and/or stimulation of specific enzymes involved in the different biosynthetic pathways of the secondary metabolites. Therefore, a comprehensive study of the impact of UV-B and heavy metals individually and in combination on the biosynthesis and accumulation of secondary metabolites in medicinal plants is discussed in the present review.

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Physiological, Biochemical, and Molecular Responses of the Plants Against Enhanced Ultraviolet B and Heavy Metal Stress

Jaiswal

Pandey

Agrawal

2020

Plant Ecophysiology and Adaptation Under Climate Change: Mechanisms and Perspectives I

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UV-B Radiation-Induced Changes in Tea Metabolites and Related Gene Expression

Cited by 5 publications

References 105 publications

Disruption of Photomorphogenesis Leads to Abnormal Chloroplast Development and Leaf Variegation in Camellia sinensis

Disruption of Photomorphogenesis Leads to Abnormal Chloroplast Development and Leaf Variegation in Camellia sinensis

Ultraviolet-B and Heavy Metal-Induced Regulation of Secondary Metabolites in Medicinal Plants: A Review

Physiological, Biochemical, and Molecular Responses of the Plants Against Enhanced Ultraviolet B and Heavy Metal Stress

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