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Int. J. Mol. Sci. 2018, 19(12), 3938; https://doi.org/10.3390/ijms19123938

Molecular Identification and Characterization of Hydroxycinnamoyl Transferase in Tea Plants (Camellia sinensis L.)

1
Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan
2
Department of Agronomy, National Chung Hsing University, Taichung 40227, Taiwan
*
Author to whom correspondence should be addressed.
Received: 2 November 2018 / Revised: 3 December 2018 / Accepted: 6 December 2018 / Published: 7 December 2018
(This article belongs to the Special Issue Plant Genomics)
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Abstract

Tea (Camellia sinensis L.) contains abundant secondary metabolites, which are regulated by numerous enzymes. Hydroxycinnamoyl transferase (HCT) is involved in the biosynthesis pathways of polyphenols and flavonoids, and it can catalyze the transfer of hydroxyconnamoyl coenzyme A to substrates such as quinate, flavanol glycoside, or anthocyanins, thus resulting in the production of chlorogenic acid or acylated flavonol glycoside. In this study, the CsHCT gene was cloned from the Chin-Shin Oolong tea plant, and its protein functions and characteristics were analyzed. The full-length cDNA of CsHCT contains 1311 base pairs and encodes 436 amino acid sequences. Amino acid sequence was highly conserved with other HCTs from Arabidopsis thaliana, Populus trichocarpa, Hibiscus cannabinus, and Coffea canephora. Quantitative real-time polymerase chain reaction analysis showed that CsHCT is highly expressed in the stem tissues of both tea plants and seedlings. The CsHCT expression level was relatively high at high altitudes. The abiotic stress experiment suggested that low temperature, drought, and high salinity induced CsHCT transcription. Furthermore, the results of hormone treatments indicated that abscisic acid (ABA) induced a considerable increase in the CsHCT expression level. This may be attributed to CsHCT involvement in abiotic stress and ABA signaling pathways. View Full-Text
Keywords: tea; hydroxycinnamoyl transferase; abiotic stress; ABA signaling; hormone tea; hydroxycinnamoyl transferase; abiotic stress; ABA signaling; hormone
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Sun, C.-H.; Yang, C.-Y.; Tzen, J.T.C. Molecular Identification and Characterization of Hydroxycinnamoyl Transferase in Tea Plants (Camellia sinensis L.). Int. J. Mol. Sci. 2018, 19, 3938.

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