Abstract
Camellia gymnogyna Chang (CgC), a wild tea plant, was discovered on Dayao Mountain, China. However, research regarding this tea plant is limited. Our study found that CgC contains theobromine, caffeine, and theacrine, among which theobromine content was the highest (14.37–39.72 mg/g). In addition, theobromine synthase (TS) was partially purified from CgC leaves, up to 35.87-fold, with consecutive chromatography, and its molecular weight was found to be approximately 62 kDa. The optimum reaction time, pH, and temperature for theobromine synthase from 7-methylxanthine was found to be 6 h, 4, and 45 °C, respectively. TS expression at both mRNA and protein stages was higher in the first than in the fourth leaf (P < 0.05). Subcellular localization of TS indicated that it was localized in the nucleus. These results indicate that CgC can be of scientific value and could lead to efficient utilization of this rare wild tea germplasm.
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