期刊
FOOD CHEMISTRY
卷 377, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.132003
关键词
China; Camellia sinensis (L) Kuntze; Nutrient deficiency; Tea quality; Chlorophyll; L-theanine; Aroma compound
资金
- Agricultural competitive industry discipline team building project of Guangdong Academy of Agricultural Sciences [202125TD]
- Guangdong Innovation Team of Modern Agricultural Industry Technology System [2021KJ120]
The long-term cultivation of tea plants without fertilization can decrease yield and affect the quality of tea, particularly its color, taste, and aroma. This study provides important information regarding the effects of soil nutrient deficiency on tea quality and the rational fertilization of tea gardens.
The long-term cultivation of tea plants without fertilization can severely decrease yield, but it remains unclear whether this soil nutrient deficiency affects tea quality. In this study, tea plants (Camellia sinensis (L.) Kuntze) cultivated in unfertilized soil for 11 years were analyzed. The soil nutrient deficiency down-regulated proto-chlorophyllide oxidoreductase-encoding gene expression, which adversely affected chlorophyll biosynthesis, ultimately leading to leaf etiolation. Because of decreased synthesis and increased degradation in response to nutrient deficiency, L-theanine content decreased to 11.4% of the control level, which increased the phenol-ammonia ratio and decreased taste quality. Soil nutrient deficiency also decreased the abundance of many aroma compounds (e.g., green leaf volatile, linalool and its oxides, and methyl salicylate). Thus, nutrient defi-ciency adversely influences tea color, taste, and aroma. This study provides researchers and tea growers with important information regarding the effects of soil nutrient deficiency on tea quality and the rational fertilization of tea gardens.
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