Soil nutrient deficiency decreases the postharvest quality-related metabolite contents of tea (Camellia sinensis (L.) Kuntze) leaves
文献类型： 外文期刊
作者： Zhou, Bo 1 ; Chen, Yiyong 1 ; Zeng, Lanting 3 ; Cui, Yingying 1 ; Li, Jianlong 1 ; Tang, Hao 1 ; Liu, Jiayu 1 ; Tang, Jinchi 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Tea Res Inst, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
2.Guangdong Prov Key Lab Tea Plant Resources Innova, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, 723 Xingke Rd, Guangzhou 510650, Peoples R China
4.Chinese Acad Sci, Key Lab South China Agr Plant Mol Anal & Genet Im, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
关键词： China; Camellia sinensis (L) Kuntze; Nutrient deficiency; Tea quality; Chlorophyll; L-theanine; Aroma compound
期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）
ISSN： 0308-8146
年卷期： 2022 年 377 卷
页码：
收录情况： SCI
摘要： 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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