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首页> 外文期刊>Journal of the Science of Food and Agriculture >Fluoride absorption, transportation and tolerance mechanism inCamellia sinensis, and its bioavailability and health risk assessment: a systematic review
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Fluoride absorption, transportation and tolerance mechanism inCamellia sinensis, and its bioavailability and health risk assessment: a systematic review

机译：氟化物吸收，运输和耐受机制Incamellia sinensis，其生物利用度和健康风险评估：系统审查

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摘要

Tea is the one of the most popular non-alcoholic caffeinated beverages in the world. Tea is produced from the tea plant (Camellia sinensis(L.) O. Kuntze), which is known to accumulate fluoride. This article systematically analyzes the literature concerning fluoride absorption, transportation and fluoride tolerance mechanisms in tea plants. Fluoride bioavailability and exposure levels in tea infusions are also reviewed. The circulation of fluoride within the tea plantation ecosystems is in a positive equilibrium, with greater amounts of fluoride introduced to tea orchards than removed. Water extractable fluoride and magnesium chloride (MgCl2) extractable fluoride in plantation soil are the main sources of absorption by tea plant root via active trans-membrane transport and anion channels. Most fluoride is readily transported through the xylem as F-/F-Al complexes to leaf cell walls and vacuole. The findings indicate that tea plants employ cell wall accumulation, vacuole compartmentalization, and F-Al complexes to co-detoxify fluoride and aluminum, a possible tolerance mechanism through which tea tolerates higher levels of fluoride than most plants. Furthermore, dietary and endogenous factors influence fluoride bioavailability and should be considered when exposure levels of fluoride in commercially available dried tea leaves are interpreted. The relevant current challenges and future perspectives are also discussed. (c) 2020 Society of Chemical Industry
机译：茶是世界上最受欢迎的非酒精含咖啡因饮料之一。茶叶是由茶树（Camellia sinensis（L.）O.Kuntze）生产的，已知茶树会积累氟化物。本文系统分析了茶树对氟的吸收、转运和耐氟机制的文献。本文还综述了茶汤中氟化物的生物利用度和暴露水平。茶园生态系统中氟的循环处于正平衡状态，引入茶园的氟含量高于去除的氟含量。茶园土壤中水溶性氟和氯化镁（MgCl2）溶性氟是茶树根系通过活性跨膜转运和阴离子通道吸收的主要来源。大多数氟化物很容易通过木质部作为F-/F-Al复合物运输到叶细胞壁和液泡。研究结果表明，茶树利用细胞壁积累、液泡分隔和F-Al复合物来共同解毒氟和铝，这是一种可能的耐受机制，通过这种机制，茶叶比大多数植物耐受更高水平的氟。此外，饮食和内源性因素会影响氟的生物利用度，在解释市售干茶叶中氟的暴露水平时，应考虑这些因素。还讨论了相关的当前挑战和未来前景。（c） 2020年化学工业学会

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