Jiao Weiting, Wang Luyao, Zhu Lei, Shen Tingting, Shi Taozhong, Zhang Ping, Wang Chen, Chen Hongping, Wu Xiangwei, Yang Tianyuan, Li Qing X, Hua Rimao
Key Laboratory of Agri-food Safety of Anhui Province, School of Resource & Environment of Anhui Agricultural University, Hefei, China.
State Key Laboratory of Tea Plant Biology and Utilization; School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, China.
Food Addit Contam Part B Surveill. 2023 Mar;16(1):50-57. doi: 10.1080/19393210.2022.2145507. Epub 2022 Nov 17.
Pyrrolizidine alkaloids (PAs) can be transferred between plants via soil. Indicators of PAs in tea products are useful for tea garden management. In the present work a total of 37 weed species, 37 weed rhizospheric soils and 24 fresh tea leaf samples were collected from tea gardens, in which PAs were detected in 35 weeds species, 21 soil samples and 10 fresh tea leaves samples. In Shexian tea garden, 12.9 μg/kg of intermedine (Im) in one bud plus three leaves, 1.40 and 14.6 μg/kg of intermedine-N-oxide (ImNO) in one bud plus two leaves and one bud plus three leaves were detected, which were transferred from the PA-producing weeds via soil. However, no PAs were detected in fresh tea leaves collected from Langxi tea garden. The results indicated that synthesis of PAs in weeds and their transfer through the weed-soil-fresh tea leaf route varied with soil environments in different tea gardens.
吡咯里西啶生物碱（PAs）可通过土壤在植物间转移。茶产品中PAs的指标对茶园管理很有用。在本研究中，从茶园采集了37种杂草、37种杂草根际土壤和24份鲜茶叶样品，其中在35种杂草、21份土壤样品和10份鲜茶叶样品中检测到了PAs。在歙县茶园，一芽三叶中检测到12.9μg/kg的中蜂碱（Im），一芽二叶和一芽三叶中分别检测到1.40μg/kg和14.6μg/kg的中蜂碱氮氧化物（ImNO），它们是通过土壤从产PA的杂草转移而来的。然而，在郎溪茶园采集的鲜茶叶中未检测到PAs。结果表明，杂草中PAs的合成及其通过杂草-土壤-鲜茶叶途径的转移因不同茶园的土壤环境而异。
