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Positron‐emitting tracer imaging of fluoride transport and distribution in tea plant
Author(s) -
Niu Huiliang,
Peng Chuanyi,
Zhu Xudong,
Dong Yangyang,
Li Yeyun,
Tang Lingling,
Wan Xiaochun,
Cai Huimei
Publication year - 2020
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.10367
Subject(s) - petiole (insect anatomy) , xylem , phloem , camellia sinensis , tracer , chemistry , botany , fluoride , absorption (acoustics) , horticulture , materials science , biology , physics , inorganic chemistry , hymenoptera , nuclear physics , composite material
BACKGROUND Tea ( Camellia sinensis (L.) O. Kuntze) is a hyper‐accumulator of fluoride (F). To understand F uptake and distribution in living plants, we visually evaluated the real‐time transport of F absorbed by roots and leaves using a positron‐emitting ( 18 F) fluoride tracer and a positron‐emitting tracer imaging system. RESULTS F arrived at an aerial plant part about 1.5 h after absorption by roots, suggesting that tea roots had a retention effect on F, and then was transported upward mainly via the xylem and little via the phloem along the tea stem, but no F was observed in the leaves within the initial 8 h. F absorbed via a cut petiole (leaf 4) was mainly transported downward along the stem within the initial 2 h. Although F was first detected in the top and ipsilateral leaves, it was not detected in tea roots by the end of the monitoring. During the monitoring time, F principally accumulated in the node. CONCLUSION F uptake by the petiole of excised leaf and root system was realized in different ways. The nodes indicated that they may play pivotal roles in the transport of F in tea plants. © 2020 Society of Chemical Industry