Positron-emitting tracer imaging of fluoride transport and distribution in tea plant.
J Sci Food Agric
; 100(8): 3554-3559, 2020 Jun.
Article
em En
| MEDLINE
| ID: mdl-32124449
ABSTRACT
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.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Camellia sinensis
/
Fluoretos
Idioma:
En
Revista:
J Sci Food Agric
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
China