Metabolic effects of atmospheric fluorides on plants

McCune, D.C.; Weinstein, Leonard H.

doi:10.1016/0013-9327(71)90001-2

Cited by 24 publications

(2 citation statements)

References 14 publications

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“…Its concentration in sensitive plants ranges between 0.001 and 0.010 g kg −1 , 28 whereas resistant plants such as tea plant can tolerate several thousands of milligrams of fluoride per kilogram 29 . Studies have shown that fluoride is mainly absorbed by roots from soil solution, 30 small amounts can enter leaves via the cuticle or stomata when it is present in the air, typically in gaseous forms of hydrogen fluoride (HF) or silicon tetrafluoride (SiF 4 ) 18,28,31 . Fluoride uptake by tea plant roots is usually positively and energy‐dependent, even linearly, correlated with exogenous fluoride and followed Michaelis–Menten kinetics, 30,32 which can be regulated by Ca 2+ ‐ATPase and H + ‐ATPase, 33,34 but is a passive process for solutions containing high fluoride levels 30,32,35 .…”

Section: Absorption Transportation and Accumulation Of Fluoride In mentioning

confidence: 99%

Fluoride absorption, transportation and tolerance mechanism in Camellia sinensis, and its bioavailability and health risk assessment: a systematic review

Peng

Ren

et al. 2020

J Sci Food Agric

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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 (MgCl 2) extractable fluoride in plantation soil are the main sources of absorption by tea plant root via active transmembrane 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.

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Section: Absorption Transportation and Accumulation Of Fluoride In mentioning

confidence: 99%

Fluoride absorption, transportation and tolerance mechanism in Camellia sinensis, and its bioavailability and health risk assessment: a systematic review

Peng

Ren

et al. 2020

J Sci Food Agric

View full text Add to dashboard Cite

show abstract

“…and present a localized pollution problem. Fluoride injury occurs through direct interaction with plant enzymes or tissues or through induced changes in cellular nutrient and hormone balance (McCune and Weinstein 1971).…”

Section: Fluoridementioning

confidence: 99%