Effects of hydrogen fluoride on production and organic reserves of bean seed

Pack, M.R.

doi:10.1021/es60058a010

Cited by 8 publications

(3 citation statements)

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“…Controlled laboratory-based research allows for the isolation and sequential introduction of variables to better understand HF-induced plant response. Published laboratory studies of gaseous HF exposures date back to the 1960s and 1970s and involve various types of fumigation chambers to demonstrate HF effects on different plants such as various bean species ( Phaseolus vulgaris, P. lunatus ), maize ( Zea mays ), citrus ( Citrus sinensis , C. paradisi, and C. unshiu ), tobacco ( Nicotiana tabacum ), rice ( Oryza sativa ), and lichens ( Cladonia cristatella , C. polycarpoides , and Parmelia plittii ) (Adams, 1961 ; Adams et al, 1957 ; Döğeroğlu et al, 2003 ; MacLean et al, 1968 ; Matsushima & Brewer, 1972 ; McCune et al, 1964 ; Nash, 1971 ; Pack, 1971 ; Sun & Su, 1985 ). Exposure periods varied from hours to weeks, with HF concentrations ranging from 1 ppbv to 10 ppmv.…”

Section: Introductionmentioning

confidence: 99%

“…Many of these studies were limited at the time by available analytical methodologies and instrumentation for measuring gaseous HF. For example, HF exposure concentrations were often quantified by titration or by limed filter paper, a method intended to estimate the rate of atmospheric fluoride deposition (Adams, 1957 ; Pack, 1971 ; Smith, 1988 ). Moreover, the fumigation chambers in earlier studies were not optimized for controlling plant growth conditions such as light, temperature, and humidity throughout HF exposure, resulting in limitations in extrapolating mechanisms of HF uptake and HF-induced stress effects for potential bioindicator plants in field environments.…”

Section: Introductionmentioning

confidence: 99%

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Novel gas exposure system for the controlled exposure of plants to gaseous hydrogen fluoride

DeMille,

Emsbo-Mattingly,

Krieger

et al. 2023

Environ Monit Assess

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Plants can serve as sensitive bioindicators of the presence of contaminant vapors in the atmosphere. This work describes a novel laboratory-based gas exposure system capable of calibrating plants as bioindicators for the detection and delineation of the atmospheric contaminant hydrogen fluoride (HF) as a preparatory step for monitoring release emissions. To evaluate changes in plant phenotype and stress-induced physiological effects attributed to HF alone, the gas exposure chamber must have additional controls to simulate otherwise optimal plant growth conditions including variables such as light intensity, photoperiod, temperature, and irrigation. The exposure system was designed to maintain constant growth conditions during a series of independent experiments that varied between optimal (control) and stressful (HF exposure) conditions. The system was also designed to ensure the safe handling and application of HF. An initial system calibration introduced HF gas into the exposure chamber and monitored HF concentrations by cavity ring-down spectroscopy for a 48-h period. Stable concentrations inside the exposure chamber were observed after approximately 15 h, and losses of HF to the system ranged from 88 to 91%. A model plant species (Festuca arundinacea) was then exposed to HF for 48 h. Visual phenotype stress-induced responses aligned with symptoms reported in the literature for fluoride exposure (tip dieback and discoloration along the dieback transition margin). Fluoride concentrations in exposed tissues compared to control tissues confirmed enhanced fluoride uptake due to HF exposure. The system described herein can be applied to other reactive atmospheric pollutants of interest in support of bioindicator research.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel gas exposure system for the controlled exposure of plants to gaseous hydrogen fluoride

DeMille,

Emsbo-Mattingly,

Krieger

et al. 2023

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…5 Likewise, bean plants grown at 2 fig F/m 3 and higher had fewer fruit, fewer seeds per fruit, and lower seed starch levels than controls. 6 These investigations indicated that HF affects fruiting directly, possibly by interfering with fertilization or seed development. At the lowest HF concentrations at which bean fruiting was affected, there were no fluoride injury symptoms on the foliage; and in some instances, reductions in fruiting were accompanied by increased vegetative growth.…”

mentioning

confidence: 96%