Effects of hydrogen fluoride on water relations and photosynthesis in White Pine (Pinus strobus) seedlings
- Univ. of Alberta, Edmonton (Canada)
Transpiration, photosynthesis, water potential components and tissue fluoride concentrations were determined in mildly drought stressed 9-week-old seedlings fumigated with HF. Only those seedlings which showed no visible signs of fluoride injury were selected for the measurements. Photosynthesis decreased after 1 and 7 days of fumigation with 2, 4 and 20 ppb HF. A decrease in the transpiration rates has been observed after 2, 7 and 22 days of 0.5 ppb HF treatment and after 2 days of 2 ppb HF treatment. The same treatments which reduced transpiration rates resulted in an increase in osmotic potentials and water potentials. Possible mechanism of HF-induced alterations in seedling water relations by altering stomatal movements is discussed.
- OSTI ID:
- 5598588
- Report Number(s):
- CONF-9107184-; CODEN: PPYSA
- Journal Information:
- Plant Physiology, Supplement; (United States), Vol. 96:1; Conference: Annual meeting of the American Society of Plant Physiology, Albuquerque, NM (United States), 28 Jul - 1 Aug 1991; ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
Similar Records
An investigation of the effects of simulated acid rain and elevated ozone on the physiology of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) seedlings and mature trees
Comparison of the response of mature branches and seedlings of Pinus ponderosa to atmospheric pollution
Related Subjects
54 ENVIRONMENTAL SCIENCES
DROUGHTS
ENVIRONMENTAL EFFECTS
HYDROFLUORIC ACID
TOXICITY
PINES
BIOLOGICAL STRESS
PHYSIOLOGY
OSMOSIS
PHOTOSYNTHESIS
SEEDLINGS
TRANSPIRATION
CHEMICAL REACTIONS
CONIFERS
DIFFUSION
FLUORINE COMPOUNDS
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
PHOTOCHEMICAL REACTIONS
PINOPHYTA
PLANTS
SYNTHESIS
TREES
560300* - Chemicals Metabolism & Toxicology
540210 - Environment
Terrestrial- Basic Studies- (1990-)