title: Response of three semi-arid plant species to fluoride; consequences for chlorophyll florescence.
abstract: The study was done to investigate the ability of three semi-arid plant species viz. Acacia tortilis, Cassia fistula and Prosopis juliflora to adapt to fluoride (F) stress. Here we examined the changes in activities of chlorophyll a fluorescence and photosynthetic pigment concentration during early growth of these plants. One month old plants were treated with 10, 20, and 50 mg kg(-1) F in soilrite. We did not observe any major change in photosynthetic performance of these plants during early growth. This was revealed by ETR, ETRmax, PPFD-sat and deltaF/Fm'-sat values which were higher in these plants. The decrease in chl a, chl b and total chl concentrations were significant only at 5 days. For most of the parameters, C. fistula was found to be more sensitive to F stress and P. juliflora showed least damage from F. The lesser inhibition in the parameters reflected the F tolerant nature of these plants with respect to photosynthesis. This opens the possibility of potential use of these species for treatment of F contaminated soil and water.
authors.forename: M
authors.initials: M
authors.lastname: Baunthiyal
authors.forename: V
authors.initials: V
authors.lastname: Sharma
mesh_terms: D000045:Acacia / Q000502:physiology*; D001673:Biodegradation, Environmental; D002366:Cassia / Q000502:physiology*; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D005453:Fluorescence; D005459:Fluorides / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology; D010788:Photosynthesis / Q000187:drug effects; D045332:Photosystem II Protein Complex / Q000187:drug effects; D018515:Plant Leaves / Q000502:physiology; D029862:Prosopis / Q000502:physiology*; D013312:Stress, Physiological
chemical_list: D045332:Photosystem II Protein Complex; D002734:Chlorophyll; D005459:Fluorides; D000077194:Chlorophyll A