Abstract
Stem height increases of 13% and 15% for barley and snapdragon respectively were observed for plants maintained in an atmosphere of high concentrations of negative air ions compared to control plants. Dry weights of the exposed plant species to negative ions increased by approximately 18% compared to untreated plants. The effects of positive air ions were insignificant. The rates of photosynthesis and respiration measurements on continuously exposed plants to negative air ions conformed to these observations.
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Elkiey, T.M., Bhartendu, S. & Barthakur, N. Air ion effect on respiration and photosynthesis of barley andAntirrhinum majus . Int J Biometeorol 29, 285–292 (1985). https://doi.org/10.1007/BF02189659
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DOI: https://doi.org/10.1007/BF02189659