The effect of abnormally low concentrations of air ions on the growth ofHordeum vulgaris
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Abstract
A chamber has been designed for growing seedlings in a chemically defined medium while maintaining them in air containing ca. 30+ and 30− air ions/cm3. Air-ion depletion produces a significant reduction in growth of HORDEUM VULGARIS seedlings as measured by integral elongation, fresh weight and dry weight. There is no gross change in chlorophyll production but after 30 days of growth the plants have very soft leaves and lack normal rigidity.
Keywords
Chlorophyll Plant Physiology Environmental Medicine Contenant Environ Chlorophyll ProductionZusammenfassung
Eine Kammer wurde entworfen, in der Sämlinge in einem chemisch definierten Medium und Luft mit einem Gehalt von ci. 30+ und 30− Luftionen/cm3 wachsen können. Verminderung des Luftionengehalts führte zu einer signifikanten Verminderung des Wachstums von HORDEUM VULGARIS Sämlingen, gemessen an der integralen Verlängerung und dem Feucht- und Trockengewicht. Die Chlorophyllbildung war nicht verändert, aber nach 30. Tagen zeigten die Pflanzen sehr weiche Blätter und es fehlte die normale Festigkeit.
Resume
On a fabriqué une cellule dans laquelle on peut placer des plantules dans un milieu chimique déterminé et exposées à de l'air contenant environ 30 ions positifs et 30 ions négatifs au cm3. Une diminution du nombre des ions provoque un ralentissement significatif de la croissance des germes de HORDEUM VULGARIS. Cette croissance était définie aussi bien par l'allongement total que par le poids humide et par celui de la matière sèche. La formation de chlorophylle ne fut pas affectée, mais, après 30 jours, les plantes n'avaient pas leur rigidité normale et les feuilles en étaient très tendres.
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