Effects of Oxidants and Ionizing Conditions on Seed Germination at Subatmospheric Oxygen Levels

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Abstract
When seed germi-nation and seedling growth are limited by subatmospheric oxygen levels, a number of substances act as stimulants. These include a variety of substituted p-benzoquinones, organic peroxides, and inorganic oxidants. Of the latter, most have marginal effects, if any, but hydrogen peroxide is quite active under conditions which preclude its serving as a general source of atmospheric O2- Indirect [alpha] radiation from Po210 was highly effective as a stimulant, even under anaerobic conditions. Representative subatmospheric stimulants were found to be inactive or inhibitory when applied in air. Results were discussed both in terms of the role of various oxidants as substitutes for O2 and the changing role of various oxidants (stimulation vs. inhibitions) when oxygen tension is modified.

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