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Document Type

Research

Abstract

Along with the development of the conception of vitamins for animals there was introduced the corresponding idea of the necessity of unknown organic substances for plants. These accessory substances, termed auximones, were claimed to be essential for the growth and development of all chlorophyll producing plants. By the use of Lemna major it was found at Iowa State College that this claim was not valid, and that these plants would grow and reproduce successfully in a medium composed of highly purified inorganic salts. The presence of organic matter, however, stimulated the reproduction, and the effect of organic substances has been investigated both in the presence and absence of microorganisms. No stimulation was found in the absence of microorganisms even though organic matter was introduced which improved growth under non-sterile conditions.

Publication Date

1931

Journal Title

Proceedings of the Iowa Academy of Science

Volume

38

Issue

1

First Page

168

Last Page

169

Copyright

© Copyright 1931 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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