In this series of publications, the action of (2chloroethyl)trimethylammonium chloride’ and certain other structurally related compounds will be described as a class of plant growth substances. The growth of plants after treatment with certain of these chemical compounds will be published in subsequent articles?, 3 The most characteristic effect is the development of stockier plants with shorte...

1. Certain anaerobic bacteria grow under aerobic conditions in plain broth in the presence of sterile unheated plant tissue. 2. Aerobic growth of anaerobic bacteria under the above conditions may be related to the presence of growth-accessory substances, and to the action of oxidizing-reducing systems of plant tissue in the destruction of toxic peroxides of bacterial origin.