Several compounds closely related to choline and of the structure CHoX-CHo-N+ (CH3)3 * Clare active as plant growth substances when X is a Cl, Br, or = CH2 group (14). Treated plants develop thicker stems, shorter internodes, and intensely dark green leaves (7, 16, 17). The growth changes simulate those caused by exposure of plants to high light intensities, a short photoperiod, and low tempera...

In an earlier paper (7) the development of isolated heart-shaped and older embryos of Capsella4 (> 80 ,u long) when grown in a sterile nutrient medium containing mineral salts, vitamins and 2 % sucrose was described. It was also shown that supplementing the basal medium with a mixture of growth substances like indoleacetic acid (IAA), kinetin and adenine sulfate permitted development of still s...

   Phenolic extracts of canola (Brassica napuse L.) contains substances that inhibited the germination and seedling growth of soybean (Glycin max L.). These compounds also affect activity of some enzymes. Hear, we investigated the allelopathic effects of various canola plant parts on soybean germination, seedling growth, and biochemical aspects. Phenolic extract of canola shoot (including leaf,...

D. C. Effect of 2,4-dichlorophenoxyacetic acid on respiration and on destruction of indoleacetic acid in oat and sunflower tissues. Science 120: 710-712. 1954. 9. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-dichlorophenoxyacetic acid on the respiration of etiolated pea seedlings. Plant Physiol. 31 Suppl.: xxii. 1956. 10. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-di...

Electrocoagulation of a plant extract and certain substances representative of selected classes of plant pigments, viz. chlorophyll, a carotenoid, a phenolic substance and a tannin, was performed in ethanol containing varying amounts of water (15-75%). The results showed that the extent and efficiency of coagulation of these substances tends to vary in a manner directly related to the water con...

In the study of bacterial symbiosis and antagonism, considerable interest has centered in the presence or absence of growth when organisms are reinoculated into filtrates of cultures of the same or different species. The nature of the substances which favor or inhibit the simultaneous or subsequent development of bacteria in the same nutritive medium has provoked much discussion and stimulated ...

Actinomycetes are promising tool to control plant disease and to promote plant growth. In ayurved system of medicine rhizome portion of Curcuma longa L. was used as an antiseptic. Antimicrobial substances released from these plants diffuse into the surrounding soil area of the plant. Actinomycetes which grow in these areas are resistant to these substances. Different types of pesticide and chem...