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Biol Bull 104: 100-108. (February 1953)
© 1953 Marine Biological Laboratory
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CHEMOTROPISM IN RHIZOPUS NIGRICANS. II. THE ACTION OF PLANT JUICES

DAVID R. STADLER 1

1 Kerckhoff Laboratories of Biology, California Institute of Technology, Pasadena 4, California

Turnip juice and several other plant materials exert what appears to be a strong tropic attraction on the germinating spores of Rhizopus nigricans when tested on the type of experimental plates used in this and earlier studies. However, evidence is presented which demonstrates that the plant juices do not exercise a direct tropic action on the mold. It is suggested that these materials function by inactivating the staling substance (a negative tropic agent which is a normal product of the mold's metabolism).




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R. H. Whittaker and P. P. Feeny
Allelochemics: Chemical Interactions between Species
Science, February 26, 1971; 171(3973): 757 - 770.
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