Plant inhibition by Johnson grass and its possible significance in old-field succession

Abdul-Wahab, A.S. and Rice, E.L (1967) Plant inhibition by Johnson grass and its possible significance in old-field succession. Bulletin of the Torrey Botanical Club, 94 (6). pp. 486-497.

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Sorghum halepense L. is sometimes an important species in the early stages of old-field succession, occurring in almost pure stands for a protracted period. The present project was undertaken to obtain evidence concerning the ability of Johnson grass to inhibit certain species of plants with which is is associated in abandoned fields. Seed germination and seedling growth of most species of plants chosen for investigation were inhibited by leaf or rhizome extracts, decaying leaves or rhizomes, and exudates from roots and rhizomes, with the exception of Aristida oligantha Michx. which was inhibited in only a few instances and then mostly slightly. Chlorogenic acid, p-coumaric acid, and p-hydroxybenzaldehyde were the main plant inhibitors present in the leaf and rhizome extracts, p-Hydroxybenzaldehyde was present in the extracts at all sampling periods, chlorogenic acid was more pronounced in the leaf extracts, and p-coumaric acid was present only during the early months of the growing season. Dhurrin, a cyanogenic glucoside of p-hydroxybenzaldehyde, was found to be prominent in the rhizomes and probably serves as a source of p-hydroxybenzaldehyde.

Item Type: Article
Author Affiliation: Department of Botany and Microbiology, University of Oklahoma, Norman
Subjects: Plant Production
Divisions: Sorghum
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 02 Apr 2012 14:23
Last Modified: 02 Apr 2012 14:23
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