synergistic effects of four cinnamic acid compounds on grain sorghum

Einhelling, F.A. and Schon, M.K. and Rasmussen, J.A. (1982) synergistic effects of four cinnamic acid compounds on grain sorghum. Journal of Plant Growth Regulation, 1 (4). pp. 251-258.

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Experiments tested the allelopathic effects of trans-cinnamic acid (tCnA), caflcic acid (CA), p-coumaric acid @CA), and femlic acid (FA) separately and in combination on pain sorghum. The data showed different levels for inhibitory effects among the four compounds, differential acnsitivity of plant processes, and more inhibition with combinations of these compounds. The most toxic compound at equimolar wncentrations was tCnA. Seed nermination. radicle elonnation. and seedling mwth had different threshojds for inhibition by the phenolic acids, w<<increaaing sensitivity of these plant processes in the order indicated. Concentrations of 0.1 mM FA, 0.1 mM CA, 0.1 mM pCA, and 0.04 mM tCnA were slightly below the threshold for inhibition of seedling growth. Synergistic inhibitory effects occurred when the phenolic acids were applied in combinations of two, three, and the four together. Such synergistic effecta are important in understanding allelopathy.

Item Type: Article
Author Affiliation: Department of Biology, University of South Dakota, Vermillion, south Dakota 57069, USA Biology Department, Mount Marty College, Yankton, south Dakota 57078, USA
Subjects: Plant Production > Farming Systems
Soil Science and Microbiology
Divisions: Sorghum
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 27 Mar 2012 09:17
Last Modified: 27 Mar 2012 09:17

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