Related Experiment Video
Updated: May 5, 2026

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes
Published on: June 10, 2022
Allelochemicals in tall fescue-abscisic and phenolic acids
1Agricultural Research Service U.S. Department of Agriculture, Plant Hormone Laboratory Beltsville Agricultural Research Center, 20705, Beltsville, Maryland.
Abstract:
Growth inhibitors that can be leached from excised leaves of tall fescue grass (Festuca arundinacea) were investigated as allelochemicals. Leachates of desiccated Rebel and Kentucky 31 grass cultivars contained three principal inhibitory compounds, abscisic acid (ABA), caffeic acid, andp-coumaric acid. After quantitative analysis, abscisic acid was determined to be the predominant inhibitor. A 10-fold increase in ABA levels in leachates occurred after one day of desiccation. The concentration of ABA was 40% greater in Kentucky 31 leachate than in Rebel. This difference was also found in subsequent analyses of leachates of grasses that had been allowed to dry up to 30 days; however, the ABA concentration was reduced by 60% from the 10-fold increased levels.
More Related Videos
Related Concept Videos
Adaptations that Reduce Water Loss
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Plant Hormones
Responses to Salt Stress
Introduction to Plant Diversity
Responses to Heat and Cold Stress

