Effects of phenolic acids and ragweed parthenium (Parthenium hysterophorus) extracts on tomato (Lycopersicon esculentum) growth and nutrient and chlorophyll content
1988
Mersie, W. | Singh, M.
The effects of caffeic, vanillic, p-coumaric, chlorogenic, and ferulic acids, ragweed parthenium (Parthenium hysterophorus L. #3 PTNHY) residue and extracts on the growth, ion uptake, and chlorophyll content of 3-week-old tomatoes (Lycopersicon esculentum Mill. 'Walter') grown in the greenhouse were determined. Vanillic, p-coumaric, chlorogenic, and ferulic acid at 10(-3) M and parthenium extract at 0.5% (w/v) significantly reduced tomato root and shoot dry weight. Ragweed parthenium residue at 0.5% (w/w) and extract at 0.5% (w/v) significantly reduced tomato and shoot dry weight. Leaf nitrogen content was reduced by phenolic acids at (10(-3)M) and ragweed parthenium extract (0.5%). Phosphorus content was reduced by allphenolic acids at 10(-3) M and ragweed parthenium extract at 0.5% (w/v). In addition, p-coumaric and ferulic acids at 10(-4) M reduced phosphorus content. No consistent relationship between chlorophyll content and tomato growth reduction was observed.
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