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- W166364057 abstract "Powdery mildew and downy mildew causes great losses to lettuce (Lactuca sativa). Lettucenin A is an important antimicrobial compound that would help in reducing theattack of these diseases. Optimization by using the best elicitors and the right plant age during elicitation would produce higher amount of lettucenin A. Lettucenin A wasextract from 15 grams of materials after elicitation by silver nitrate (AgNO₃). copper sulfate (CUS0â‚„). ultraviolet radiation and freezing at different age of plant (week 9, 12. 15 and 18). Lettucenin A accumulated higher when challenged with AgNO3 or CUSOâ‚„ solution. Physical elicitation by irradiation with short wavelength ultraviolet radiation and freeze-thawed were also effective in eliciting the production of lettucenin A. However. the amounts were considerably lower for physical elicitation than whenelicited by chemical elicitors. Ultraviolet radiation and freeze-thawing accumulated 1.52 I¼g/ml and 0.49 I¼g/ml respectively while AgNO₃ and CUSOâ‚„ accumulated 4.27 I¼g/ml and 4.26 I¼g/ml respectively. The elicitations of lettucenin A were both dependent on types of elicitor and the age of the plant. Silver nitrate a chemical elicitor and ultraviolet radiation a non-chemical elicitor. both showed same pattern of lettucenin A production. Lettucenin A accumulation increase significantly from week nine to themaximum at week 12 before it decreased to the least at week 18. The production of lettucenin A was rated highest in week 12 with a total concentration of 4.28 I¼g/ml. Theresults suggested that accumulation of lettucenin A was greatest using chemical elicitors, particularly silver nitrate at the plant age of 12 weeks." @default.
- W166364057 created "2016-06-24" @default.
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- W166364057 date "2007-01-01" @default.
- W166364057 modified "2023-09-26" @default.
- W166364057 title "Aging effect on accumulation of lettucenin a by lettuce afterelicitation by various abiotic elicitors" @default.
- W166364057 hasPublicationYear "2007" @default.
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