LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · 1999 · 20 citations · 0 references
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Life SciencesPlant SciencesPlant BiochemistryPlant NutritionPlant PhysiologyAbscisic Acid BiologyPlant Residue EffectsMitotic Index ReductionRoot Meristem ActivityRoot Tip Mitotic Index
Usnic acid obtained from Usnea filipendula Stirton has been tested for its effect on mitotic index in root tips of Allium cepa L. Mitotic index is decreased 100, 200 and 300 ppm doses of usnic acid. The inhibition effect of usnic acid is increased with doses and time of treatment. The inhibition effect is statistifically significant, p < 0.05 and p < 0.001, for 12 and 24 hour treatment, respectively.