Resumo

VILLANUEVA-COUOH, E. et al. Effect of salicilic acid and dimethyl sulphoxide in the flowering of [Chrysanthemum morifolium (Ramat) Kitamura] in Yucatan. Rev. Chapingo Ser.Hortic [online]. 2009, vol.15, n.spe, pp.25-31. ISSN 2007-4034.

With the purpose to evaluate the effectin the flowering and growth of the plant of chrysanthemum var. Polaris White several concentrations of salicylic acid (SA) 10^-6, 10^-8 y 10^-10 M and dimethyl sulphoxide (DMSO) 10^-4 M were sprinkled on chrysanthemum foliage. The salicylic acid applications to the foliage were made 16 days after the transplant. Four applications were made by dripping with an interval of seven days between each application. A completely randomized design with five treatments and five repetitions was used. The DMSO sprinkled plants grew more (83.6 cm) than the plants sprinkled with 10^-6 M (81.0 cm) of AS and surpassed the control plant. The stem diameter of the AS and DMSO sprinkled plants was greater in comparison with the control plant, and the 10^-8 M treatment obtained the greatest values (8.9 mm). The salicylic acid (10^-6, 10^-8 y 10^-10 M), and the dimethyl sulfoxide 10^-4 M incremented in a significant manner the weight of the foliage and root matter (fresh and dry), the root volume, and the foliar area. The effect of the salicylic acid was notorious in the induction of the blooming treatments: 10^-8 y 10^-10 M were obtained the blooming at 113 PTD and it also obtained the greatest flower diameter (13.6 and 12.6 cm) respectively. The N, P and K concentrations were different and the treatments with AS and DMSO surpassed the control. The N and K concentrations in the chrysanthemum leaves and stems fluctuated from low to deficient, but the P concentrations fluctuated between sufficient and adequate.

Palavras-chave : Chrysantemum morifolium; salicylic acid; blooming.

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