Abstract

ORTIZ SANCHEZ, Ixchel Abby et al. Concentration of Starch and soluble proteins in tubers of Caladium bicolor under different phenological stages. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.3, pp.483-494. ISSN 2007-0934.

In this paper the concentration of starch and soluble proteins (mg g^-1 DM) in tubers of Caladium bicolor was evaluated through the application of organic products (humic and fulvic acids) diluted in irrigation water. Treatments consisted in the interaction of three doses of organic product (0 (control), 4 and 8 ml L^-1) and three phenological stages of the crop (flowering, predormancy and dormancy. The variables were measured based on UV-visible spectrophotometry, using mathematical models derived from calibration curves of each organic compound. The data was analyzed under a completely randomized design with a factorial arrange 3*3. The treatments with 8 and 4 ml L^-1 of organic product (humic and fulvic acids) on dormancy stage showed higher concentration of starch with 885.18 and 833.97 mg g^-1 DM respectively. Furthermore, the highest concentration of soluble proteins in treatment of 4 and 8 ml L^-1 was obtained at flowering stage with 156.04 and 150.54 mg g^-1 DM respectively. Under the conditions in which this research was conducted, it is concluded that the application of organic products generates greater concentration of vegetative storage in tubers of this crop, which will serve to produce bigger and more shoots for the next production cycle.

Keywords : Caladium; fertilization; ornamental plants; vegetative reserves.

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