Abstract

FLORES-LOPEZ, Román; MARTINEZ-GUTIERREZ, Ricardo; LOPEZ-DELGADO, Humberto A.  and  MARIN-CASIMIRO, Maricela. Periodic application of low concentrations of paclobutrazol and salicylic acid in potatoes in greenhouse. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.5, pp.1143-1154. ISSN 2007-0934.

The objective of this research was to determine the use of low concentrations of salicylic acid and paclobutrazol in Solanum tuberosum (Crystal and clone 981824) in the greenhouse for increased performance and potato starch. The experiments were performed in 2012 in Zinacantepec, Mexico. Treatments consisted of spraying with AS: 10-8, 10-10, 10-12 y 10-14 M, paclobutrazol: 1, 0.75, 0.5, 0.25 mg L-1 and the control, arranged in a randomized complete blocks, determined height, chlorophyll, IAF, fresh weight, number of tubers and starch content. In clone 981824, the control plants and AS (10-8 and10-10) had higher, while for Cristal were AS, witness and paclobutrazol 0.25 mg L-1. Chlorophyll and IAF there were no significant differences. In clone 981824, the witness had higher fresh weight (148 g per plant) instead Cristal showed no differences between treatments. The total number of minitubers was higher with paclobutrazol 0.5 mg L-1 in both genotypes (Crystal: 12.93 and 981824: 23.3). All paclobutrazol treatments and AS 10-8, 10-10 and 10-14 had higher starch content compared with the control in the clone 981824, while in Cristal were paclobutrazol 0.75 and 1.0 mg L-1 to 241 and 231 mg g-1, 10-8 and 10-12 of AS 165 and 173 mg g-1. In conclusion paclobutrazol reduces plant height and both this and the AS increase the starch content of the tuber at the indicated concentrations.

Keywords : Solanum tuberosum; greenhouse; minitubers.

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