Abstract

RAMIREZ, Maribel et al. Effect of NaCl on curarí (Tabebuia serratifolia) seedlings under laboratory conditions. Pastos y Forrajes [online]. 2014, vol.37, n.1, pp.17-23. ISSN 0864-0394.

The objective of this work was to evaluate the effect of sodium chloride (NaCl) during the germination and initial growth of curarí (Tabebuia serratifolia) seedlings under laboratory conditions. The seeds were placed in five concentrations of NaCl: 2, 4, 6, 8 and 10 dS m^-1, and in distilled water (control), with an electric conductivity between 0.02 and 0.04 dS m^-1. A completely randomized experimental design was used, with five repetitions, and a variance analysis was applied. The germination percentage (GP) and germination rate (GR) were determined; and the stem length (SL), root length (RL), cotyledonal area (CA), fresh biomass (FB) and dry biomass (DB) were measured. The concentration of NaCl showed significant effects for the variables GP, GR, DB, SL, RL and CA. A germination of 79.6 % and a GR of 1,66 days were obtained when the seeds were subject to 6 dS m^-1 of NaCl. The concentrations of 8 and 10 dS m^-1 significantly decreased GP, SL and CA of the seedlings and delayed the GR. It is concluded that the T. serratifolia seedlings showed tolerance to the saline condition of NaCl up to 6 dS m^-1, for which this species can be used with agroforestry purposes in livestock production systems, as well as in the recovery of areas that show moderate salinity problems.

Keywords : multipurpose trees; stress; survival.

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