Abstract

FLORIDO, Marilyn et al. Effect of water stress simulated with peg 6000 on tomato seed germination (Solanum section Lycopersicon). cultrop [online]. 2018, vol.39, n.1, pp. 87-92. ISSN 1819-4087.

ABSTRACT In the current investigation, the drought stress tolerance was evaluated on seed germination of 27 tomato accessions. This study was carry out first on two tomato accessions contrasting (Ciapan 31-5 and Campbell-28) subjected to different polyethylenglycol (PEG 6000) treatments (0,25; 0,5; 0,75 and 1 MPa), including a control treatment with distilled water. The results showed that the percentage of germination decreased with the increase of the osmotic potential from -0,5 MPa. This potential was used to evaluate the sample of germplasm composed of 27 accessions. A different response was obtained in the behavior of the accessions against simulated water stress with PEG-6000, being the accessions Ciapan-31-5, Rilia, Mex-121 A, Rojo Veracruz, LA-2128 and LA-1255 those that presented higher percentages of germination in these conditions. These accessions can be used as progenitors to increase tolerance to water stress in this phase of the crop

Keywords : abiotic stress; germination; drought; Solanum lycopersicum L.

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