Effect of simulated drought using PEG–4000 on germination and seedling growth of two rice cultivars (Oryza sativa L.)
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Abstract
This work was made at Genetics lab from Technological Scientific Basic Unit "Los Palacios" (UCTB), belonging to the National Institute of Agricultural Sciences (INCA), located in Los Palacios, Pinar del Río province. The aim was to evaluate the effect of simulated drought with PEG-4000 on germination and seedling growth of two rice cultivars seeds. Selected cultivars were Guillemar LP-19 and Perla de Cuba (as tolerant control). They were treated at different concentrations of osmotic agent (PEG 15, 20, 25, 30 g L-1) and a control treatment with distilled water was also put. It was evaluated the germination percentage, plant height, the root system length and their dry mass. It was shown differential behaviours among cultivars under drought levels caused by different PEG concentrations. The cultivar "Guillemar LP–19" showed the better behaviour for the four analyzed parameters than tolerant control cultivar. First stages of plant growth presented affectations with the increasing of the PEG-4000 concentrations, as osmotic agent to simulate the stress for drought.
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