QUALIDADE DE SEMENTES DE ALGODÃO SUBMETIDAS AO CONDICIONAMENTO OSMÓTICO E HÍDRICO
2008
Vicente de Paula Queiroga | José Maria Duran | Riselane de Lucena A. A. Bruno | José Wellington dos Santos | Diego Antonio Nóbrega Queiroga
The objective of the work was to evaluate the effect of the osmotic and hydric conditioning on the physiological quality of seeds of herbaceous cotton. The practices were carried out in the Laboratory of Phytotecny of the Polytechnical University of Madrid, Spain, in 2006. Used seeds of cotton chemically deslinted of cultivar Panton. Was realized two practices of osmotic conditioning: seeds submitted to osmotic solutions of PEG 6000 (-0,25 MPa) and of potassium nitrate (3 M) in the seven times of osmotic conditioning (0, 12, 24, 36, 48, 72 and 96 h) to temperature of 20 °C. As the hydric conditioning, the seeds were imbibitions with and without water renewal, in function of the times of immersion: 0, 1, 2, 4, 8 and 24 hours. The variable analyzed were percentage of germination and length of seedlings. The experimental design was entirely randomized with four repetitions. The osmotics solutions of PEG and potassium nitrate were not favorable for germination of the seeds, however the vigor of the seeds was increased by both osmotics solutions in some conditions studied. The hydric conditioning was more effective to increased the vigor of the cotton seeds, but were not efficient to increased its germinative potential.
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