Effects of Ascophyllum nodosum extract on kale seed germination at different temperatures
DOI:
https://doi.org/10.36560/14520211274Keywords:
Alga marrom, Brassica oleraceae var acephala, condicionamento fisiológicoAbstract
Temperature is a factor that directly interferes with the germination capacity of seeds. With the rise in temperatures caused by global warming, as well as in situations of protected cultivation of plants in tropical and subtropical environments, it is necessary to study procedures that can contribute to increased tolerance to temperatures that cause stress and changes in physiological processes. Thus, the objective of this work was to evaluate the effect of the physiological conditioning of kale seeds with different doses of brown seaweed extract Ascophyllum nodosum on the germination and growth of plants at different temperatures. The experiment was carried out in a completely randomized design, with a 2 x 4 factorial scheme (temperatures x doses), with five replications. The treatments consisted of doses of 0; 0.25; 0.50; 1.0 ml. L-1 extract from the brown seaweed Ascophyllum nodosum. The effect of the treatments was evaluated by means of: percentage and speed of germination, length and dry mass of the aerial part and seedling roots, under conditions of ideal temperature (20° C) and stress (30 °C). The conditioning of kale seeds with extract of the brown seaweed Ascophyllum nodosum does not interfere in the germination of seeds, both in ideal condition and at high temperature (30 ° C); the conditioning of kale seeds with doses of 0.67 and 0.25 mL.L-1, promotes greater growth of seedling roots, at germination temperatures of 20 and 30 ° C, respectively, however, does not promote increments in shoot growth and accumulation of total seedling dry mass.
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