Resumen del producto

The seaweed extracts contain a variety of compounds as macro and micronutrients and plant growth regulations that could be utilized by the plants. It is known that these extracts can have both negative andpositive effects (depending on concentration) when are applied directly on seeds and plants. In the present study five extracts of Ulva lactuca (UL2, UL4, UL6, UL8 and UL10) were obtained by hydrolysis with different concentrations of H2SO4. Chemical composition of seaweed and Fourier transform infrared analysis was used as method for the quantification of the main chemical constituents from acid seaweed extracts, revealed interactions of amino, carboxyl, and sulphonate groups. The extracts were tested at different concentrations under the germination and seedling growth of mung bean (Vigna radiata) and toxicity red radish (Raphanus sativus). All extracts at low concentrations (0.2 to 0.4 %) caused high germination percentage of mung bean. The treatments of UL6, UL8 and UL10 induced 100 % of germination in bean seeds. The growth of mung bean seedling with UL6 at 0.2 % caused superior root growth (8 cm) and the major number of adventitious roots (37) compared to the control (6.5 cm and 16 respectively), the treatment of UL2 at 0.2 % had the highest stem length (10.45 cm) and greater dry weight (0.256 g). Most total length of the seedlings was observed with extracts UL6 and UL2 at 0.2% with a maximum of 18 cm. Furthermore, the results of the toxicity test conducted in red radish suggest that extracts at high concentrations (> 1.0 %) have toxicity, which is reflected in the damage observed in plants such as browning and decay of roots.

Palabras clave: seaweed; biotechnology; Algae; promotor; agricultural

Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx