Utilization of seaweed Sargassum myriocystum extracts as a stimulant of seedlings of Vigna mungo (L.) Hepper

• Autores: C. Kalaivanan, V. Venkatesalu
• Localización: Spanish journal of agricultural research, ISSN-e 2171-9292, ISSN 1695-971X, Vol. 10, Nº. 2, 2012, págs. 466-470
• Idioma: inglés
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• Resumen

  • The effect of seaweed liquid fertilizer (SLF) of Sargassum myriocystum on germination, growth and biochemical constituents of Vigna mungo was studied. Different concentrations (5%, 10%, 25%, 50% and 75%) of SLF were prepared using distilled water. A total of 100 seeds were soaked for each SLF concentration for a 24-h period and were later placed in various Petri plates and watered regularly. Water-soaked seeds were used as controls. Seed germination was 98% for the 10% SLF soaked seeds. Similarly, shoot length (21.13 cm seedling-1), root length (12.19 cm seedling-1), fresh weight and dry weight (3.910 and 0.320 g seedling-1) recorded at 10% concentration of S. myriocystum treated seedlings were the highest. Besides, the chlorophyll (0.547 mg g-1 fr. wt.) and carotenoid (0.359 mg g-1 fr. wt.) contents in leaves recorded at 10% SLF soaked seedlings were the highest. The 10% SLF treated seedlings showed the highest content of protein (1.898 and 1.508 mg g�1 fr. wt.), amino acid (0.370 and 0.306 mg g�1 fr. wt.), reducing sugar (6.031 and 3.448 mg g-1 fr. wt.), total sugar (8.414 and 7.055 mg mL-1 fr. wt.), alpha-amylase activity (1.403 and 1.380 µg min-1 mg-1 protein) and beta-amylase activity (1.099 and 1.029 µg min-1 mg-1 protein) of shoots and roots respectively. The seaweed extract showed better response at lower concentration while higher concentrations of seaweed extract showed a decreasing trend.