Biostimulant activity of brown seaweed species from Strangford Lough: compositional analyses of polysaccharides and bioassay of extracts using mung bean (Vigno mungo L.) and pak choi (Brassica rapa chinensis L.)

Agricultural uses of plant biostimulants

“…IAA concentrations in acid extracts ranged from 3 to 47 ng/g. There were significant differences in the concentrations of the minerals Fe, I, K, Mg and S among the five species (Sharma et al 2012). Characteristic pyrolysis products of fucoidan, mannitol, laminarin, and alginic acid were identified in all five seaweed species, but amounts varied among species.…”

“…(Hong et al 2007a(Hong et al , 2007bSharma et al 2012). Commercial extract manufacturing processes are generally proprietary, but may include the use of water, acids, or alkalis as extractants with or without heating, or the physical disruption of seaweed using low temperature milling or high pressure (Herve and Rouillier 1977;Stirk and van Staden 2006;Craigie 2011).…”

“…Extracts are active as biostimulants at low concentrations (diluted at 1:1,000 or more), suggesting that the effects observed are likely distinct from those associated with a direct nutritional function van Staden 1993, Khan et al 2009). Seaweed extracts are a complex mixture of components that may vary according to the seaweed source, the season of collection, and the extraction process used (Khan et al 2009;Rioux et al 2009;Sharma et al 2012;Shekhar et al 2012). They contain a wide range of organic and mineral components including unique and complex polysaccharides not present in terrestrial plants such as laminarin, fucoidan and alginates, and plant hormones (Sivasankari et al 2006;Rioux et al 2007;Khan et al 2009).…”

“…They contain a wide range of organic and mineral components including unique and complex polysaccharides not present in terrestrial plants such as laminarin, fucoidan and alginates, and plant hormones (Sivasankari et al 2006;Rioux et al 2007;Khan et al 2009). Recently (Sharma et al 2012) and (Shekhar et al 2012) reported on the compositional analysis of five brown seaweed species from Northern Ireland. Carbon, nitrogen, lipid, and ash contents varied significantly among species with time of collection and type of extraction, and ranged between 25 and 39 %, 1 and 3 %, 1 and 4 %, and 18 and 48 %, respectively.…”

The Effects of Different Seaweed Doses on Yield and Nutritional Values of Hydroponic Wheatgrass Juice

“…Seaweeds are consumed as food source for humans and animals and also as polysaccharides source like agar, alginic acid and carrageenan. They are valuable organic fertilizer sources because they include growth-promoting hormones such as indole acetic acid, indole butyric acid, cytokinin, auxin and abscisic acid, trace elements (Fe, Cu, Zn, Co, Mo, Mn, Ni), vitamins and amino acids (Sharma et al, 2012;Latique et al, 2013;Peinado et al, 2014;Shahbazi et al, 2015). Many researches have claimed that seaweeds have resistance to bad environment conditions and have effects of enlarging of plant and nutrient uptake and increasing fertility (Arthur et al, 2013;Zamani et al, 2013;Rajarajan et al, 2014;Sabır et al, 2014).…”