Effect of seaweed liquid fertilizer of Sargassum wightii on the growth and biochemical characteristics of Abelmoschus esculentus (L.) medikus

            The effect of different concentrations (20%, 40% 60%, 80% and 100%) of seaweed liquid fertilizer (SLF) of Sargassum wightii on the growth and biochemical characteristics of Abelmoschus esculentus was studied. The low concentration (20%) of S. wightii extract promoted the shoot length, root length, fresh weight, dry weight, chlorophyll, carotenoid, protein, amino acid, reducing sugar, total sugar,  - amylase and -amylase activities in  Abelmoschus esculentus

Heavy Metal and Biochemical Content of Sargassum Wightii Occurring in Tuticorin Coast, Tamil Nadu, India

Investigations have been made to study the heavy metal composition of Sargassum wightii occurring in Tuticorin, Tamil Nadu. Different parts of S. wightii such as stem, leaf receptacle and air-bladder were subjected to the scrutiny of heavy metals such as Cd, Cr, Cu and Fe present in those parts of brown algae under atomic absorption spectrophotometer. The highest concentration of Cd was observed in leaf and lowest in air-bladder of S. wightii. The maximum level of Cr was observed in air bladder and low in stem. The concentration of copper was higher in stem, low in leaf of S. wightii. The accumulation of iron in receptacle was higher and lower in air bladder of S. wightii. Biochemicals such as total carbohydrate, total protein and total lipid contents were also estimated. The results showed that the protein content of  S. wightii was higher than lipid and carbohydrate

Investigation of heavy metal pollution in eastern Aegean Sea coastal waters by using Cystoseira barbata, Patella caerulea, and Liza aurata as biological indicators

In order to have an extensive contamination profile of heavy metal levels (Cd, Cu, Fe, Mn, Ni, Pb, and Zn), seawater, sediment, Patella caerulea, Cystoseira barbata, and Liza aurata were investigated by using inductively coupled plasma-atomic emission spectrometry (ICP-AES). Samples were collected from five coastal stations along the eastern Aegean Sea coast (Turkey) on a monthly basis from July 2002 through May 2003. According to the results of this study, heavy metal levels were arranged in the following sequence: Fe > Pb > Zn > Mn > Ni > Cu > Cd for water, Fe > Cu > Mn > Ni > Zn > Pb > Cd for sediment, Fe > Zn > Mn > Pb > Ni > Cd > Cu for C. barbata, Fe > Zn > Mn > Ni > Pb > Cu > Cd for P. caerulea, and Fe > Zn > Mn > Cu > Ni > Pb > Cd for L. aurata. Moreover, positive relationships between Fe in water and Mn in water, Fe in sediment and Mn in sediment, Fe in C. barbata and Mn in C. barbata, Fe in P. caerulea and Mn in P. caerulea, and Fe in L. aurata and Mn in L. aurata may suggest that these metals could be originated from the same anthropogenic source. C. barbata represented with higher bioconcentration factor (BCF) values, especially for Fe, Mn, and Zn values. This observation may support that C. barbata can be used as an indicator species for the determinations of Fe, Mn, and Zn levels. Regarding Turkish Food Codex Regulation's residue limits, metal values in L. aurata were found to be lower than the maximum-permissible levels issued by Turkish legislation and also the recommended limits set by FAO/WHO guidelines. The results of the investigation indicated that P. caerulea, L. aurata, and especially C. barbata are quantitative water-quality bioindicators and biomonitoring subjects for biologically available metal accumulation for Aegean Sea coastal waters