The value of seaweed based pharmaceutical products has drastically increased in the past decade.Chaetomorpha linum(Chlorophyta)extract has been described to have a high level of antioxidants and bioactive compounds,ho...The value of seaweed based pharmaceutical products has drastically increased in the past decade.Chaetomorpha linum(Chlorophyta)extract has been described to have a high level of antioxidants and bioactive compounds,however it is unknown how growth conditions,specifically the ionic profile of its culture media,may impact C.linum’s biochemical profile.This study tested growth,antioxidant activity,chlorophyll and mineral profile following culture in a 2×2 factorial methodology,with water type(inland saline water[ISW]or ocean water[OW])and nutrient enrichment(nitrate and phosphate)as co-factors.C.linum was cultivated for 20 days outdoors and fresh weight was recorded every five days.On day 10,50 g of seaweed was harvested,and mineral analysis and ultrasound-assisted extraction were performed.Extracts were tested for antioxidant activity and chlorophyll content.Antioxidant activity was not significantly different across treatments in ferric reducing antioxidant potential and total phenolic content assays,though specific growth rate was lower in ISW than OW treatments.Calcium content(mg.g^(-1) d.b.)was also significantly higher(p<0.001)in ISW than OW.This study found that short-term growth of C.linum in ISW can increase calcium content while maintaining the efficacy of its bioactive profile,presenting a new method for producing a mineral rich food or health supplement for human consumption.展开更多
基金supported by an Australian Government Research Training Program(RTP)Scholarship.
文摘The value of seaweed based pharmaceutical products has drastically increased in the past decade.Chaetomorpha linum(Chlorophyta)extract has been described to have a high level of antioxidants and bioactive compounds,however it is unknown how growth conditions,specifically the ionic profile of its culture media,may impact C.linum’s biochemical profile.This study tested growth,antioxidant activity,chlorophyll and mineral profile following culture in a 2×2 factorial methodology,with water type(inland saline water[ISW]or ocean water[OW])and nutrient enrichment(nitrate and phosphate)as co-factors.C.linum was cultivated for 20 days outdoors and fresh weight was recorded every five days.On day 10,50 g of seaweed was harvested,and mineral analysis and ultrasound-assisted extraction were performed.Extracts were tested for antioxidant activity and chlorophyll content.Antioxidant activity was not significantly different across treatments in ferric reducing antioxidant potential and total phenolic content assays,though specific growth rate was lower in ISW than OW treatments.Calcium content(mg.g^(-1) d.b.)was also significantly higher(p<0.001)in ISW than OW.This study found that short-term growth of C.linum in ISW can increase calcium content while maintaining the efficacy of its bioactive profile,presenting a new method for producing a mineral rich food or health supplement for human consumption.
