Comparison of tolerance to high temperature of excellent strains of Sargassum fusiforme
Three excellent strains of Sargassum fusiforme and wild-type S.fusiforme were cultured at 25℃ to com-pare the growth status of S.fusiforme under high temperature conditions,and to provided data support for the screen-ing of high temperature resistance strains.The results showed that long-term high temperature culture could reduce the photosynthetic performance of each strain of S.fusiforme,inhibit the activity of nitrate nitrogen absorption and as-similation related enzymes,reduce the content of soluble protein and soluble carbohydrate,enhance its dark respira-tion rate,and ultimately inhibit the growth of algae.Under high temperature condition,compared with other strains,the maximum electron transfer rate and saturated light intensity oxygen release rate of spindle vesicle type S.fusi-forme were the highest,the peroxidase activity was the highest and increased significantly,while its malondialdehyde content did not increase significantly.In general,spindle vesicle type of S.fusiforme was less affected by high tem-perature and had strong tolerance.Spindle vesicle type of S.fusiforme could be popularized in actual breeding pro-duction,and the research results could provide a basis for subsequent variety improvement.
Sargassum fusiformeseedlings breedinghigh temperature stressphotosynthesisseaweed aquaculture
万方数据
维普
