Low-salt tolerance of the thin-blade strain in Pyropia haitanensis

Abstract

Although the thin-blade strain (HR-5) of Pyropia haitanensis could be cultivated in the south coast of China, the effect of low-salt tolerance on it is not clear. In this study, the conchospores and blades of the wild cultivated strain (WT-10) of P. haitanensis and HR-5 strain were cultured in media with salinity of 26‰, 10‰, and 3‰, respectively. The results illustrated that: After being cultured for 7 days, the survival percentages of conchospores were not significantly different between WT-10 and HR-5 at the salinity of 26‰ and 10‰ (P > 0.05), but the survival percentage was 60.8% higher in the latter than in the former at the salinity of 3‰ (P 0.05). The above results indicated that the low-salt tolerance of conchospores and blades of HR-5 was not weaker than that of WT-10, which provided a theoretical basis for the management mode when continuous precipitation was encountered in the cultivation process of HR-5 strain.