z-logo
Premium
The effect of salinity shock on the growth and rapid light curve of dunaliella salina
Author(s) -
Qin Ruiyang,
Li Yongfu,
Zhang Litao,
Liu Jianguo
Publication year - 2021
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.15105
Subject(s) - dunaliella salina , salinity , dunaliella , biology , glycerol , photosynthesis , carotenoid , botany , food science , biochemistry , algae , ecology
To confirm the effect of hypersaline shock on the growth of Dunaliella salina , the rapid light curves and chlorophyll fluorescence in D . salina with a NaCl upshift from 80 to 160, 240 and 320 g·L −1 , respectively, were measured. Results showed that the photosynthetical saturated light of Dunaliella salina was downregulated to deal effectively with the severe NaCl increase from 80 to 160, 240 and 320 g·L −1 . Dunaliella salina can deal effectively with the cells’ rapid increase in NaCl from 80 to 160 g·L −1 by heat dissipation to dissipate the excess energy. Salinity with 240–320 g·L −1 NaCl led to overproduction of Q A − and the destruction of the PSII acceptor side, causing inhibition of photosynthetic electron transport. Dunaliella salina can also manage the abrupt rise in NaCl concentration from 80 to 240 g·L −1 by accumulating the amount of β‐carotene and glycerol per cell. However, Dunaliella salina cannot effectively manage the rapid increase in NaCl from 80 to 320 g·L −1 due to the stronger inhibition and impaired of the PSII acceptor side. It is suitable to shade D . salina cells to 500 and 800 μmol·m −2 ·s −1 when cells are exposed to a severe NaCl shift from 80 to 160 g·L −1 and 80 to 240 g·L −1 . NaCl ranged from 80 to 240 g·L −1 favoured the growth and carotenoid content of D . salina ; however, the survival rate and photosynthetic activity were lowered by the sudden increase in NaCl.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here