[Response of Prorocentrum minimum growth to zinc limitation].
Studies on the growth and physiological response of red tide alga Prorocentrum minimum to three Zn2+ levels were showed that the specific growth rate and biomass were limited in low Zn(2+)-grown cells (1.4 pmol.L-1, which were 0.40 d-1 and 51,100 cell.ml-1 respectively. The specific growth rate was not significantly different when the Zn2+ concentration in medium was increased over 24.4 pmol.L-1, but there was a slight decrease in biomass; however, both specific growth rate and biomass were much higher than those in low Zn(2+)-grown cells. It was also showed that chlorophyll a synthesis was limited due to Zn2+ deficient, and therefore, the cells became light saturated at higher irradiance under Zn-limited condition. Light-saturated photosynthetic rates (Pm) and photosynthetic efficiency (alpha) increased significantly with increasing Zn2+ concentrations. It was concluded that Zn2+ concentration might be one of the key factors affecting red tide blooms in eutrophication environment.
State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China. hanhuahu@sohu.com
Hanhua
H
Hu
Yanjun
Y
Shi
Wei
W
Cong
Zhaoling
Z
Cai
Fan
F
Ouyang
D018533:Biomass; D004141:Dinoflagellida / Q000254:growth & development*; D005068:Eutrophication; D057097:Harmful Algal Bloom / Q000502:physiology*; D008027:Light; D010788:Photosynthesis; D015032:Zinc / Q000032:analysis*
D015032:Zinc