title: [Illumination's effect on the growth and nitrate reductase activity of typical red-tide algae in the East China Sea].
abstract: Two typical red-tide algae, Skeletonema costatum and Prorocentrum donghaiense were selected as studied objects. The nitrate reductase activity (NRA) and the growth of the two algae under different illuminations through incubation experiment were studied. The illumination condition was consistent with in situ. Results showed that P. donghaiense and S. costatum could grow normally in the solar radiation ranged from 30-60 W x m(-2), and the growth curve was "S" type. However, when solar radiation was below 9 W x m(-2), the two alga could hardly grow. In the range of 0-60 W x m(-2), three parameters (NRAmax, micro(max), Bf) increased with the increasing of light intensity, indicating that the light intensity can influence the grow of alga indirectly through influencing the nitrate reductase activity. The micro(max) and NRAmax in unite volume of Skeletonema costatum were higher than those of Prorocentrum donghaiense, indicating that Skeletonema costatum can better utilize the nitrate than Prorocentrum donghaiense.
authors.affiliation: College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China. haiyanglihongmei@163.com
authors.forename: Hong-mei
authors.initials: HM
authors.lastname: Li
authors.forename: Xiao-yong
authors.initials: XY
authors.lastname: Shi
authors.forename: Yan-yan
authors.initials: YY
authors.lastname: Ding
authors.forename: Hong-jie
authors.initials: HJ
authors.lastname: Tang
mesh_terms: D002681:China; D017377:Diatoms / Q000201:enzymology / Q000254:growth & development* / Q000528:radiation effects; D004141:Dinoflagellida / Q000201:enzymology / Q000254:growth & development* / Q000528:radiation effects; D057097:Harmful Algal Bloom / Q000528:radiation effects*; D009565:Nitrate Reductases / Q000378:metabolism*; D013472:Sunlight
chemical_list: D009565:Nitrate Reductases