Nutrient uptake and transporter gene expression of ammonium, nitrate, and phosphorus in Ulva linza: adaption to variable concentrations and temperatures
文献类型： 外文期刊
作者： Fan, Xiao 1 ; Xu, Dong 4 ; Wang, Dongsheng 4 ; Wang, Yitao 4 ; Zhang, Xiaowen 4 ; Ye, Naihao 4 ;
作者机构： 1.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 201306, Peoples R China
2.Shanghai Ocean Univ, Int Res Ctr Marine Biosci, Minist Sci & Technol, Shanghai 201306, Peoples R China
3.Shanghai Ocean Univ, Minist Educ, Key Lab Explorat & Utilizat Aquat Genet Resources, Shanghai 201306, Peoples R China
4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao, Peoples R China
关键词： Nutrient uptake rate (NUR); Nutrient transporter gene expression; Concentration; Temperature; Chlorophyceae; Ulva linza
期刊名称：JOURNAL OF APPLIED PHYCOLOGY （ 影响因子：3.215； 五年影响因子：3.612 ）
ISSN： 0921-8971
年卷期：
页码：
收录情况： SCI
摘要： An increase in the human population has caused eutrophication in shore water due to the release of nitrogen and phosphorus. Green tides caused by the proliferation of green macroalgae are an important direct consequence of eutrophication worldwide. We studied the nutrient uptake rate (NUR) and the expression of nutrient transporter genes in the green alga Ulva linza, an alga which forms green tides almost every summer in the Yellow Sea, and identified 6 nutrient transporter genes which contributed to the uptake of ammonium, nitrate, and phosphorus. Two environmental conditions, temperature and nutrient concentration, were found to significantly influence the NUR and gene expression of nutrient transporters. The optimum concentrations for uptake of ammonium, nitrate, and phosphorus were 1398.7, 710.4, and 230.7 mu mol L-1 respectively, while the optimum temperature was 15 degrees C. Six nutrient transporter genes (amt1, amt2, and amt3 for ammonium uptake, nit for nitrate uptake, hapt, and lapt for phosphorus) were found to have an optimal working environment in terms of temperature and nutrient concentration, respectively.
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