不同氮磷比及铁浓度对球形棕囊藻二甲基硫和二甲巯基丙酸内盐生产的影响  被引量:6

Effects of Different N/P Ratios and Concentration of Iron on DMS and DMSP Production in the Culture of Phaeocystis globosa

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作  者:朱蓉[1] 杨桂朋[1] 于娟[1] 张洪海[1] 

机构地区:[1]中国海洋大学化学化工学院,山东青岛266100

出  处:《中国海洋大学学报(自然科学版)》2013年第10期67-75,共9页Periodical of Ocean University of China

基  金:国家自然科学基金重点项目(41030858);教育部"长江学者"奖励计划;山东省"泰山学者"建设工程专项经费资助

摘  要:本文通过实验室培养研究了不同氮磷比(0∶1、5∶1、20∶1、50∶1)以及铁浓度(10、100、1 000nmol·L-1)对球形棕囊藻二甲基硫(DMS)和二甲巯基丙酸内盐(DMSP)产生的影响。富磷浓度(36.12μmol·L-1)条件下的球形棕囊藻DMS和DMSP的产量明显高于贫磷浓度条件下(0.361 2μmol·L-1)的DMS和DMSP的产量,N/P比为50∶1时球形棕囊藻的DMS和DMSP产量明显高于其他N/P比(0∶1、5∶1、20∶1)的DMS和DMSP产量,但N/P比为50∶1时单位Chl-aDMS/DMSP产量在4个N/P比(0∶1、5∶1、20∶1、50∶1)中却最低。贫磷培养液的DMSPd在N/P比为0∶1时峰值显著高于其它N/P比(5∶1、20∶1、50∶1)条件下的DMSPd,并且N/P比为50∶1时DMS的释放量最大。低Fe3+浓度有助于球形棕囊藻藻液中DMSPd的形成,Fe3+浓度为1 000nmol·L-1时单位Chl-a的DMSPp产量最小,而单位Chl-a的DMS生产能力在Fe3+浓度为100nmol·L-1时得到加强。The production of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) by Phaeo- cystis globosa was studied under different N/P ratios (0 : 1, 5 : 1, 20 : 1, 50 : 1) and concentrations of iron (0, 100, 1 000 nmol . L^-1) in this article. The concentrations of DMS and DMSP in phosphorus-replete (36.12 μmol . L^-1) cultures were significantly higher than those in phosphorus-deplete (0. 361 2 μmol. L^-1) cultures. DMS and DMSP concentrations in the cultures with N/P=50 : 1 were higher than those in other N/P ratios (0 : 1, 5 : 1, 20 : 1), but DMS and DMSP concentrations per unit Chl-a (chlo- rophyll a) were the lowest at N/P=50 ~ 1. The maximum concentrations of DMS and DMSP in low-phos- phorus (0. 361 2 μmol . L^-2) cultures with N/P of 0: 1 were significantly higher than those in other N/P ratios (5 : 1, 20 : 1, 50 : 1), The release of DMS reached maximum in the cultures of N/P=50 : 1. Low concentrations of iron was favorable to production of DMSPd, and DMSPp concentrations per unit Chl-a was minimum at iron concentrations of 1 000 nmol : L^-1 while production capacity of DMS per unit Chl-a was enhanced at iron concentrations of 100 nmol . L^-1

关 键 词:二甲基硫(DMS) 二甲巯基丙酸内盐(DMSP) 球形棕囊藻 氮磷比  

分 类 号:P734.4[天文地球—海洋化学]

 

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