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Activities of principal photosynthetic enzymes in green macroalga Ulva linza: functional implication of C-4 pathway in CO2 assimilation

文献类型： 外文期刊

作者： Xu JianFang 1 ; Zhang XiaoWen 2 ; Ye NaiHao 2 ; Zheng Zhou 1 ; Mou ShanLi 2 ; Dong MeiTao 3 ; Xu Dong 2 ; Miao JinLai 1 ;

作者机构： 1.State Ocean Adm, Key Lab Marine Bioact Subst, Inst Oceanog 1, Qingdao 266061, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

3.Qingdao Agr Univ, Qingdao 266109, Peoples R China

关键词： C-4 pathway;PPDK;RuBPCase;Ulva linza

期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：6.038； 五年影响因子：4.754 ）

ISSN： 1674-7305

年卷期： 2013 年 56 卷 6 期

页码：

收录情况： SCI

摘要： The green-tide-forming macroalga Ulva linza was profiled by transcriptome sequencing to ascertain whether the alga carries both C-3 and C-4 photosynthesis genes. The key enzymes involved in C-4 metabolism including pyruvate orthophosphate dikinase (PPDK), phosphoenolpyruvate carboxylase (PEPC), and phosphoenolpyruvate carboxykinase (PCK) were found. When measured under normal and different stress conditions, expression of rbcL was higher under normal conditions and lower under the adverse conditions, whereas that of PPDK was higher under some adverse conditions, namely desiccation, high salinity, and low salinity. Both ribulose-1, 5-biphosphate carboxylase (RuBPCase) and PPDK were found to play a role in carbon fixation, with significantly higher PPDK activity across the stress conditions. These results suggest that elevated PPDK activity alters carbon metabolism in U. linza leading to partial operation of the C-4 carbon metabolism, a pathway that, under stress conditions, probably contributes to the hardy character of U. linza and thus to its wide distribution.

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[6]Characterization of the LhcSR Gene Under Light and Temperature Stress in the Green Alga Ulva linza. Dong, Meitao,Wang, Wenqi,Dong, Meitao,Zhang, Xiaowen,Zhuang, Zhimeng,Zou, Jian,Ye, Naihao,Xu, Dong,Mou, Shanli,Liang, Chengwei.

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[10]Occurrence of the PsbS and LhcSR products in the green alga Ulva linza and their correlation with excitation pressure. Zhang, Xiaowen,Ye, Naihao,Mou, Shanli,Xu, Dong,Fan, Xiao.

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