Evidence map›Paper›PMID 22616009›Full record

ArticlePloS one2012

Evidence of coexistence of C₃ and C₄ photosynthetic pathways in a green-tide-forming alga, Ulva prolifera.

Jianfang Xu, Xiao Fan, Xiaowen Zhang, Dong Xu, Shanli Mou, Shaona Cao, Zhou Zheng, Jinlai Miao, Naihao Ye

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
7.5field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 110 citations in OpenAlex.

  1. Architectural and biochemical advances in understanding microbial COThe Plant journal : for cell and molecular biology · 2026
    Review
  2. Article
  3. The contribution of biophysical and biochemical COMarine life science & technology · 2025
    Article
  4. Evidence of a putative COEnvironmental microbiology reports · 2024
    Article
  5. Article
  6. Article
  7. Article
  8. Comparative Transcriptome Profiling ofPlants (Basel, Switzerland) · 2021
    Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. National science review · 2019
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Jianfang XuKey Laboratory of Marine Bioactive substance, The First Institute of Oceanography, State Oceanic Administration, Qingdao, China.
Xiao Fan
Xiaowen Zhang
Dong Xu
Shanli Mou
Shaona Cao
Zhou Zheng
Jinlai Miao
Naihao Ye
Chinese Academy of Fishery Sciences · CNMinistry of Natural Resources · CNFirst Institute of Oceanography · CNQingdao Agricultural University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ulva prolifera, a typical green-tide-forming alga, can accumulate a large biomass in a relatively short time period, suggesting that photosynthesis in this organism, particularly its carbon fixation pathway, must be very efficient. Green algae are known to generally perform C₃ photosynthesis, but recent metabolic labeling and genome sequencing data suggest that they may also perform C₄ photosynthesis, so C₄ photosynthesis might be more wide-spread than previously anticipated. Both C₃ and C₄ photosynthesis genes were found in U. prolifera by transcriptome sequencing. We also discovered the key enzymes of C₄ metabolism based on functional analysis, such as pyruvate orthophosphate dikinase (PPDK), phosphoenolpyruvate carboxylase (PEPC), and phosphoenolpyruvate carboxykinase (PCK). To investigate whether the alga operates a C₄-like pathway, the expression of rbcL and PPDK and their enzyme activities were measured under various forms and intensities of stress (differing levels of salinity, light intensity, and temperature). The expression of rbcL and PPDK and their enzyme activities were higher under adverse circumstances. However, under conditions of desiccation, the expression of rbcL and ribulose-1, 5-biphosphate carboxylase (RuBPCase) activity was lower, whereas that of PPDK was higher. These results suggest that elevated PPDK activity may alter carbon metabolism and lead to a partial operation of C₄-type carbon metabolism in U. prolifera, probably contributing to its wide distribution and massive, repeated blooms in the Yellow Sea.

Indexed as

Base SequenceCarbonCarbon CycleGene Expression Regulation, PlantPhosphoenolpyruvate Carboxykinase (ATP)Phosphoenolpyruvate CarboxylasePhotosynthesisPyruvate, Orthophosphate DikinaseRibulose-Bisphosphate CarboxylaseStress, PhysiologicalUlvaCarbonPhosphoenolpyruvate Carboxykinase (ATP)Phosphoenolpyruvate CarboxylasePyruvate, Orthophosphate DikinaseRbcL protein, plastidRibulose-Bisphosphate Carboxylase

Identifiers

PMID22616009
PMCPMC3353924
OpenAlexW1970079778

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.