Episode 4.4b · 32 min

How Plants Got Chloroplasts

How a cyanobacterium became a chloroplast, how photosynthetic partnerships spread through other cells, and how cells began forming multicellular bodies.

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Visual credits

33 sources

Visual sources include third-party material incorporated into custom animations. License information is reproduced from source records; an unrecorded license does not mean a work is public domain.

  • Elodea cells under microscope

    ~delta

    Cropped to a widescreen view; explanatory labels and chloroplast pointers added.

  • Red seaweed, South East Bay, Three Kings Islands PA111328

    Peter Southwood

    Framed for the opening montage; identifying label added.

  • Bancsó 2021 Fig 10-15 Spirogyra sp

    Sándor Bancsó

    Rotated 90° clockwise and resized for presentation; scale bar retained; explanatory labels and pointer added.

  • Gonium pectorale EPA

    Environmental Protection Agency

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Volvox (250 23) Native preparation

    Doc. RNDr. Josef Reischig, CSc.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 3

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Chlamydomonas TEM 01

    Dartmouth Electron Microscope Facility, Dartmouth College

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 6

    Silvia Ramundo et al.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 2

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 2

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Miao et al. 2024 Figure 1 — Qingshania magnifica filament morphology

    Lanyun Miao, Zongjun Yin, Andrew H. Knoll, Yuangao Qu, and Maoyan Zhu

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Miao et al. 2024 Figure 2 — Qingshania magnifica filament across scales

    Lanyun Miao, Zongjun Yin, Andrew H. Knoll, Yuangao Qu, and Maoyan Zhu

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 3

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 5

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Dictyostelium-Cells-Migrate-Similarly-on-Surfaces-of-Varying-Chemical-Composition-pone.0087981.s002

    McCann C, Rericha E, Wang C, Losert W, Parent C

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Chlamydomonas6-1

    Dartmouth Electron Microscope Facility, Dartmouth College

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Flagellar-Kinematics-and-Swimming-of-Algal-Cells-in-Viscoelastic-Fluids-srep09190-s3

    Qin B, Gopinath A, Yang J, Gollub J, Arratia P

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Motic Europe - These are Gonium Pectorale swimming together with Pandorina Morum. Bo...

    Motic Europe

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Eudorina - ボルボックスで観察する正の走光性 #volvox

    Eudorina

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Volvox daughter colony

    Depressedlymotivated

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Kirsty Wan 🔬 - Cell division in the green microalga #Volvox carteri has both plant a...

    Kirsty Wan 🔬

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 2

    Matthew D. Herron, Joshua D. Borin, Jacob C. Boswell, Jennifer Walker, I-Chen Kimberly Chen, Charles A. Knox, Michael Boyd, Frank Rosenzweig, and William C. Ratcliff

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 3

    Matthew D. Herron, Joshua D. Borin, Jacob C. Boswell, Jennifer Walker, I-Chen Kimberly Chen, Charles A. Knox, Michael Boyd, Frank Rosenzweig, and William C. Ratcliff

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 2

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 5

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Diatoms through the microscope

    Prof. Gordon T. Taylor, Stony Brook University

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Emiliania huxleyi coccolithophore (PLoS)

    Alison R. Taylor (University of North Carolina Wilmington Microscopy Facility)

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Dinophysis tripos

    Phycoplankton

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Bancsó 2021 Fig 7-12 Euglena limnophila

    Sándor Bancsó

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • ねこのしっぽラボ - 渡良瀬遊水池のプランクトン。パウリネラ (Paulinella chromatophora)だよ。殻を持つアメーバの仲間(有殻アメーバ)...

    ねこのしっぽラボ

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Paulinella chromatophora

    Luis Delaye, Cecilio Valadez-Cano, Bernardo Pérez-Zamorano

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Paulinella-chromatophora-a-b-Different-focal-planes-of-micrographs-of-P-chromatophora

    Eva C. M. Nowack

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific figure · source page 2

    Eva C. M. Nowack, Michael Melkonian, and Arthur R. Grossman

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

    Editorial use; no open license asserted.

Research references

Selected sources from the episode’s research and scientific figures.

  1. https://www.youtube.com/watch?v=n7RggKhWD8g ↗
  2. https://www.youtube.com/watch?v=C6MHQMufjq4 ↗
  3. https://www.youtube.com/watch?v=ahSUxWL2p0A ↗
  4. https://www.youtube.com/watch?v=Xy3kZ_h9l78 ↗
  5. https://www.pnas.org/doi/10.1073/pnas.1620089114 ↗
  6. https://www.pnas.org/doi/10.1073/pnas.2014294117 ↗
  7. https://cshperspectives.cshlp.org/content/6/4/a016105 ↗
  8. https://pmc.ncbi.nlm.nih.gov/articles/PMC7031061/ ↗
  9. https://pmc.ncbi.nlm.nih.gov/articles/PMC5650054/ ↗
  10. strassert 2021 molecular timescale ↗
  11. 2025 dating plastids chromatophores ↗
  12. https://www.pnas.org/doi/10.1073/pnas.1118800109 ↗
  13. https://pmc.ncbi.nlm.nih.gov/articles/PMC6384880/ ↗
  14. https://english.cas.cn/newsroom/news--archives/2024/research-news/202401/t20240124_1128931.shtml ↗
  15. https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2022.787665/full ↗
  16. https://github.com/ozanbozdag/de_novo_evolution_of_macroscopic_multicellularity ↗
  17. DOI: 10.1038/s41586-023-06052-1 ↗
  18. DOI: 10.1093/gbe/evaf090 ↗
  19. DOI: 10.1038/ncomms11370 ↗
  20. DOI: 10.1038/s41598-019-39558-8 ↗
  21. DOI: 10.1111/brv.13001 ↗
  22. miao 2024 qingshania ↗
  23. DOI: 10.1126/sciadv.adk3208 ↗
  24. miao 2024 qingshania main ↗
  25. DOI: 10.1111/nph.71116 ↗
  26. DOI: 10.1073/pnas.1118800109 ↗
  27. DOI: 10.1038/s41598-017-02668-2 ↗
  28. A New Model and Dating for the Evolution of Complex Plastids of Red Alga Origin ↗
  29. DOI: 10.1073/pnas.2014294117 ↗
  30. DOI: 10.1073/pnas.1620089114 ↗
  31. DOI: 10.1093/molbev/msaf167 ↗
  32. DOI: 10.1029/2024GL109457 ↗

Music

  • Meditation From The Star Orion
    OctahedronMusic · Envato Elements

How this film was made

Created and editorially directed by Anders Lunde using a custom production system developed over six months. AI assists research, drafting, programming, and visual production; I review and edit the material and make the final editorial decisions. Narration uses text-to-speech. Visuals combine custom-built scientific animations, AI-generated reconstructions, and credited scientific imagery.

Generated reconstructions illustrate scientific interpretations. They are distinct from photographs, specimens, and measured data.

More about the creator and production →