2. 29 28
Stramenopiles 32 33 31 30

3. Heterokont Flagellae

4. Stramenopile Phylogeny
Fig in Graham et al. 2008
Aureochrome (Blue-Light Receptor)

5. Diatoms 1 2 3

6. Marine, Freshwater

7. Pelagic
Benthic 8 7

8. Plankton
Periphyton 24

9. Epiphytic 9
Epizoic
Endozoic
Endophytic
Epilithic 11
(Foraminfera)

10. Ocean Sediments 14

11. Primary Productivity: 20% of Global Carbon Fixation13

12. Diatomaceous Earth 26 27

13. Amnesiac Shellfish Poisoning
(Domoic Acid) 15
Pseudo-nitzschia

14. Frustule

15. Silica (SiO2, Silicon Dioxide)18 19
Abundant in Water
Inert to Enzymatic Attack
pH buffer; maintains Carbonic Anhydrase Activity

16. Frustule Components

17. Valves, Connecting Bands
Girdle = Cingulum
Fig in Graham and Wilcox 2007

18. Girdle View
Valve View 20 22

19. Areolae
Fig in Graham and Wilcox 2007

20. Loculate and Poroid Areolae
(and Velum)
Fig in Graham and Wilcox 2007

21. STRIAE
Fig in Graham and Wilcox 2000

22. Ocellus: Mucilage Secretion
Figs , in Graham and Wilcox 2007

23. Tubes: Labiate Processes
Fig in Graham and Wilcox 2000

24. Tubes: Strutted Processes
Figs , in Graham and Wilcox 2007

25. Forms of Extracellular Mucilage
Fig in Lee 1999

26. Raphe, Central Nodule, Polar Nodules
Fig in Lee 1998
Fig in Lee 1999
Fig in Graham and Wilcox 2000

27. Raphe System Valve View Girdle View
Figs , in Graham and Wilcox 2000
Girdle View

28. Diatom Structural Diversity
ARAPHIC PENNATE
CENTRIC
RAPHIC PENNATE

29. Diatom Phylgoeny
Fig in Graham et al. 2008

30. MOTILITY Shuffling (Mucilage)
Coordinated Movement (Raphe, Polysaccharide Rods,
Mictotubules, Kinesin, Dynein) 39 40

31. NUTRITION 20

32. Regulation of Mixotrophy
Fig in Graham et al. 2008

33. Obligate Heterotroph
Leucoplast 38 36
Nitzschia alba

34. Chlorophyll a
Fig in Graham et al. 2008 27

35. Chloroplast Origin 34

36. Cell Division Silica Deposition Vesicle
(Ploidy Level)
Silica Deposition Vesicle
Fig in Graham et al. 2008
Fig in Graham et al. 2008

37. Multicellular or Colonial?41 40 44
Asteroniella
Melosira
Chaetoceros 45 43
Licmophora
Tabellaria
Skeletonema 42

38. Cell Division: McDonald Pfitzer Rule
Fig in Graham et al. 2008

39. (Meiosis, Oogamy, Egg, Sperm, Flagella, Auxospore)
Centric Sex
(Meiosis, Oogamy, Egg, Sperm, Flagella, Auxospore)
Fig in Graham et al. 2008

40. (Meiosis, Isogamy, Active Gamete, Passive Gamete, Auxospore)
Pennate Sex
(Meiosis, Isogamy, Active Gamete, Passive Gamete, Auxospore)
Fig in Graham et al. 2008

41. Initiation of Sex
Achievement of Minimal Size
Environmental Cues

42. Sexual Behavior Synchronous (Favorable)
Synchronous (Unfavorable Conditions)
3) Asynchronous (Favorable)
4) Asynchronous (Unfavorable)

43. (Resting Cell, Rejuvenated Cells)
Dormancy
(Resting Cell, Rejuvenated Cells)
Fig in Graham et al. 2008

44. Licmophora

45. 1 http://www.daviddarling.info/images/diatoms.jpg2 3 4 5 6
laketurnover.gif 7
20trap.JPG 8

46. 9 http://home.hiroshima-u.ac.jp/fishlab/Dhaku/epizoic%20diatom/Falcula
%20hyalina/1st%20ante%20em.jpg 11 12 13 14 15
Pseudo_nitzschia_seriata.jpg 16 17 18

47. 20 http://www.astrographics.com/GalleryPrints/Display/GP2131.jpg19
SuperStock_ jpg 20 21 22 23 24 25 26
diatomaceous_earth.jpg 27 28 29

48. 31 http://www.marlin.ac.uk/imgs/Species/Chromophycota/ o_lamhyp.jpg32 33 34 35 36
Nitzschia_jason3_hcp1_402.jpg 37 38
$ jpg 39 40
2006/08/hh_060822%20newsite-1%20melosira_vg%20056-txt-s.JPG

49. 43 http://www.glerl.noaa.gov/seagrant/GLWL/Algae/Diatoms/Images/ 41 43
MTUTabellaria_fenestrata.jpg 44
diatoms/chaetoceros_concavicornis_300.jpg 45
_large.jpg