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. 2019 Feb 22;10:277. doi: 10.3389/fmicb.2019.00277

FIGURE 1.

FIGURE 1

TEM documentation of absent thylakoids (A,B), parietal thylakoid arrangement (C,D), and its deviations (E–N). Thylakoids were absent in (A) Gloeobacter violaceus PCC 6501 and (B) G. violaceus CCALA 981. (C,D) Plain parietal thylakoids in Cyanobium gracile PCC 6307; (E–G) two or three peripheral fascicles of thylakoids in Leptolyngbya sp. PCC 7376; (H,I) multiple fascicles of parietal thylakoids in Synechocystis sp. PCC 6714; (J,K) parietal arrangement with a central thylakoid fascicle in Kamptonema animale CCALA 771; (L) parietal arrangement with spherical formations in Crinalium magnum SAG 34.87; (M,N) concentric thylakoids with a dense subperipheral layer in S. major PCC 6313. Scale bars = 500 nm.