Evidence of helical thylakoid arrangement by scanning electron microscopy

LászlóA A. Mustárdy, András G.S. Jánossy

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Indirect evidence has been gained recently of the helical arrangement of single thylakoids around grana by serial transmission electron microscopic sections. However, attempts to visualise the three-dimensional structure directly remained unsuccessful, because structural details could not be resolved by scanning electron microscopy on conventionally-prepared samples. By application of the modified thiocarbohydrazide method for isolated grana samples we were able to improve the resolution on such samples below 100 Å and produce thus the first direct evidence for multiple tilted planes in a helically arranged fretwork around the surface of cylindrical grana. This structure leads towards a better understanding of the functional role of grana in photosynthetic processes.

Original languageEnglish
Pages (from-to)281-284
Number of pages4
JournalPlant Science Letters
Issue number2-3
Publication statusPublished - Oct 1979


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