Scanning Electron Microscopy


A new preparative procedure using potassium permanganate has enabled previously undescribed structures on the surface and in the walls of pollen grains to be visualised. The results in some respects lend support to predictions that have been made on the ultrastructure of walls which have not been imaged clearly by any presently available technique. The findings may necessitate a reappraisal of current concepts regarding pollen wall structure.

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