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Annals of Botany 82: 141-145, 1998
© 1998 Annals of Botany Company

Nanoscale Similarities in the Substructure of the Exines ofFagusPollen Grains andLycopodiumSpores

JESPER WITTBORN+,, K. V. RAO, G. EL-GHAZALY and J. R. ROWLEY

Department of Condensed Matter Physics, Royal Institute of Technology, SE-100 44, Stockholm, Sweden Swedish Museum of Natural History, Palynological Laboratory, SE-104 05, Stockholm, Sweden Botany Department, Stockholm University, SE-106 91, Stockholm, Sweden

January 2, 1998 ; March 16, 1998 .

The exine substructure of an angiosperm,Fagus sylvatica(beech) pollen and a pteridophyte,Lycopodium clavatum(a club moss) spore was investigated by scanning tunnelling microscopy. These pollen and spores, despite their distinct differences in structure and morphology on a micrometre scale, have very similar substructure on a nanometre scale. The substructure appears to consist of a multi-helix, i.e. a helical chain in turn wound into a helix with a self-similarity at smaller and smaller length scales. A simple vectorial form is proposed to describe quantitatively the multi-helical substructure. Copyright 1998 Annals of Botany Company

Fagus sylvatica,beech,Lycopodium clavatum, club moss, pollen, spores, exine substructure, scanning tunnelling microscopy.


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