The inflorescence papillae of the Triticeae: a new tool for taxonomic and archaeological research
Tubb, H.J. | Hodson, M.J. | Hodson, G.C.
The diameter of silicified inflorescence papillae and the number of pits in the base of the papilla of 45 accessions from the genera Hordeum, Triticum and Aegilops, were recorded using light and scanning electron microscopy. There was a highly significant positive correlation between pit number and papilla diameter when all the accessions were considered together, but there was little correlation between these variables when each genus was considered separately. Two wild Hordeum species were compared with the cultivated H. vulgare. Whilst H. murinum was very similar to H. vulgare, H. jubatum had a significantly larger number of pits. Most, but not all, of the T. aestivum accessions investigated had greater papilla diameters than the H. vulgare accessions, and pit number was always greater in T. aestivum. Within the genus Triticum pit number and papilla diameter increase as the ploidy level increases from AA to AABB, and again from AABB to AABBDD. The implications of the results for taxonomic and archaeological research are discussed.
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