Data/hora: 09/06/2024 06:18:17

Provedor de dados: | 16
País: | Netherlands
Título: | Comparative pollen morphology and ultrastructure of Mentheae subtribe Nepetinae (Lamiaceae)
Autores: | Moon, H.-K.; Vinckier, S.; Smets, E.F.; Huysmans, S.
Data: | 2008
Ano: | 2008
Palavras-chave: | Nepetoidea orbicules palynology Nepetinae sexine ornamentation ultrastructure 42.41; 42.48; 42.58.
Resumo: | This study provides new pollen data of 52 representative species belonging to all 12 genera in the currently classification of the subtribe Nepetinae, and considers the possible presence of orbicules for the first time. Pollenmorphology and ultrastructure were investigated with light, scanning electron and transmission electron microscopy. Nepetinaepollen is small to large (P = 16–65 µm, E = 17–53 µm), oblate to prolate (P/E = 0.7–1.6) in shape and mostly hexacolpate (sometimes octocolpate). The exine stratification in all taxa studied is similar and characterized by unbranched columellae and a continuous, granular endexine. Sexine ornamentation in the Nepetinae is bireticulate, microreticulate or perforate. In perforate and microreticulate pattern a tendency towards a bireticulum could be recognized due to trace of secondary tectal connections. The bireticulate pattern is most common with variations of primary muri and secondary reticulum. In Hymenocrater and Schizonepeta the observed variation of sexine ornamentation is particularly valuable at the generic level. Pollen data support Lophanthus and Nepeta as very closely allied and Lallemantia is clearly distinct from Dracocephalum. The formerly suggested infrageneric relationships within Dracocephalum and Nepeta are only partly corroborated by palynological characters. Orbicules are absent in the Nepetinae.
Tipo: | Article / Letter to the editor

Identificador:

http://www.repository.naturalis.nl/record/449553

http://dare.uva.nl/cgi/arno/show.cgi?fid=490220

Formato: | application/pdf
Fonte: | Various articles (0034-6667) vol.149 (2008) nr.3/4 p.174
Fonte: | (c) Naturalis