期刊
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
卷 175, 期 2, 页码 169-190出版社
OXFORD UNIV PRESS
DOI: 10.1111/boj.12163
关键词
exine; Gomphandra; irregular pollen; phylogeny; pollen morphology; scanning electron microscopy
资金
- US National Science Foundation International Research Fellowship [0965022]
- Office Of The Director
- Office Of Internatl Science &Engineering [0965022] Funding Source: National Science Foundation
Aquifoliales, as currently circumscribed, comprise five families and 20 genera, most of which have not been compared with regard to their pollen. Generic relationships within the order have not been fully resolved with molecular data, but pollen can provide a potential source of characters for future phylogenetic studies. To assess diversity in the order, pollen from 19 genera was examined with light and scanning electron microscopy. Pollen is typically tricolpate to triporate, although grains with one to nine pores were observed. Grains are small to medium, with a polar axis of 6-44m and an equatorial axis of 10-47m. Irregular pollen was recorded from nine genera. Exine patterning is diverse at the generic level and includes psilate, microechinate, striate to reticulate and clavate types, and is quite complex in some genera. All but four genera of Aquifoliales can be readily distinguished by their pollen, if heavy deposits of pollenkitt (present in 11 genera) are removed during and after acetolysis. Pollen from multiple taxa of Gomphandra, the second most diverse genus in the order, was surveyed to investigate species boundaries. Specimens of Gomphandra from continental Asia exhibited seven different pollen morphologies, suggesting that exine patterns may be useful for the recognition of species in that region.(c) 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 175, 169-190.
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