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Survey of Tapetal Nuclear Number as a Taxonomic Character in Leguminosae

1975; University of Chicago Press; Volume: 136; Issue: 4 Linguagem: Inglês

10.1086/336831

1940-1205

Paul A. Buss, Nels R. Lersten,

Natural product bioactivities and synthesis

The anther tapetum was surveyed in squash and paraffin preparations of 167 species from 89 genera of legumes: 25 species in 12 genera of subfamily Caesalpinioideae, 16 species in seven genera of Mimosoideae, and 126 species in 70 genera of Papilionoideae. Tapetal cells in the Mimosoideae and Papilionoideae were always uninucleate, whereas those of the Caesalpinioideae were binucleate or multinucleate, except for six herbaceous Cassia species with a uninucleate plasmodial tapetum. All mimosoid and papilionoid species, and most caesalpinioid species, have a parietal (cellular or secretory) tapetum. Based on original and previously published observations, we suggest that the parietal, binucleate, or multinucleate tapetum, characteristic of Caesalpinioideae (and most other angiosperm families), is primitive, and the uninucleate tapetum in the other two subfamilies is derived.