SYSTEMATIC EMBRYOLOGY OF THE ARACEAE

被引:38
作者
GRAYUM, MH
机构
[1] Missouri Botanical Garden, St. Louis, 63166-0299, Missouri
关键词
ENDOTHECIAL WALL THICKENINGS; FLOWERING PLANTS; EVOLUTION; PHYLOGENY; PATTERNS; TAPETUM; POLLEN;
D O I
10.1007/BF02858562
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Embryological data of systematic significance to the family Araceae are reviewed and analyzed, with special attention given to the determination of character-state polarities. Character-states considered primitive within the family include: presence of endothecial thickenings; binucleate, starchless pollen; anatropous, crassinucellate ovules with a thick nucellar cap and a single, unbranched funicular bundle; solanad or caryophyllad embryogeny; helobial endosperm development, with 2-8 cells in the chalazal chamber and ab initio cellular division in the micropylar chamber; and endosperm present in ripe seeds. The phylogenetic implications of these conclusions are discussed, and promising avenues for future research are indicated.
引用
收藏
页码:167 / 203
页数:37
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