MONOCOTYLAR SEEDLINGS - REVIEW OF EVIDENCE SUPPORTING AN ORIGIN BY FUSION

被引:19
作者
HAINES, RW [1 ]
LYE, KA [1 ]
机构
[1] AGR UNIV NORWAY, DEPT BOT, N-1432 As, NORWAY
关键词
cotyledons; Dicotyledones; Monocotyledones;
D O I
10.1111/j.1095-8339.1979.tb02190.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The structure and growth of the seedling, as described in the literature, is discussed for both monocotylar Dicotyledones and for Monocotyledones (several Apiaceae, Ranunculaceae and Gesneriaceae; species of Combretum, Peperomia, Cyclamen, Corydalis and Pinguicula, and also anomalous syncotylar examples of Impatiens, Butomus, Agave, Cordyline, Dioscorea, Pitcairnia and Costus). In all examples the single cotyledon appears to be derived, phylogenetically, from an ancestral pair which has fused, often with no remaining trace of their double origin, to give an apparatus which buries the unexpanded plumule and radicle deeply in the ground early in germination. No evidence for suppression of one of the ancestral pair of cotyledons was found in any species. The syncotylar theory of the origin of monocotyledons of Sargant (1903) is supported and extended to apply to all known monocotylar species. The anomalous appearance of paired cotyledons in Agapanthus and Cyrtanthus apparently results from twinning, as known in Sinapis and Centranthus, not to atavistic reformation. Copyright © 1979, Wiley Blackwell. All rights reserved
引用
收藏
页码:123 / 140
页数:18
相关论文
共 95 条
[1]  
AGARDH CA, 1829, LAROBOK BOTANIK
[2]  
ALLEN G, 1882, COLOURS FLOWERS ILLU
[4]  
ARBER A, 1920, WATER PLANTS
[5]  
Arber A, 1925, MONOCOTYLEDONS MORPH
[6]  
Bancroft N, 1914, NEW PHYTOL, V13, P285
[7]  
BECCARI O, 1870, NUOVO GIORNALE BOTAN, V2, P149
[8]  
Bernhardi JJ., 1832, LINNAEA, V7, P561
[10]   Observations on the anatomy of teratological seedlings II On the anatomy of some polycotylous seedlings of Centranthus ruber [J].
Bexon, D .
ANNALS OF BOTANY, 1920, 34 (133) :81-94