Does Late-acting Self-incompatibility (LSI) Show Family Clustering? Two More Species of Bignoniaceae with LSI:Dolichandra cynanchoides and Tabebuia nodosa |
| |
Authors: | GIBBS PETER E; BIANCHI MARTA B |
| |
Institution: | Institute of Environmental and Evolutionary Biology, The University, St Andrews, KY16 9AL, Scotland, UK Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina |
| |
Abstract: | By means of hand pollination experiments and fluorescence microscopythe breeding systems and pollen tube growth were studied inDolichandra cynanchoides and Tabebuia nodosa, two bignoniaceousspecies of the Chaco woodland of NE Argentina. Both speciesabscised all selfed pistils within 48 d although selfpollen tubes grew successfully to the ovary and penetrated manyovules. Both species therefore show late-acting self-incompatibility(LSI) or ovarian sterility (OS) type control ofselfing. LSI-OS has been reported in 17 species of the Bignoniaceae,and is also clustered in families such as the Bombacaceae-Sterculiaceae,Fabaceae and Myrtaceae. The implications of such family clusteringare discussed, with regard to current hypotheses for the actionof LSI-OS phenomena. Copyright 1999 Annals of Botany Company Bignoniaceae, Dolichandra cynanchoides, Tabebuia nodosa, Chaco, late-acting self-incompatibility, ovarian sterility. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|