Evolution of floral symmetry
| Autor: | Da Luo, Jacqueline M. Nugent, Rosemary Carpenter, Desmond Bradley, Pilar Cubas, Mark Chadwick, Enrico Coen, Lucy Copsey |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Plane symmetry
media_common.quotation_subject Antirrhinum Geometry Biology biology.organism_classification Asymmetry General Biochemistry Genetics and Molecular Biology Inflorescence Botany Molecular mechanism Floral symmetry Symmetry (geometry) General Agricultural and Biological Sciences media_common |
| Zdroj: | Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences. 350:35-38 |
| ISSN: | 1471-2970 0962-8436 |
| Popis: | Flowers can be classified into two basic types according to their symmetry: regular flowers have more than one plane of symmetry and irregular flowers have only a single plane of symmetry. The irregular condition is thought to have evolved many times independently from the regular one: most commonly through the appearance of asymmetry along the dorso-ventral axis of the flower. In most cases, the irregular condition is associated with a particular type of inflorescence architecture. To understand the molecular mechanism and evolutionary origin of irregular flowers, we have been investigating genes controlling asymmetry inAntirrhinum. Several mutations have been described inAntirrhinum, a species with irregular flowers, that reduce or eliminate asymmetry along the dorso-ventral axis. We describe the nature of these mutations and how they may be used to analyse the molecular mechanisms underlying floral evolution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|