| Autor: |
Small, E., Jomphe, M., Brookes, Brenda |
| Zdroj: |
Plant Systematics and Evolution; March 1991, Vol. 174 Issue: 1-2 p37-46, 10p |
| Abstrakt: |
Medicago truncatula is a member ofMedicago sect.Spirocarpos, in which all 34 species have coiled fruit, usually tightly coiled, that permanently retain the seeds. A variant ofM. truncatula from Libya is unique for the species in possessing very loosely coiled fruits, and is here recognized as a new forma,M. truncatula f.laxicyclaE. Small. In germination tests of a number of species ofMedicago, the unusual Libyan variant proved to be the only one in which rapid and simultaneous germination of most of the seeds occurred while still within a fruit. The loose coiling of the fruit of the Libyan variety appears to facilitate water entry and seedling escape. Its rapid germination might adapt it to respond quickly to intermittently available moisture, but at the cost of abandoning the strategy of intermittent germination adopted by other populations ofMedicago sect.Spirocarpos. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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