Germination of Denmoza rhodacantha (Salm-Dyck) Britton & Rose (Cactaceae)
The germination response of Denmoza rhodacantha (Salm-Dyck) Britton & Rose to seed scarification and different calcium concentrations was analysed. Both scarified and unscarified seeds were treated with two different calcium concentrations (1.74 or 6.36 meq l-1 calcium sulfate in distilled water...
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2007 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/92922 |
| Online Access: | http://hdl.handle.net/11336/92922 |
| Access Level: | Open access |
| Keyword: | ARGENTINA CACTUS SEEDS CALCIUM SOLUTION CARDONAL SCARIFICATION https://purl.org/becyt/ford/4.5 https://purl.org/becyt/ford/4 |
| Summary: | The germination response of Denmoza rhodacantha (Salm-Dyck) Britton & Rose to seed scarification and different calcium concentrations was analysed. Both scarified and unscarified seeds were treated with two different calcium concentrations (1.74 or 6.36 meq l-1 calcium sulfate in distilled water). All treatments were conducted under a constant temperature (30 °C), and a photoperiodic regime of 12 h light and 12 h dark. Germination was initiated significantly sooner (3.6 days), and the rate of final germination was significantly higher (90.8%), for scarified seeds treated with a solution of 6.36 meq l-1 Ca compared with all other treatments (9.0-11.4 days and 3.6-6.8%, respectively). There were no significant differences among the treatments for the time in which 50% of final germination occurred (6.9-13.6 days). The results suggest that both factors, scarification and calcium concentration, favor germination of Denmoza seeds. |
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