Dormancy breaking in seeds of species of the Nicotiana genus
In the germplasm bank of the Tobacco Research Institute of Cuba the germinative power was determined in 11 species belonging to the genus Nicotiana. All the evaluated species presented high dormancy degree which obtained less than 40% of germination. For the species Nicotianamegalosiphon Heurc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Spanish |
| Published: |
Universidad Central "Marta Abreu" de Las Villas
2014-01-01
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| Series: | Centro Agrícola |
| Subjects: | |
| Online Access: | http://cagricola.uclv.edu.cu/index.php/es/volumen-41-2014/numero-1-2014/83-ruptura-de-dormancia-en-semillas-de-especies-del-genero-nicotiana |
| Summary: | In the germplasm bank of the Tobacco Research Institute of Cuba the germinative power was
determined in 11 species belonging to the genus
Nicotiana. All the evaluated species presented high dormancy
degree which obtained less than 40% of germination. For the species Nicotianamegalosiphon
Heurck and Mueller the effect of potassium nitrate (3.0 g/L), giberelic acid (0.15 g/L), stratification to 5 0C (49 days),
Fitomás (1%), sulfuric acid (0.5 min) and criopreservation (49 days) on the germination of seeds was investigated.
Starting from the results that they showed higher germination percentages, the influence of the combination of
different levels of giberelic acid (0.00; 0.05; 010; 0.15; 0.20 and 0.25 g/L) with stratification to 5 0C (0; 7; 21; 35
and 49 days) and criopreservation (0; 7; 21; 35 and 49 days) on the germination of the seed was studied. The
highest percentage in germination was observed after the exposition to 49 days to 5 0C followed by a period of
24 h in 0.20 g/L giberelic acid. When exposing the seeds from the 10 remaining species to the established
procedure for the N. megalosiphon
significantly superior germination percentages they were reached (of 49%to 84%) to those obtained through the traditional germination rehearsals. |
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| ISSN: | 0253-5785 2072-2001 |