Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Cited by Google
- Similars in SciELO
- Similars in Google
Share
Universitas Scientiarum
Print version ISSN 0122-7483
Abstract
BASTO, Sofia and RAMIREZ, Claudia. Effect of light quality on Tabebuia rosea (Bignoniaceae) seed germination. Univ. Sci. [online]. 2015, vol.20, n.2, pp.191-199. ISSN 0122-7483. https://doi.org/10.11144/Javeriana.SC20-2.elqt.
Tabebuia rosea germination capacity and rate have been examined under light and dark conditions. However, seeds responses to light quality, in particular to short and mid-wavelengths, are not well known. We hypothesized that short wavelengths would have a positive effect on T. rosea germination. The effects of short, mid and long-wavelengths on germination capacity, rate (germination rate index, germination rate R50, a devised index of germination rate R50- and peak value), mean daily germination and germination value were evaluated. Light quality had little effect on germination capacity; it was reduced only in darkness. Seeds under short and mid-wavelengths germinated faster (germination rate) than under any other light treatments. We concluded that although T. rosea seeds respond to all light quality treatments, the short and mid-wavelengths are the cue for increasing germination speed. For synchronizing germination, short and mid-wavelengths transmitted by red cellophane paper can be used as a pre-germinative treatment for restoration and silvicultural purposes.
Keywords : Bignoniaceae; short-wavelengths; mid-wavelengths; germination capacity; germination rate; pre-germinative treatments.