Published Oct 10, 2014



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Sofía Basto

Claudia Ramírez

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Abstract

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.

References
How to Cite
Basto, S., & Ramírez, C. (2014). Effect of light quality on Tabebuia rosea (Bignoniaceae) seed germination. Universitas Scientiarum, 20(2), 191–199. https://doi.org/10.11144/Javeriana.SC20-2.elqt
Section
Biología Vegetal / Plant Biology / Biologia Vegetal

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