Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts
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| Format: | Artículo científico |
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Universidad de Costa Rica
2016
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| _version_ | 1876426724012457984 |
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| author | Arvind Bhatt |
| author_facet | Arvind Bhatt |
| contents | Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts Arvind Bhatt Sanjay Gairola Ali A. El-Keblawy Biología Desert germination seed colour Lotus glinoides Lotus halophilus Heterogeneity in seeds mostly occurs due to physiological, environmental and genetic factors, and these could affect seed dormancy and germination. Therefore, the aim of our study was to assess the effect of seed colour on germination behavior. For this, both light and temperature requirements were assessed in Lotus glinoides and Lotus halophilus (Fabaceae) from the hyper-arid deserts of the United Arab Emirates. Germination was assessed in terms of both final germination level (percentage) and germination rate, as expressed by Timson’s germination velocity index. Lotus glinoides produces black and yellow-colored seeds, and L. halophilus produces green and yellow seeds. Different seed lots were germinated in both light and darkness at different temperatures. Yellow seeds of the two species attained significantly lower germination, compared to black and green seeds. There was no specific light or temperature requirements for the germination of the two coloured seeds of L. glinoides; the effect of interactions between seed colour and both light and incubation temperature, were not significant on the final germination percentage. In L. halophilus, green seeds germinated significantly more in both light and darkness at lower temperatures (15/25 °C) and in light at higher temperatures (25/35 °C), compared to yellow seeds. Yellow seeds germinated faster, compared to black at 15/25 °C in L. glinoides and compared to green seeds at 15/25 °C and 25/35 °C in L. halophilus. Seed colour variation, at least in L. halophilus, could be a survival strategy that would determine the time of germination throughout the year in the unpredictable desert environment. Rev. Biol. Trop. 64 (2): 483-492. Epub 2016 June 01. 2016 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44945722005 https://www.redalyc.org/journal/449/44945722005/ https://www.redalyc.org/journal/449/44945722005/html/ https://www.redalyc.org/journal/449/44945722005/44945722005.epub https://www.redalyc.org/journal/449/44945722005/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.64 |
| format | Artículo científico |
| id | redalyc_44945722005 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts Arvind Bhatt Biología Desert germination seed colour Lotus glinoides Lotus halophilus Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts Arvind Bhatt Sanjay Gairola Ali A. El-Keblawy Biología Desert germination seed colour Lotus glinoides Lotus halophilus Heterogeneity in seeds mostly occurs due to physiological, environmental and genetic factors, and these could affect seed dormancy and germination. Therefore, the aim of our study was to assess the effect of seed colour on germination behavior. For this, both light and temperature requirements were assessed in Lotus glinoides and Lotus halophilus (Fabaceae) from the hyper-arid deserts of the United Arab Emirates. Germination was assessed in terms of both final germination level (percentage) and germination rate, as expressed by Timson’s germination velocity index. Lotus glinoides produces black and yellow-colored seeds, and L. halophilus produces green and yellow seeds. Different seed lots were germinated in both light and darkness at different temperatures. Yellow seeds of the two species attained significantly lower germination, compared to black and green seeds. There was no specific light or temperature requirements for the germination of the two coloured seeds of L. glinoides; the effect of interactions between seed colour and both light and incubation temperature, were not significant on the final germination percentage. In L. halophilus, green seeds germinated significantly more in both light and darkness at lower temperatures (15/25 °C) and in light at higher temperatures (25/35 °C), compared to yellow seeds. Yellow seeds germinated faster, compared to black at 15/25 °C in L. glinoides and compared to green seeds at 15/25 °C and 25/35 °C in L. halophilus. Seed colour variation, at least in L. halophilus, could be a survival strategy that would determine the time of germination throughout the year in the unpredictable desert environment. Rev. Biol. Trop. 64 (2): 483-492. Epub 2016 June 01. 2016 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44945722005 https://www.redalyc.org/journal/449/44945722005/ https://www.redalyc.org/journal/449/44945722005/html/ https://www.redalyc.org/journal/449/44945722005/44945722005.epub https://www.redalyc.org/journal/449/44945722005/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.64 |
| title | Seed colour affects light and temperature requirements during germination in two Lotus species (Fabaceae) of the Arabian subtropical deserts |
| topic | Biología Desert germination seed colour Lotus glinoides Lotus halophilus |
| url | https://www.redalyc.org/articulo.oa?id=44945722005 https://www.redalyc.org/journal/449/44945722005/ https://www.redalyc.org/journal/449/44945722005/html/ https://www.redalyc.org/journal/449/44945722005/44945722005.epub https://www.redalyc.org/journal/449/44945722005/movil |