Biologia plantarum 48:167-172, 2004 | DOI: 10.1023/B:BIOP.0000033440.86626.42
Effect of Radiation Spectral Composition on Nicotiana spp. Seedlings Grown in vitro
- 1 Department of Vegetable Production, Tuscia University, Viterbo, Italy
- 2 Department of Animal Biology and Genetic, University of Florence, Florence, Italy
The aim of this work was to assess the responses of seedlings of five species of Nicotiana genus to red and far red radiation. N. acuminata exhibits positive photoblastic behaviour and germination was completely inhibited under far red and darkness. In N. glauca germination was reduced under far red and darkness, but the other species showed neutral behaviour. The hypocotyl elongation was inhibited in N. glauca and N. tabacum under white and far red radiation. In N. langsdorffii and N. debneyi hypocotyl was elongated under far red radiation. Only in N. acuminata red radiation promote greater hypocotyl elongation than dark condition. On the phylogenetic tree obtained from restriction analysis N. glauca and N. acuminata are grouped in one branch, while the other species, N. langsdorffii, N. debneyi and N. tabacum, are grouped in the other branch cluster. Moreover, the N. debneyi behaviours under different radiation treatments were similar to those of N. tabacum. These two species are allopolyploid members of the genus Nicotiana, as also was confirmed by this study.
Keywords: germination; PCR-RFLP; phytochrome; plant development; tobacco
Subjects: chlorophyll, spectral composition of radiation; dendrogram, phylogenetic tree; germination; growth analysis, plant development, biomass and yield enhancement; monochromatic radiation; Nicotiana acuminata; Nicotiana debneyi; Nicotiana glauca; Nicotiana langsdorffii; Nicotiana tabacum; phylogenetic tree, dendrogram; phytochrome; protochlorophyll, spectral composition of radiation, germination; radiation, visible, spectral composition; tobacco, spectral composition of radiation
Published: June 1, 2004 Show citation
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