Abstract
Differential display analysis using dormant and non-dormant Arabidopsis thaliana (L.) Heynh seeds resulted in a set of genes that were associated with either dormancy or germination. Expression of the germination-associated genes AtRPL36B and AtRPL27B, encoding two ribosomal proteins, was undetectable in the dry seed, low in dormant seed, and high under conditions that allowed completion of germination. Expression of these genes was also found to be light-regulated and to correlate with germination speed. Expression of the dormancy-associated genes ATS2 and ATS4, encoding a caleosin-like protein and a protein similar to a low-temperature-induced protein respectively, was high in the dry seed and decreased during germination. Expression of ATS2 and ATS4 was high in primary and secondary dormant seed but low in after-ripened or chilled seed. The expression of both genes was also light-regulated, but no relationship with temperature-dependent germination speed was found.
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Abbreviations
- ABA:
-
Abscisic acid
- GA:
-
Gibberellic acid
- Ler:
-
Ecotype Landsberg erecta
- Cvi:
-
Ecotype Cape Verde Islands
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Acknowledgements
Cvi seeds were a kind gift from Prof. Maarten Koornneef of the Laboratory of Genetics, Wageningen University, The Netherlands. We thank Ronny Joosen, Plant Research International, The Netherlands, who was more than helpful with advice concerning molecular techniques. We gratefully acknowledge the suggestions made by an anonymous reviewer, who helped to improve the quality of this manuscript. This work was supported by the European Community (Fisheries, Agriculture, and Agro-Industrial project grant no. CT97-3711 ‘Genetic and molecular markers for seed quality’).
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Toorop, P.E., Barroco, R.M., Engler, G. et al. Differentially expressed genes associated with dormancy or germination of Arabidopsis thaliana seeds. Planta 221, 637–647 (2005). https://doi.org/10.1007/s00425-004-1477-1
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DOI: https://doi.org/10.1007/s00425-004-1477-1