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Non-deep simple morphophysiological dormancy in seeds of the rare Alpinia galanga: a first report for Zingiberaceae

Published online by Cambridge University Press:  03 March 2016

R.G. Baradwaj ,
M.V. Rao ,
Carol C. Baskin  and
T. Senthil Kumar
R.G. Baradwaj
Affiliation:
Department of Plant Science, Bharathidasan University, Tiruchirappalli, TN 620024, India
M.V. Rao*
Affiliation:
Department of Plant Science, Bharathidasan University, Tiruchirappalli, TN 620024, India
Carol C. Baskin
Affiliation:
Department of Biology, University of Kentucky, Lexington, KY 40506, USA Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
T. Senthil Kumar
Affiliation:
Department of Industry University Collaboration, Bharathidasan University, Tiruchirappalli, TN 620024, India
*
*Correspondence Email: [email protected]
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Abstract

Little information is available on seed dormancy of members of the Zingiberales and especially the Zingiberaceae. Our aim was to investigate the dormancy breaking and germination requirements of Alpinia galanga in vitro with a minimum number of seeds, using the move-along experiment. The mass of imbibed seeds increased by 17.5% in 1 d, showing that seeds were water permeable. The best germination in the move-along experiment (86.7%) was obtained when seeds were exposed to the sequence of temperature regimes that began with winter (20/10°C), and seeds began to germinate after 6 weeks at this temperature regime. Seeds dry stored for 4 months and then incubated at the sequence of temperature regimes that began with summer (30/20°C) started germinating in the sixth week at this temperature regime and had germinated to 93.3% after 18 weeks. Seeds kept dry for 4 months and then treated with 50 mg l−1 gibberellic acid (GA3) began to germinate at 30/20°C after 2 weeks. Control seeds incubated continuously at 20/10, 25/15 or 30/20°C germinated to 80.6, 77.8 and 60.0%, respectively. When incubated at 15, 20, 25 or 30°C, the ideal temperature for embryo growth was 20°C. Since GA3 and dry storage can break non-deep physiological dormancy and embryos grew during warm stratification, seeds of A. galanga have non-deep simple morphophysiological dormancy (MPD). This is the first report of non-deep simple MPD in the Zingiberaceae.

Keywords

morphophysiological dormancymove-along experimentunderdeveloped embryoZingiberaceae
Type
Short Communication
Information
Seed Science Research , Volume 26 , Issue 2 , June 2016 , pp. 165 - 170
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Copyright
Copyright © Cambridge University Press 2016 

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