Breaking seed dormancy in Opuntia rastrera from the Chihuahuan desert

In this paper, we investigated if germination of after-ripened seeds of Opuntia rastrera Weber could be enhanced using chemical (acid) and mechanical scarification pretreatments. O. rastrera seeds need an after-ripening period to germinate (≈50%) after 1 year and no germination occurs in younger see...

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Veröffentlicht in:Journal of arid environments 2005-07, Vol.62 (1), p.15-21
Hauptverfasser: Mandujano, M.C., Montaña, C., Rojas-Aréchiga, M.
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creator Mandujano, M.C.
Montaña, C.
Rojas-Aréchiga, M.
description In this paper, we investigated if germination of after-ripened seeds of Opuntia rastrera Weber could be enhanced using chemical (acid) and mechanical scarification pretreatments. O. rastrera seeds need an after-ripening period to germinate (≈50%) after 1 year and no germination occurs in younger seeds. Germination of 3-year old seeds of O. rastrera was evaluated using sulphuric acid (H 2SO 4) for different lengths of time, and mechanical scarification treatments (dry heating at 80 °C for 12 h and washing, immersion in water for 12 h and washing, and seed coat cutting with pliers). Similar to other wild Opuntia species , germination of O. rastrera seeds was not enhanced by any scarification pretreatment, demonstrating that an after-ripening period is the best—if not the unique—way to overcome physiological dormancy for this species.
doi_str_mv 10.1016/j.jaridenv.2004.10.009
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subjects Acid scarification
acid treatment
After-ripening
deserts
Mechanical scarification
Opuntia
Opuntia rastrera
seed dormancy
Seed germination
seed scarification
sulfuric acid
xerophytes
title Breaking seed dormancy in Opuntia rastrera from the Chihuahuan desert
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