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Methods for breaking seed dormancy in one cultivated and two wild Onobrychis species

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The genus Onobrychis (Fabaceae) contain species exploited as high protein fodder plants for ruminants and due to their ability to fix nitrogen they play an important role in the enrichment of soil and increasing the nutritive value of pastures. This investigation was conducted to evaluate the effects of physical scarification, chemical scarification and freezing treatments on seed germination of O. viciifolia, along with two related wild species O. sintenisii and O. melanotricha. Seeds were collected from central regions of Iran in 2008 and tested for their reaction to dormancy breaking treatments in petri dishes. Among physical treatments, only seed pod removal significantly increased germination percentage and germination rate of O. viciifolia and O. melanotricha probably due to an inhibitory effect of seed pods. Freezing treatments had no effect on germination. In all three species acid scarification of seeds both with and without the seed pod significantly increased germination percentage and rate, although the best duration of acid scarification was highly depend on species and the presence or absence of seed pods. Results indicated that acid scarification of seeds having pods can significantly reduce mechanical restriction of seed pod and is a useful method for germination improvement in the studied species.
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Document Type: Research Article

Publication date: April 1, 2011

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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