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Background   Stipagrostis pennata  (Trin.) De Winter is an important species for fixing sand in shifting and semi-fixed sandy lands, for grazing, and potentially as a source of lignocellulose fibres for pulp and paper industry. The seeds have low viability, which limits uses for revegetation. Somatic embryogenesis offers an alternative method for obtaining large numbers of plants from limited seed sources.    Results  A protocol for plant regeneration from somatic embryos of  S. pennata  was developed. Somatic embryogenesis was induced on Murashige & Skoog (MS) medium supplemented with 3 mg·L –1  2,4-D subsequently shoots were induced on MS medium and supplemented with 5 mg·L –1  zeatin riboside. The highest shoots induction was obtained when embryogenic callus derived from mature embryos (96%) in combination with MS filter-sterilized medium was used from Khuzestan location. The genetic stability of regenerated plants was analysed using ten simple sequence repeats (SSR) markers from  S. pennata  which showed no somaclonal variation in regenerated plants from somatic embryos of  S. pennata . The regenerated plants of  S. pennata  showed genetic stability without any somaclonal variation for the four pairs of primers that gave the expected amplicon sizes. This data seems very reliable as three of the PCR products belonged to the coding region of the genome.  Furthermore, stable expression of GUS was obtained after  Agrobacterium -mediated transformation using a super binary vector carried by a bacterial strain LBA4404.    Conclusion  To our knowledge, the current work is the first attempt to develop an in vitro protocol for somatic embryogenesis including the SSR marker analyses of regenerated plants, and  Agrobacterium -mediated transformation of  S. pennata  that can be used for its large-scale production for commercial purposes.

Protocol development for somatic embryogenesis, SSR markers and genetic modification of Stipagrostis pennata (Trin.) De Winter