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Free Content Cryopreservation of Pistacia Spp. Seeds by Dehydration and One-step Freezing

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Cryopreservation protocols by dehydration and one-step freezing were developed for seeds from three Pistacia species, i.e., P. vera, P. terebinthus and P. lentiscus, which were characterised by different initial germination percentages (100%, 17% and 81%, respectively). In P. vera, a maximum of 90% germination was obtained following 8 hours drying in silica gel (corresponding to 11.7% moisture content on a FW basis) and direct immersion in LN. In P. terebinthus and P. lentiscus, shorter periods of dehydration (1 hour and 15 min, respectively) were sufficient to reduce their moisture content to about 20%, which resulted in peak seed germination percentages from cryostorage of 16% and 47%, respectively. Following cryopreservation, the seeds germinated better on semi-solid MS medium, than on cotton wool wetted with dH2O or liquid MS medium. Finally, in P. vera and P. lentiscus, high and significant correlation coefficients were obtained between the TTC viability test and seed germinability after recovery from LN, provided that seeds which were considered positive in the test showed completely or partially red embryonic axes coupled to completely red cotyledons.

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Document Type: Research Article

Publication date: March 1, 2007

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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