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Cryopreservation of Lilium Martagon L. Meristems by Droplet-Vitrification and Evaluation of Their Physiological Stability

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BACKGROUND: The aim of the present study was to compare different strategies for cryopreservation of martagon lily meristems and to evaluate the physiological status of the regenerants. MATERIALS AND METHODS: The bulblets were stored at 5°C or 20°C and pretreated with 3% or 6% sucrose prior to droplet-vitrification. The meristems were then assessed for their survival and regeneration. Their photochemical activity was investigated using a Photosynthesis Yield Analyzer MINI PAM 2000 Portable Chlorophyll Fluorometer and their photosynthesis oxygen production was evaluated with a Plant Vital 5030 device. RESULTS: The plant material stored at 5°C on medium containing 3% sucrose exhibited lower survival (40.8%) and regeneration (75%) of meristems following cryopreservation compared with material stored at 20°C on medium containing 3% sucrose, for which survival was 65% and regeneration 87%. Treatment of lily meristems for 30 min with PVS2 yielded high survival and regeneration. The implemented cryopreservation protocol did not induce any physiological changes in regenerants. Chlorophyll fluorescence (Fv/Fm) was 0.822 for cryopreserved samples (+LN) and 0.824 for non-cryopreserved ones (-LN). Photosynthetic oxygen production (KphA) was 1.531 (+LN) and 1.410 (-LN). CONCLUSION: Droplet-vitrification seems to be an effective method for cryopreservation of martagon lily meristems with the aim of its ex situ protection.
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Document Type: Research Article

Publication date: 01 March 2017

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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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