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The Potential of Cryotherapy to Remove Sugarcane Mosaic Virus from Sugarcane (Saccharum spp. Hybrids) Shoot Tips

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BACKGROUND: Virus-free sugarcane is difficult to achieve due to the multiple vegetative propagation cycles employed commercially. In vitro culture using small (1 mm) meristematic shoot tips has eliminated viruses but survival is low with small explants. OBJECTIVE: DropletVitrification (D-V) and V-Cryoplate protocols were investigated for the elimination of Sugarcane mosaic virus (SCMV) from large (c. 3 mm) in vitro-derived shoot tips. MATERIALS AND METHODS: Shoot tips excised from NCo376 and N19 cultivars were exposed to both cryogenic procedures. Virus indexing by RT-qPCR was performed 16 weeks after recovery. RESULTS: Explants exposed to cryo-treatments that recovered and multiplied was 30-92%, while at least 90% of control explants regenerated. No virus was detected in multiplied shoots from either cultivar after D-V and liquid nitrogen immersion. In NCo376, virus was eliminated after D-V without cooling. CONCLUSION: The preliminary findings suggest that cryotherapy and/or osmotherapy are viable options for SCMV removal from infected plants.
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Document Type: Research Article

Publication date: September 1, 2020

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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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