N. JitsopakulK. ThammasiriK. IshikawaMahidol UniversityThe Institute of Science and Technology for Research and Development, Mahidol UniversityJapan Horticultural Production and Research Institute2018-05-032018-05-032011-09-30Acta Horticulturae. Vol.908, (2011), 207-214056775722-s2.0-84855681214https://repository.li.mahidol.ac.th/handle/20.500.14594/11266Vanda coerulea is the most popular Vanda species of Thailand that has become endangered because of the wild orchid trade, deforestation and environmental changes. To preserve this orchid, droplet-vitrification was studied for the cryopreservation of protocorm-like bodies. Protocorm-like bodies were developed from one protocrom in ND liquid medium supplemented with 1 mg/L BA in combination with 0.5 mg/L NAA and 30 g/L maltose. Protocorm-like bodies (3.0 mm in diameter) were precultured in ND liquid medium supplemented with 0.5 M sucrose for 1 day on a shaker, then dehydrated with loading solution for 15 min and exposed to PVS2 solution for 30 min at 25°C. The plant materials were then immersed in liquid nitrogen, rewarmed rapidly and cultured on solidified ND medium. After cryopreservation, the survival frequency of cryopreserved protocorm-like bodies was 5%. The assessment of the genetic stability of cryopreserved protocorm-like bodies was developed using RAPD markers, size and sequence of the trnL (UAA) non-coding region of cpDNA. Results showed the same RAPD patterns of non-cryopreserved and cryopreserved protocorm-like bodies. The size and sequences of the trnL (UAA) non-coding region of cpDNA for noncryopreserved and cryopreserved protocorm-like bodies were not different. There was no difference in morphology and similar patterns of ploidy in plantlets developed from non-cryopreserved and cryopreserved protocorm-like bodies.Mahidol UniversityAgricultural and Biological SciencesConference PaperSCOPUS