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Germination and cryopreservation of several cactus species from NE Brazil

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Seed germination of Cereus jamacaru, Discocactus zenthneri, Microchanthus flaviflorus and Pilosocereus gounelli was studied under different temperature and light regimes. Discocactus zenthneri seeds germinated at very low percentages (<5%) in all conditions studied; the positive results of the tetrazolium test suggested a very deep dormancy. The other three species had high germination percentages when incubated at 20-30°C, and also at alternating temperatures of 25/15°C, under photoperiod conditions (maximum percentages obtained 96-100%). Incubation in darkness prevented germination (percentages 0-1%). However, when seeds were subsequently transferred to photoperiod incubation, germination was promoted (90-99%). Seed cryopreservation did not affect the germination of the species studied (Cereus jamacaru, Discocactus zenthneri, Melocactus albicephalus, M. concinnus, M. paucispinus, Micranthocereus flaviflorus and Pilosocereus gounelli).
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Document Type: Research Article

Publication date: April 1, 2010

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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