Regenerative development in culture of Antarctic plants of Ceratodon purpureus (HEDW.) BRID.
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Regenerative development of Ceratodon purpureus (HEDW.) BRID. collected in Langhovde, East Antarctica, was studied with two month culture under controlled conditions, and the branching system was analyzed and discussed based on the native plants collected in the Antarctic, Subantarctic and two temperate sites of the Northern Hemisphere. Developmental features of secondary protonemata, rhizoids and new shoots produced from cultivated plants varied with conditions of culture medium, temperature and light. The development was generally much better in the liquid culture than in the other cultures, and the optimal temperature for the plant growth was 10℃ in the sandy soil culture and 15℃ in the liquid and agar cultures under the light condition of 800lx. The initiation and development of new shoots were possible even under extreme conditions such as 0℃ and continuous darkness. The present study has further offered other conclusions that Antarctic plants of Ceratodon purpureus have stronger potential for regeneration in stem cells than its temperate plants and that the character of less divergent, round leaves specific to Antarctic plants of this species is only phenotypic and has not been fixed genetically.
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