ISHS Acta Horticulturae 673: IX International Symposium on Flower Bulbs
EFFECT OF LOW TEMPERATURE AND CHITOSAN ON DORMANCY BREAKING AND GROWTH OF YOUNG CORMS OF THREE ARISAEMA SPECIES |
| Authors: | A. Hasegawa, R. Kanechika, S. Oguni |
| Keywords: | Arisaema, low-temperature treatment, sprouting |
| Abstract:
Dormant young corms of Arisaema sikokianum, A. ternatipartitum and A. yamatense were planted in a soil mixture of Kanuma soil, Hyuga pumice, leaf mold, Akadama soil and vermiculite in equivalent volumes with or without 1% (v/v) chitosan. The corms were exposed to 3-5°C for 0, 2 (only A. sikokianum) or 3 months, and then grown under natural temperature. The breaking of dormancy of the corms was affected greatly by low-temperature treatment. Corms of all three species remained dormant without a low-temperature treatment. In A. sikokianum two months of low-temperature treatment was inadequate, but 88 to 100% of the corms sprouted with three months of the treatment. Corms of A. ternatipartitum sprouted 92 to 100% with three months of the treatment. A. yamatense corms exposed to low temperature for 3 months sprouted 28 to 36%. Chitosan in the medium enhanced the growth of A. sikokianum and A. ternatipartitum, while the effect of chitosan was not clear in A. yamatense. | |
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