Studies on Green Panic Seed : VII. Relation between time of heating at temperature of 30℃ and improvement of germination

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  • グリーンパニックの種子に関する研究 : VII.30℃での貯蔵による発芽改善
  • グリーンパニックの種子に関する研究-7-30℃での貯蔵による発芽改善
  • グリーン パニック ノ シュシ ニカンスルケンキュウ 7 30ドC デ ノ チ

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Abstract

Heating at temperature of 30℃ is thought to be one of dormancy breaking methods for green panic seed. This experiment was done to find the most effective way of the heating treatment at temperature of 30℃. Germination tests were made 4 times, 5, 9, 14 and 20 months after seed harvest, and in the tests at 9 and 20 months after seed harvest, seeds with soaking in gibberellic solution were also incubated. Experimental results were as follows ; 1) The heating treatment for a month, started one month after seed harvest, had some adverse effect to germination. 2) Of the heating treatments during 2〜9 months after seed harvest, the longer one was the more effective to germination. The treatments for a month had similar effects to germination irrespective of time of the treatment. Later application of the treatment for 2 months showed a better effect to germination than earlier one, except in the case that the gibberellin treatment was made. 3) By additional gibberellin treatment, germination increased by 20〜30% 9 months after seed harvest, and very high germination percentage (80〜90%) was shown in all treatments 20 months after seed harvest. 4) It was thought that the seed tested consisted of five groups varied in depth of dormancy. Each group reacted differently to the treatments. About 30% of the seed was easy in breaking dormancy, and not affected adversely to germination by the heating treatment during 1〜2 months after seed harvest.

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