The Activities of Cytokinin-like Substances In Dormant Strawberry Plants

휴면기(休眠期) 딸기의 내생(內生) Cytokinin-like Substances의 활성(活性)에 관(關)한 연구(硏究)

  • Published : 1977.12.31

Abstract

The activity of endogenous cytokinin-like substance in dormant plants(Fragaria ananassa) was different depending on the degree of dormancy and their activity was showed the similar trend as that of growth phase. When strawberry plant crowns were extracted in methyl alcohol, and the extract was seperated by column chromatography, it showed that the activity was observed in two places by soybean callus bioassay. Activity of cytokinin-like substance was appeared when ethyl acetate/methyl alcohol (90/10v. and 50/50v.) were used. In relation to growth phase of strawberry plants, cytokinin-like activity increased at vigorous growth periods, whereas decreased in deep dormant period. However, cytokinin-like substance activity occurred again after strawberry plants passed through a certain chilling periods. Accordingly, it showed to have a negative correlation between the degree of dormancy and a mount of endogenous cytokinin-like substance.

딸기의 휴면기(休眠期)에 있어서의 내생(內生) Cytokinin-like 물질(物質)의 활성(活性)은 휴면(休眠)의 정도(程度)에 따라 변화(變化)를 보였고, 이 활성(活性)의 변화(變化)는 생육상(生育相)의 변화와 비슷한 결과(結果)를 나타냈다. 딸기의 Crown 부분(部分) 20g을 Methyl alcohol로 추출하여 Column chromatography로 분류, Soybean callus bioassay 한 결과 두 부분(部分)에서 활성(活性)을 보였고, 이 중 Ethyl acetate/methyl alcohol; 50/50 및 90/10에서 강한 활성(活性)을 보였다. 생육상과의 관계는 생육(生育)이 비교적 왕성한 시기에 강한 활성(活性)이 나타났으며, 휴면(休眠)이 깊은 시기에 활성(活性)이 낮았다. 그러나 일정(一定)한 저온기간(低溫期間)의 경과와 함께 다시 활성화(活性化)되었으며, 이 결과로 휴면(休眠)의 깊이의 정도(程度)와 내생(內生) Cytokinin의 양적증대(量的增大)와는 역비례적인 상관성을 보여주고 있다.

Keywords