A Protocol of Cobalt(II)-Based Chemical Treatment for Suppressing Post-harvest Gravitropic Response of Snapdragon (Antirrhinum majus L .) Flower Stalks

코발트 염을 이용한 금어초 절화의 수확 후 굴지성 반응 억제

  • Sohn, Eun-Kyu (Department of Agricultural Chemistry, College of Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Yong-Sam (Department of Agricultural Chemistry, College of Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Dong-Hern (Biochemistry Division, National Institute of Agricultural Science and Technology, Rural Development Administration) ;
  • Jung, Jin (Department of Agricultural Chemistry, College of Agriculture and Life Sciences, Seoul National University)
  • 손은규 (서울대학교 농업생명과학대학 농화학과) ;
  • 김용삼 (서울대학교 농업생명과학대학 농화학과) ;
  • 김동헌 (농촌진흥청 농업과학기술원 생물자원부 생화학과) ;
  • 정진 (서울대학교 농업생명과학대학 농화학과)
  • Published : 1999.11.30

Abstract

It was previously reported that cobalt(II) effectively suppresses the postharvest gravitropic response of snapdragon (Antirrhinum majus L.) (Kim et al. (1997) Agric. Chem. and Biotechnol. 40, 567-571). In this study, several factors affecting the suppression of the gravitropic response by cobalt ion were examined. When flower stalks of snapdragon were pretreated with several different cobalt salts, cobalt nitrate turned out to be the most effective not only in reducing the response but also in preserving the flower quality. We also tested the effects of various detergents which were added to cobalt(II) solution, finding that Tween-40 was the best among the tested with respect to the effectiveness as well as the flower quality. Based on these results, we optimized a protocol for the chemical treatment; that is, a suppressor solution containing 10 mM $CO(NO_3)_2$ and 0.05% Tween-40 was directly sprayed on the gravitropically sensitive region of cut flowers of snapdragon. The suppressor treatment gave rise to a significantly improved results when the flower stalks were stored at a lower temperature after the chemical treatment.