Response of ${\beta}-Glucanases{\;}to{\;}GA_3$ in Barley Aleurone Layers

보리 호분층에서 $(1-3)-{\beta}-glucanase{\;}$${\;}(1-3,1-4)-{\beta}-glucanase$${\;}GA_3$에 대한 반응

  • Song Joong, Yun (Institute for Molecular Biology and Genetics, Chonbuk National Univ.) ;
  • Ill Min, Chung (Institute of Agricultural Resources Development, Kon-Kuk Univ.)
  • Published : 1995.04.01

Abstract

Isolated barley aleurone layers were used to examine response of (1-3)- and $(1-3,1-4)-{\beta}-glucanases{\;}to{\;}GA_3$. Protein content and levels of (1-3)- and $(1-3,1-4)-{\beta}-glucanases$ increased in the presense of added $GA_3$. However, (1-3)- and $(1-3,1-4)-{\beta}-glucanases$ showed different response to $GA_3$ in their production and secretion patterns. $(1-3,1-4)-{\beta}-glucanases$ showed higher increase in enzyme activity than $(1-3)-{\beta}-glucanase$ in the early stage of$GA_3$treatment. Secretion of enzyme by $GA_3$ into the surrounding medium was more enhanced in $(1-3,1-4)-{\beta}-glucanases$ than in $(1-3)-{\beta}-glucanase$, The differential response of the enzymes might be related to the physiological role of the enzymes in germination of barley grain.

분리한 보리호분층을 이용하여 $(1-3)-{\beta}-glu-canase$$(1-3,1-4)-{\beta}-glucanase$${\;}GA_3$에 대한 반응특성을 조사하였다 $GA_3$ 처리에 의해 호분충과 배양액 내의 단백질 함량, $(1-3)-{\beta}-glucanase{\;}$${\;}(1-3,1-4)-{\beta}-glucanase$ 활성 등이 모두 증가하였다. 그러나 $GA_3$ 처리에 의한 효소활성 및 효소분비 증가 정도는 효소에 따라 큰 차이를 보였다. $(1-3,1-4)-{\beta}-glucanase$${\;}(1-3)-{\beta}-glucanase$보다 효소활성 증가 정도와 분비증가 정도 모두 컸다. 이와 같은 결과는 발아초기 $(1-3,1-4)-{\beta}-glucanase$의 중요한 생리작용과 관계가 있을 것으로 생각되었다.

Keywords