Study on the Boron Deficiency in Sugar Beet

사탕무우의 붕소결핍증에 관한 연구

  • Im, Hyong Bin (Dept. of Agrobiology, College of Agriculture, Seoul National University) ;
  • Ung Kyu Lim (Dept. of Agrobiology, College of Agriculture, Seoul National University) ;
  • Kyong Sik Tscho (Dept. of Agrobiology, College of Agriculture, Seoul National University)
  • Published : 1990.03.01

Abstract

The purpose of this experiment was to investigate boron deficient symptom of sugar beet. Sugar beet affected by boron deficiency was anatomized and observed by microscope and electron microscope. The sugar beet plants affected onboron deficiencyu with water culture and those of the experimental farm alike contained a small amount of boron. The symptom of boron deficiency began to show dark-brown lines at the ventral suface of the basal part of petiole and then, in the ridge of young leaf, growing point became darkened due to necrosis. The leaf blade was wrinked severely and finally the growth was stunted. The boron deficiency began with necrosis of the epidermis of the ventral surface of the basal part of petiole, and parenchyma under it. Necrosis and disintegration of the ridge of young leaf began to take place and were expanded gradually. Electron microscopic examination of boron deficient sugar beet plants revealed that chloroplasts degenerated, and appeared to contain larger amounts of starch, also observed larger number of osmophilic granules. And they peculiarly were found polyhedral crystals in the certain deficient chloroplasts.

사탕무우 품종 Mirabo를 공시하여 수경과 포양실험을 통하여 나타는 B결핍증 식물체의 해부학적 및 전현적 관찰을 하였다. B결핍증에 걸린 사탕무우에 있어서는 수경또는 포양에서 다 같이 B함량이 매우 적었다. B결핍증의 증상진행은 우선 엽병의 표면쪽 기부에 흑갈색 줄이 나타나기 시작하였으며, 그 후 유엽록과 생장점 근처가 검게 괴사하였고, 엽신이 심하게 오그라졌으며, 생장이 거의 정지되었다. 나중에는 표면쪽 엽병 기부의 표피와 그 밑의 유조직이 괴사하였다. 그리고 유엽록 조직의 괴사와 붕괴는 점차 확대되어 갔다. B결핍증을 나타낸 사탕무우의 전현적 관찰에서는 그와 같은 식물의 엽록체는 붕괴하기 시작하였으며 다량의 전분과 Osmophilic granules가 보였다. 그리고 특히 어떤 엽록체 안에는 격자를 가진 다면체의 결정체가 발견되었다.

Keywords