Effect of Soil Organic Matter Content and Ammonium Perrhenate(186Re) on the Growth of Chinese Cabbage and Radish

Yeon Ju Choi; Eun Young Bae; Sang Rim Kim; Faraaz Ahmed Mohammad; Jum-Soon Kang

doi:10.12791/KSBEC.2024.33.4.236

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Original Articles

Effect of Soil Organic Matter Content and Ammonium Perrhenate(¹⁸⁶Re) on the Growth of Chinese Cabbage and Radish 토양의 유기물 농도와 Ammonium Perrhenate(Re)가 배추 및 무의 생육에 미치는 영향

31 October 2024. pp. 236-248

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Abstract

This study investigates the effects of different concentrations of the radioactive nuclide rhenium (Re) and soil organic matter content on the growth, dry matter production, and chlorophyll content of Chinese cabbage (Brassica rapa subsp. pekinensis) and radish (Raphanus sativus). Ammonium perrhenate (NH₄ReO₄) was utilized as a substitute for the radioactive isotope ¹⁸⁶Re, a fission product, and was incorporated into the soil at various concentrations of 0, 5, 10, 20 mg·kg^-1 to analyze its impact. For Chinese cabbage, a significant reduction in growth parameters (number of leaves, leaf area, leaf length, leaf width, plant height, and root length) was observed as the concentration of Re increased. Notably, at concentrations of 20 mg·kg^-1 and higher, there were marked decreases in both fresh and dry weights. This trend persisted throughout the 80-day growth period, indicating that higher Re concentrations significantly inhibited the growth of Chinese cabbage. In contrast, soil organic matter content did not substantially affect the growth parameters of Chinese cabbage. Similarly, in radish, increasing Re concentrations resulted in a marked reduction in growth, with significant decreases in fresh and dry weight observed at the 80-day growth stage. Chlorophyll content analysis revealed a declining trend in both Chinese cabbage and radish as the Re concentration increased, suggesting a detrimental effect of Re on photosynthesis. These results experimentally demonstrate the effects of radionuclides on plants and are expected to provide basic information on radiation exposure.

Keywords

organic matter content

radionuclide

rhenium

seedling growth

본 연구는 방사성 핵종인 레늄(Re)의 처리 농도와 토양 유기물 함량이 배추와 무의 생육, 건물 생산, 엽록소 함량에 미치는 영향을 조사하기 위해 수행되었다. 연구에서는 핵분열 생성물인 레늄의 방사성 동위 원소인 186Re의 대체물질로 ammonium perrhenate (NH₄ReO₄)를 사용하였으며, 다양한 농도로 토양에 처리하여 그 영향을 분석하였다. 배추의 경우 레늄의 처리 농도에 따라 생육 지표인 엽수, 엽면적, 엽장, 엽폭, 초장 및 근장에서 유의미하게 감소하였으며, 특히 레늄 고농도 처리인 20 mg·kg^-1에서 배추의 생체중과 건물중이 현저하게 감소하였다. 80일 생육 단계에서도 이러한 경향은 지속되었으며, 레늄 농도가 높아질수록 배추의 생육이 현저히 억제되었다. 반면 토양 유기물 농도는 배추의 생육 지표에 큰 영향을 미치지 않았다. 무의 경우 배추와 유사하게 레늄의 처리농도가 높아지면 생육 저하가 뚜렷하게 나타났으며, 특히 80일 생육 단계에서 레늄 농도가 높아질수록 생체중과 건물중이 감소하였다. 엽록소 함량을 분석한 결과 레늄 처리 농도가 증가할수록 배추와 무의 엽록소 함량이 감소하는 경향을 보였다. 본 연구를 통해 방사성 핵종이 식물에 미치는 영향을 실험적으로 검정하고, 방사능 노출에 대한 기초적인 정보를 제공하는데 기여할 수 있을 것으로 기대된다.

키워드

레늄

묘 생장

방사성 핵종

유기물 함량

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Journal of Bio-Environment Control
Journal Title(Ko) :생물환경조절학회지
Volume : 33
No :4
Pages :236-248
Received Date : 2024-08-28
Revised Date : 2024-09-30
Accepted Date : 2024-10-04
DOI :https://doi.org/10.12791/KSBEC.2024.33.4.236

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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