The Effects of Cadmium on the Growth of Mulberry Tree and Metabolic Activities in the Leaves

카드뮴의 處理가 桑樹의 生長 및 生體內 代謝에 미치는 影響

The study was carried out to examine effect of cadmium spraying on mulberry leaves on the growth and metabolism of mulberry tree.The results obtained were as follow:1. Brown spot were appeared on the leaves as the symptoms of damage and the damage was remarkable with higher concentration of cadmium.2. Higher concentration of Cd inhibited the length and diameter of mulberry branches with a significant difference (P<0.05) for the length. The growth of branch length in both 5 and 7 ppm treatment of Cd was inhibited by 31% compared with the control. 3. Cadimum concentration of mulberry barks was noticeably lower than that of leaves. 4. Cadimum concentration over 3ppm inhibited significantly chlorophyll content, activitsies of respiration, glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transase (GPT) and adenocine triphosphate (APT). 5. The lowest concentration of cadmium was identified to be 3ppm to incur the inhibitory effect on the growth and metabolism of mulberry and cadmium content of mulberry leaves at the concentration was 13.86ppm.

카드뮴(Cd)의 葉面撒布가 뽕나무의 생장 및 生體內代謝에 미치는 影響을 分析 檢討하여 얻어진 結果를 要約하면 다음과 같다. 1. 뽕잎의 被害症狀은 褐色斑點으로 나타났으며, 被害는 Cd 撒布 濃度가 높을수록 加增되었다. 2. 뽕나무의 條長과 條莖은 Cd의 濃度가 높을수록 生長이 抑劑되었는데, 특히 條長은 5%의 有意性이 認定되었으며 對照에 비해 5ppm 및 7ppm구는 각각 약 31% 生長이 抑制되었다. 3. 枝條 껍질의 Cd 含量은 잎의 그것보다 월등히 낮았다. 4. 뽕잎의 葉綠素, ATP含量과 量, GOT 및 GPT의 活性은 Cd 3ppm부터 著하게 떨어지기시 작했다. 5. 뽕나무의 生長과 物質代謝에 抑制影響을 초래하는 最低 處理濃度는 Cd 3ppm이었다.