한국잠사곤충학회지 (Journal of Sericultural and Entomological Science)
- 제23권1호
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- Pages.1-31
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- 1981
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- 2234-8174(pISSN)
뽕나무 古條揷木의 發根에 關한 組織 및 生化學的 硏究
Histological and Biochemical Studies on the Rooting of Hard-wood Cuttings in Mulberry (Morus species)
- 임수호 (農村振興廳 蠶業試驗場)
- Lim, Su-Ho (Sericultural Experiment Station, Office of Rural Development)
- 발행 : 1981.01.01
초록
뽕나무의 古條揷木에 있어서 不定根의 發根力과 가장 密接한 關係가 있다고 생각되는 要因으로서 揷穗의 組織學的인 差異와 生理作用에 重要한 役割을 하는 生長調節物質을 生物的으로 檢定하고, 그 物質의 作用과 糖類, C/N率, 核酸, 아미노酸等 含有物質이 뽕나무의 發根力과 어떤 關係가 있는지를 究明하기 爲한 試驗을 實施하여 다음과 같은 結果를 얻었다. 1. 뽕나무는 系統과 品種에 따라 그 發根力에 큰 差가 있었다. 發根력力이 가장 强한 系統은 M. Lhou(51.00%
Rootability of the hardwood cuttings of mulberry was related not only histological characteristics but dependent on biochemical properties. In this connection, the characteristics of the hardwood cuttings were histologically observed and the growth substances produced by the cuttings were also identified by means of mung bean bioassay. Amino acid, carbohydrate, nucleic acid contents, and the C/N ratio were also analysed. The results are summarized as follows. 1. There were differences in rootability of cuttings between mulberry species and varieties Among the three mulberry species tested, Morus Lhou Koidz. showed the highest rootability while M. bombycis showed the lowest one. In varietal differences in rootability, it was shown that the varieties could be grouped according to rootability: high varieties(above 80%), medium(41~79%), and low(below 40%). The higher varieties were Kemmochi, Nakamaki, Kosen, and Wusuba roso. 2. The histological characteristic of the hardwood cuttings most closely related to rootability was cell layer arrangement in the sclerenchyma tissue. The lower rootability varieties developed two or three overlapping cell layers in the bark tissue and in the higher rootability varieties they were scattered over the primary cortex. 3. In the higher rootability varieties, there was a positive correlation between the development of root primodia and rootability of the hardwood cuttings. It was also shown that there was a close relationship between the size of primodia and the surface area of the lenticel with rootability of the cuttings. 4. Effect of growth substances extracted from the hardwood cuttings were determined by mung bean bioassay. The higher rootability varieties usually showed higher activities of the growth substances, in contrast the lower rootability varieties showed higher activities of the inhibitory substances. 5. It was evident that the substance separated by paper chromatography was identified as indole acetic acid with
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