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| ▒ Home | > | | 연구정보 (Information) | > | 국내연구정보 (Domestic information) |
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| Diagnosis of Seed Quality by Soft X-Ray Photographs |
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| 글쓴이 : 관리자
날짜 : 08-12-22 20:36
조회 : 10642
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Diagnosis of Seed Quality of Korean White Pine by Soft X-Ray Photographs <Jour. Kor. For. Soc. 23:1-8 1974> Kyung-Hyun Min
To test the seed quality of Korean white pine (Pinus koraiensis), seed pre-germination and embryo-growing process were investigated and the abnormal embryos were discriminated through soft X-ray photograph. The study results were as follows:
1) The embryo reflection was clearly observed for air dried seeds (moisture content: 6.3%) at 30 seconds, stratified seeds at 60 seconds (moisture content: 24.0-36.0%) and immature seeds (moisture content: 41.0-64.0%) at 90 seconds, then the photographing variation for soft X-ray was the radiographing distance at 42cm, focus M, voltage 19.5 K.V.P. and Ampere 8 mA. Based on the results above, the radiographing time for discriminating the embryo reflection was increased by the increase of moisture content in the seeds. 2) The embryo reflection could be clearly observed from the last ten days of June and the embryo length ratio to endosperm length was growing to 65% at the first ten days in September. By the results obtained by the soft X-ray photograph was thought to be effective method for the study of inner morphology of seeds. 3) The seeds reflecting clearly embryo and endosperm were observed up to 69.7% and the seeds practically germinated up to 75.2%. The difference in number between the seeds discriminated by the soft X-ray photograph and the seeds practically germinated was only 6%. According to these results, the soft X-ray photograph was thought to be a effective method for the germination diagnosis in the shortest time and with exactness comparatively. 4) Because of the possibility of clearness for observation of pre-germination process, the soft X-ray photograph could be used for the study on the physiology of seed germination. 5) The frequency of abnormal embryos was 4.4% and their types could be classified into twenty groups. Among these groups, single abnormal embryo type was divided into eight subtypes and 2.0 percent; twin embryo was six subtypes and 1.8 percent; triple embryo was five subtypes and 0.5 percent; and inverse type was 0.12 percent.
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