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한국식물학회 / v.26, no.4, 1983년, pp.207-216 
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은행나무의 성숙배 및 유식물에 있어서 유관속조직의 분화
( Vascular Differentiation in the Mature Embryo and the Seedling of Ginkgo biloba L. ) |
| 홍성식; 전남대학교 사범대학 생물교육학과;
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| Mature embryo and developing seedlings of Ginkgo biloba L. were embedded in a paraplast and serially sectioned at 10${mu}{ extrm}{m}$ to examine vascular differentiation and vascular transition. Procambium and protophloem formed a continuous system along the epicotylhypocotyl root axis and cotyledons in mature embryo, whereas protoxylem was differentiated discontinuously in the cotyledons and rarely in the upper hypocotyl. The traces of the first and second leaf primordia apeared almost at the same time oppositely to each otehr at the epicotyl and alternately with the cotyledon traces in the upper hypocotyl. The trace differentiated bidirectionally toward the epicotyl and root tips. the young root initially formed a diarch xylem. Then, as the traces of the first and second leaves were superimposed, the diarch xylem. Then, as the traces of the first and second leaves were superimposed, the diarch xylem of the root was changed totriarch and tetrarch xylem, respectively. On the formation of primary vascular system of Ginkgo biloba, it is suggested that the primary phloem forms a continuous system throughout the seedling, whereas the primary xylem of the epicotyl is formed independently from that of the root-hypocotyl cotyledon system. |
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| 키워드 |
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Journal of Plant Biology / v.26, no.4, 1983년, pp.207-216
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO198311920113613)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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