• Journal of Plant Biology
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• 제34권3호
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• pp.191-199
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• 1991

This study has been conducted to investigate the developmental changes of cambial initials and their derivatives in relation to the growing girth of tree in Diosypros kaki and Firmiana simplex. In D. Kaki and F. simplex with typical storeyed cambium, increase in the girth of camium occurred by radial anticlinal division in general, however occasionally the increase was companied by pseudotransverse division. The length of fusiform initials, vessel member, and sieve tube member remained relatively constant throughout the secondary growth but that of fiber showed general tendancy to increase with growing girth of tree. During the girth increase of tree, height and number of ray remained constant in D. kaki, however in F. simplex, height of ray markedly decreased while the number of ray per unit area more or less increased. The secondary ray was originated from the segmentation or division of the side or end of fusiform initials.

• Journal of Plant Biology
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• 제36권3호
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• pp.251-257
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• 1993

The size variation of the cambial initials and their derivatives, in relation to the increase of girth, in the intact and decapitated stem of Populus euramericana was anatomically studied. In the typical nonstoried cambium of P. euramericana, the cell size of fusiform initials, vessel member, and sieve tube member were gradually increased and thus it reached a maximal state. In the intact plants, the size of the cambial initials and their derivatives was larger then in the decapitated ones. On the other hand, the frequency of anticlinal division of the cambial cells, the rate of the elongation and loss of the daughter initials in the intact plants was higher than in the decapitated ones. The cambium of the intact plants had higher ray compared with that of the decapitated ones. It was interpreted that these results were caused by the decapitation, which could block the supply of certain substances for cell growth such as hormones and metabolites.

• Journal of the Korean Wood Science and Technology
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• 제34권3호
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• pp.1-7
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• 2006

국내에서 재배된 케나프의 해부 물리적 특성을 광학현미경, 주사전자현미경 및 X선회절법으로 조사하였다. 그 결과 케나프는 사부에 인피섬유, 사부 방사조직, 피층 유세포, 사관요소 등이 존재하였고, 목부는 도관요소, 목섬유, 방사조직 등으로 구성되어 있었다. 관공은 고립 및 2~3개가 방사방향으로 복합한 것이 많이 존재하였고, 방사조직은 평복, 방형, 직립세포가 모두 분포하고 있었다. 수피부의 인피섬유 길이는 생장기간이 길어짐에 따라 점차 증가하였고, 목부 섬유의 길이는 평균 0.74~0.82 mm로써 생장기간과 줄기의 높이에 관계없이 거의 차이가 없었다. 상대결정화도는 사부가 53~74%, 목부가 43~58%인 것으로 나타났으며, 셀룰로오스의 결정폭은 사부가 2.68~3.24 nm, 목부가 2.46~2.95 nm 정도인 것으로 나타났다. 케나프 줄기의 높이가 증가함에 따라 생재함수율과 생재밀도는 증가하였으나, 기본밀도는 낮게 나타났다.