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KMID : 1041219980400020091
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Journal of Sericultural and Entomological Science
1998 Volume.40 No. 2 p.91 ~ p.96
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Ultrastructural Changes in the Cortical Cell Mulberry Trees(Morus)during Wintering Period
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Abstract
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In relation to cold acclimation, this experiment was carried out to understand the changes of the cortical cells in the living barks of the mulberry during wintering period. The living bnrks of three mulberry varieties (Kaeryangppong, Shinilppong and Yongcheonppong) were sampled from December, 1995 to March, 1996. The result of this experiment was summarized as follows. The cortical cells in the living barks of the mulberry in December were filled with small vacuoles. Plastids and mitoehondrias were located near the nucleus. At this time, almost all starch granules disappeared from the plastids. In January and February, mitochondria, plastids and microbodys of the cortical cell were observed. As increasing temperature from March, dictysomes and polysomes were sparse. Again, starch granules disappeared were observed in the plastids. From the above result, starch granules in plastide of the cortical cell of the mulberry disappeared during cold acclimation stage. After late January, Proplastid was observed in the cortical cell and the ultrastructures of cortical cell were actively changed.
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