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Çѱ¹½Ä¹°ÇÐȸ / v.35, no.2, 1992³â, pp.143-153
¿Õº¢³ª¹« È­¿Ü¹Ð¼±ÀÇ ´ç¾× ºÐºñ¿¡ °üÇÑ ¹Ì¼¼±¸Á¶Àû ¿¬±¸
( Ultrasturctural Study on Nectar Secretion from Extrafloral Nectary of Prunus yedoensis Matsumura )
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Çѱ¹»ê ¿Õº¢³ª¹«(Prunus yedoensis Matsumura) È­¿Ü¹Ð¼±ÀÇ ¹Ì¼¼±¸Á¶ ¹× ´ç¾× ºÐºñ±âÀÛÀ» ±Ô¸íÇϱâ À§ÇÏ¿© ±¤ÇÐÇö¹Ì°æ, ÁÖ»çÇü ¹× Åõ°úÇü ÀüÀÚÇö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© °üÂûÇÏ¿´´Ù. ¹Ð¼±Àº secretory layer¿Í subsecretory layer·Î ±¸¼ºµÇ¾î ÀÖ¾úÀ¸¸ç ¿±º´ÀÇ À¯°ü¼ÓÀº subsecretory layer¿¡ ÀÖ´Â À¯°ü¼Ó°ú ¿¬°áµÇ¾î ÀÖ¾ú´Ù. Secretory cell¿¡¼­´Â cristae°¡ Àß ¹ß´ÞµÇÁö ¾ÊÀº ´Ù¼öÀÇ mitochonidria°¡ °üÂûµÇ¾úÀ¸³ª ¼ÒÆ÷ü´Â ¼Ò¼ö ³ªÅ¸³µ°í °ñÁöü°¡ ÀüÇô °üÂûµÇÁö ¾Ê¾Ò´Ù. »ö¼Òü´Â thylakoid°¡ °ÅÀÇ ¹ß´ÞµÇÁö ¾Ê¾ÒÀ¸¸ç, ¼Ò¼ö°¡ °üÂûµÇ¾ú°í $0.2-0.3;mu extrm{m}$ Å©±âÀÇ ¼ÒÆ÷¸¦ Ư¡ÀûÀ¸·Î °®°í ÀÖ¾ú´Ù. subsecretory cell¿¡¼­´Â ¿øÇüÁú ¿¬¶ô»ç°¡ Àß ¹ß´ÞÇØ ÀÖ¾ú°í ´Ù¼öÀÇ Calcium oxalate °áÁ¤ÀÌ °üÂûµÇ¾ú´Âµ¥ ÀÌ´Â ´çÅõ°ú¿¡ °£Á¢ÀûÀ¸·Î °ü¿©ÇÏ´Â °Í °°´Ù. ´ç¾× Àü±¸¹°ÁúÀº »çºÎ¿¡¼­ subsecretory layer¸¦ °ÅÃÄ secretory layer±îÁö À̵¿ÇÏ´Â °ÍÀ» ¿øÇüÁú ¿¬¶ô»ç¸¦ ÅëÇÑ symplastic transport¿¡ ÀÇÇÏ¿© ÀϾ´Â °ÍÀ¸·Î »ý°¢µÇ¸ç secretory layer¿¡¼­ ´ç¾×À¸·Î ÀçÇÕ¼ºµÇ¾î ¿ÜºÎ·Î ¹èÃâµÇ´Â °Í °°´Ù. Secertory cellÀÇ ¸Ç ¹Ù±ùÂÊ ¼¼Æ÷º®Àº cuticle ¿¡ ÀÇÇÏ¿© µ¤¿© ÀÖ¾úÀ¸¸ç secretory cell¿¡¼­ ´ç¾×Àº ¿øÇüÁú¸·, ¼¼Æ÷º®, cuticleÀ» Â÷·Ê·Î Åë°úÇÏ´Â ´©Ãâ»ó ºÐºñ(eccrine secretion)¿¡ ÀÇÇÏ¿© ºÐºñµÇ´Â °ÍÀ¸·Î »ç·áµÈ´Ù.
Nectar secretion from extrafloral nectary cells of Prunus yedoensis was examined by light and electron microscopy. Nectaries were composed of two or three layers of secretory cells and one layer of subsectretory cells. Vascular bundles in the petioles were connected to those of the subsectretory cell layer. Secretory cells had a number of mitochondria with poorly developed cristae. Plastids had little thylakoids and small vesicles, about 0.2 to 0.3 mm in diameter; however, no plastids had starch grains. Calcium oxalate crystals and plasmodesmata were frequently observed in the subsectretory and secretory cells, respectively. And nectar substances were observed in phloem of petiole, subsectretory, and secretory cells of the secretory gland. These results suggested that the nectar moved by symplastic transport through the plasmodesmata. On the other hand, the nectar droplets were observed in the secretory cell walls. in the cuticular layer just beyond of the former, and on the outer surface of the cuticular layer: such observations indicated that a apoplastic movement was involved in the final step of the nectar secretion. Cellular components related to the nectar transport, such as plasma membrane, cell wall and cuticle were not destroyed but intact: it was interpreted as a eccrine secretion.retion.
 
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Journal of Plant Biology / v.35, no.2, 1992³â, pp.143-153
Çѱ¹½Ä¹°ÇÐȸ
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199211920116017)
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