• Journal of Applied Biological Chemistry
• /
• v.50 no.4
• /
• pp.288-292
• /
• 2007

• Herbal Formula Science
• /
• v.14 no.1
• /
• pp.74-81
• /
• 2006

Objectives: The aim of this work is the making of morphological standard in platycodi radix. Methods: The external-internal morphological standards were determined by using stereoscope and butanol series. Conclusions: The external and internal characteristics according to the shape of original plant or herbal states. entirely correspond to all the literature on this subject. According to the place of production. the difference appears. (1) In the external shapes. as the Korean products. the distinction among the first. medium. poor class products was caused by the state of processing of desiccation. But as the foreign products, it was caused by the difference of size, color and especially color of circle. (2) In the internal shapes. the Mt. Baekdu region products is not skinned and has the deep state of suberization of cork phellogen. so it makes certain distinctional point. And the Korean products has the much latex tube group relatively and the bigger crevice than the foreign one.

• Korean journal of applied entomology
• /
• v.22 no.3 s.56
• /
• pp.181-185
• /
• 1983

Ditylenchus destructor Thorne 1945 was found to be the causal organism of the new root rot disease of Panax ginseng, which occurred extensively in Dongseong area of Cheolweon-gun, Gangweon Province, Korea in 1982. Thirty-six percent of the investigated fields was damaged due to the potato rot nematode. Infected roots showed brown discoloration of cortex and suberization outside the cambium. Cortex of the severly infected roots became sponge-like in texture and cavity was produced in the central portion of the root. Only the severely infected ginseng plants exhibited sympotoms of sudden wilting of leaves. The number of potato rot nematode in such field soils was $8.5\~222/30g$ soil, while there was no such symptoms on leaves if the number was less than 7.

• Horticultural Science & Technology
• /
• v.28 no.3
• /
• pp.381-386
• /
• 2010

The berry growth and pericarp characteristics were characterized to confirm the effects of bagging periods on berry cracking during berry development in 'Kyoho' grape. The berry weight was the highest at 13.4 g in late period of bagging treated at 7 to 9 weeks after full bloom (WAFB) as compared with the lowest of 12.3 g in total period bagging. The berry cracking rate under critical turgor pressure in the non-bagging control was 53.3%, while those of bagging treatments were decreased in the order of 42.7%, 37.3%, 33.3%, and 18.7% in bagged during 3 to 9, 3 to 5, 5 to 7, and 7 to 9 WAFB, respectively. In the results of observation on histological characteristics of pericarp, berry lenticels of whole bagging treatments had smaller and normal shape compared with non-bagging control treatment. Especially on the pericarp of late period bagged during 7 to 9 WAFB, suberization around stomata and micro-cracking were not observed and structural strength of pericarp was increased with thicker sub-epidermal layer and cell wall. Therefore, the results indicate that bagging treatment for two weeks just before the veraison when the day length and daylight is relatively longer and stronger can effectively reduce berry cracking by strengthening structure of pericarp in 'Kyoho' grape.