• Korean Journal Plant Pathology
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• v.14 no.6
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• pp.729-731
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• 1998

A black leg disease in wasabi occurred, showed black spots on the leaves, changed a rhizome color to black by invading the vascular bundles of stem and root, thus lowered the quality of the rhizome. The mycelium of the pathogen was yellow at first and then turned to dark yellow on oat meal agar medium. The pycnidium was globose or subglobose, dark brown in color, and 44~120$\times$28~170 ${\mu}{\textrm}{m}$ in size and had one or two ostioles on the upper part. The pycnidiospores are single-celled, hyaline, and 4~6$\times$1.2~2.3 ${\mu}{\textrm}{m}$ in size. The causal pathogen was identified as Phoma wasabiae. The black leg disease of wasabi occurred within the range of 28 to 32% at Chonbuk province in 1994~1995. The disease was appeared from April to October and severe in June and July. The black leg caused by P. wasabiae was first described in Korea.

• Journal of Ecology and Environment
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• v.41 no.9
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• pp.256-264
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• 2017

Background: The aim of this study was to clarify the relationship between the sexual reproduction and the resource allocation in a natural Polygonatum humile population grown in a temperate mixed forest gap. For this aim, the plant size, the node which flower was formed, the fruiting rate, and the dry weight of each organ were monitored from June 2014 to August 2015. Results: Firstly, in 3-13-leaf plants, plants with leaves ${\leq}8$ did not have flowers and in plants with over 9 leaves the flowering rate increased with the number of leaves. Among plants with the same number of leaves, the total leaf area and dry weight of flowering plants were larger than those of non-flowering plants. The minimum leaf area and dry weight of flowering plants were $100cm^2$ and 200 mg, respectively. Secondary, the flowers were formed at the 3rd~8th nodes, and the flowering rate was highest at the 5th node. Thirdly, cumulative values of leaf properties from the last leaf (the top leaf on a stem) to the same leaf rank were greater in a plant with a reproductive organ than in a plant without a reproductive organ. Fourthly, fruit set was 6.1% and faithful fruit was 2.6% of total flowers. Biomasses of new rhizomes produced per milligram dry weight of leaf were $0.397{\pm}190mg$ in plants that set fruit and $0.520{\pm}0.263mg$ in plants that did not, and the difference between the 2 plant groups was significant at the 0.1% level. Conclusions: P. humile showed that the 1st flower formed on the 3rd node from the shoot's base. And P. humile showed the minimum plant size needed in fruiting, and fruiting restricted the growth of new rhizomes. However, the fruiting rate was very low. Thus, it was thought that the low fruiting rate caused more energy to invest in the rhizomes, leading to a longer rhizome. A longer rhizome was thought to be more advantageous than a short one to avoid the shading.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2003.10b
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• pp.50-56
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• 2003

In an effort to produce high quality Curcuma aromatica Salisbury in the southern area of Korea, a variety of shade-method was used to prevent withering during the summer. The experimental results are summarized as follows. The effect of shading on emergence of Curcuma aromatica Salisbury rhizome was none or very little. The effect of shading on the growth and development of Curcuma aromatica Salisbury was the highest under a shade rate of 15∼30%. In this case the size of the plant height was the biggest and leaves the largest, thus showing the best condition for plant growth. The growth of rhizome under a shade rate of 15% was more active than that without shading. The weight of rhizome in this case was the largest, and thus showing the best condition for rhizome growth.

• Korean Journal of Plant Resources
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• v.16 no.3
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• pp.207-211
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• 2003

In an effort to produce high quality Curcuma aromatica Salisbury in the southern area of Korea, a variety of shade­method was used to prevent withering during the summer. The experimental results are summarized as follows. The effect of shading on emergence of Curcuma aromatica Salisbury rhizome was none or very little. The effect of shading on the growth and development of Curcuma aromatica Salisbury was the highest under a shade rate of 15­30％. In this case the size of the plant height was the biggest and loaves the largest, thus showing the best condition for plant growth. The growth of rhizome under a shade rate of 15％ was more active than that without shading. The weight of rhizome in this case was the largest, and thus showing the best condition for rhizome growth.

• Korean Journal of Plant Resources
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• v.14 no.3
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• pp.188-195
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• 2001

The anatomical characteristics of rhizome, lateral root, stem, leaf, petiole, ovary and leaf epidermis about Atractylodes japonica Koidz. ex Kitam. and A. macrocephala Koidz. were investigated to estimate these taxonomic values. The cross sections of stem and ovary were very similar to two species, therefore these characters were not useful for delimitation of two species, but the size and distribution numbers per 100${\mu}{\textrm}{m}$$^2$of oil cavites in rhizome, the shape of leaf and petiole in cross section, the size of leaf epidermal cell and distribution numbers per 100 ${\mu}{\textrm}{m}$$^2$of stomata were differ from two species, therefore these were thought to be useful characters for delimitation of two species.

• Korean Journal of Plant Taxonomy
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• v.47 no.2
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• pp.119-123
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• 2017

A new unrecorded species, Hypodematium squamuloso-pilosum Ching (Hypodematiaceae), previously known only in China, was newly found on the rocks of a limestone mountain in Yeongwol-gun, Gangwondo, Korea. This taxon is distinguished from H. glanduloso-pilosum (Tagawa) Ohwi, reported as a species of Hypodematium in Korea based on linear lanceolate scales on the rhizome and a stipe base, white long hairs throughout the leaves, rarely reddish brown curly linear scales on the stipe, and oblong-lanceolate basal pinna. This taxon was most similar to H. hirsutum based on the plant height, rhizome, scale shape and size, sori position, and indusium shape. A new Korean name, 'Huin-geum-teol-go-sa-ri', was given based on the long white hair throughout. Descriptions and illustrations of this taxon and a photograph of its habitat are provided from Korea.

• Korean Journal of Weed Science
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• v.9 no.1
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• pp.28-33
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• 1989

This study was examined for the effect of tuber size, bud and tuber removal, and tuber cutting on growth of Eleockaris kuroguwai Ohwi. Elongation of plumule and radicle, and the weights of tuber, rhizome and shoot were increased as tuber size is large. The weights of shoot and tuber reduced by bud planting without tuber at 15 days after budding, however number of tubers were increased compared with normal tuber. When cross-cutting tubers were seeded, the weights of shoot, rhizome and tuber were produced as 84%, 85%, 71%, respectively compared with normal tuber, and the number of tubers was not influenced. The weights of tuber, rhizome and shoot were lowed as the bud removal, and there were a great number of tubers at bud removal of 15 days after budding. Tuber of E. k, contained as nonfibrous 78.9gr, phosphorous 77mg, iron 16.8mg, niacin 1.3mg per 100gr edble portion. The positive correlations were observed between shoot weight and tuber weight, and number of tubers.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2007.05a
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• pp.253-256
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• 2007

• Mycobiology
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• v.33 no.1
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• pp.7-11
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• 2005

Twenty-two isolates of Sclerotium rolfsii causing spotted leaf rot from Varanasi, India were grown on 6% Cyperus rotundus rhizome meal agar (CRMA) medium for the induction of athelial stage (Athelia rolfsii). Only one isolate obtained from Sphaeranthus indicus formed basidial stage on CRMA medium while the other 21 isolates did not. Basidial stage was also produced in S. indicus isolate at different concentrations (5.5, 6.0 and 6.5% w/v) of CRMA medium. Size of basidia, sterigmata and basidiospores of this isolate was measured. Basidia clavate, hyaline and measured $10{\sim}12{\times}4{\sim}5\;{\mu}m$ in size, basidiospores hyaline, unicellular, subglobose to ellipsoid produced on sterigmata and measured $3{\sim}5{\times}2{\sim}4\;{\mu}m$ in size, sterigmata hyaline and measured $4{\sim}5{\times}1.5{\sim}2\;{\mu}m$ in size. The results of the present study revealed wide variation in spotted leaf rot isolates of S. rolfsii. A reddish zone around the colony of S. rolfsii isolate from Vernonia sp. was observed on CRMA medium. HPLC analysis of the zone revealed the presence of gallic and ferulic acid which were also thought to be responsible for reduced mycelial growth of the isolate on CRMA medium.

• Korean Journal of Plant Resources
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• v.12 no.4
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• pp.289-296
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• 1999

The availability of Bacillus polimyxa 'HB 26-5' as a biological control agent was investigated. The antagonistic bacteria Bacillus polymyxa 'HB 26-5' grew well on the media at pH 7.0 and the optimum growth temperature was $25^{\circ}C$. The pH of the media changed to weak acid(pH 6.1~6.5) at the beginning of incubation, but to weak alkali(pH 7.8~8.2) at 7days after incubation. The best carrier to enhance colonization of the bacteria were the mixture of rice bran and peat, or rice bran and kaoline, in those formulation the density of the bacteria was changed slightly, though the density was beginning to decrease 3 weeks after application at field. In view of the physical characteristics of the formulation for the density maintenance during storage such as the hardness and the size, the best one was the formulation consisted of sodium alginate 2%, kaolin 15% and rice bran 3%.