• Korean Journal of Plant Taxonomy
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• v.37 no.4
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• pp.387-393
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• 2007

Saussurea grandicapitulata, a new species of Saussurea, was repodrted in the Taebaek Mountains. It has peculiar morphological characters, easily distinguisable from other Saussurea in Korea and Japan; robust plant size, pale green leaf beneath, purplish brown-cobwebby hairs on petioles of radical and lower cauline leaves, few heads with not so long pedicel, big globose involucres with brown-cobwebby hairs, and often recurved long phyllaries. S. grandicapitula is an endemic species to Korea which was differentiated in consequence of adaptation to heavy snowy environment of the Taebaek Mountains.

• Korean Journal of Plant Taxonomy
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• v.50 no.3
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• pp.351-355
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• 2020

Argyreia gyrobracteata Traiperm & Chitchak (Convolvulaceae) is newly recorded in Vietnam. It is similar to A. mekongensis Gagnep & Courch in having a white campanulate corolla but differs from that species by having whitish surface of the abaxial leaf, narrowly lanceolate or linear-oblong, curly, rolled up the bract with a longer length of the petiole and a shorter pedicel. It was previously known only in Thailand, but was recently found in Lam Dong Province, Vietnam, for the first time. The present study provides a detailed description, colorful photos and the distribution of the species. Furthermore, a comparison of the diagnostic characters between this species and a related species in Vietnam, A. mekongensis Gagnep & Courch, is provided.

• Korean Journal Plant Pathology
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• v.14 no.5
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• pp.458-462
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• 1998

Stem rot symptomof lily caused by Phytophthora was observed in Chilkok, Korea in 1997. Oogonia of Phytophthora were abundantly developed on epidermal tissues of stem and leaves of the diseased plants. The casual fungus was identified as Phytophthora cactorum based on their cultural and morphological characteristics. Sporangia were markedly papillate and the shape was broadly spherical to ovoid both on agar and in water. The size was 28~44$\times$20~28 ${\mu}{\textrm}{m}$ (av. 36~24) and a short pedicel was attached to each sporangium. The fungus was homothallic and oogonia were 28~32 ${\mu}{\textrm}{m}$ (av. 30) in size and slightly yellow. Antheridia were paragynous and spherical or irregularly club shaped. Optimal temperature for mycelial growth was 25~27$^{\circ}C$. The fungus did not grow under 6$^{\circ}C$ and over 34$^{\circ}C$. The fungus was highly pathogenic to three cultivars of lily. Symptom was developed at 4-day after artificial inoculation with zoospores (103 cell/ml) on the stem of lily. The symptom was identical to those produced by natural infection in the field and the plant was blighted within 14 days after inoculation.

• The Plant Pathology Journal
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• v.19 no.6
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• pp.291-293
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• 2003

Leaf spot and blight disease of tree peony (Paeonia suffruticosa Andr.) was found in an apartment garden in Daegu in May 2003 for the first time in Korea. The causal organism was identified as Phytophthora cactorum (Leb. And Cohn) Schroeter. The causal fungus was homothallic, and produced distinctively papillate, ovoid to subspherical, and caducous sporangia with pedicel. Sporangia that formed in water measured 23.4-42.9$\times$21.5-35.1 $\mu\textrm{m}$ in range with an average of 35.3$\pm$4.6${\times}$26.9$\pm$36.0 $\mu\textrm{m}$, I/b ratio=1.31, papillae approximately 3.7 $\mu\textrm{m}$ high, and pedicels 2.8 $\mu\textrm{m}$ long. Oogonia were spherical and 21.5-37.1 $\mu\textrm{m}$ in diameter with an average of 29.6$\pm$4.9 $\mu\textrm{m}$. Oospores were spherical, mostly plerotic, and light orange brown when mature, and measured 19.5-31.2 $\mu\textrm{m}$ in diameter with an average of 25.2$\pm$4.4 $\mu\textrm{m}$. Antheridia were almost ovoid or club-shaped and 1l.7-15.6$\times$9.8-11.7 $\mu\textrm{m}$ in size.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.40-40
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• 2018

Pseudostellaria Pax (Caryophyllaceae) is a small genus distributed in temperate region. It consists of 25 species presenting high diversity in Asia. Pseudostellaria longipedicellata S. Lee, K. Heo & S. C. Kim was first announced as new species in 2012. Morphological characters of P. longipedicellata are closely related to those of Psedusotellaria palibiniana and Psedusotellaria okmotoi. These are distinguished from P. longipedicellata by shorter pedicel and puberulent pedicels, respectively and by being distributed allopatically between P. longipedicellata and rest of species. The complete chloroplast genome of P. longipedicellata was successfully rescued from raw reads generated by HiSeq2000. Its total length is 149,626 bp consisting of four regions: large single copy (LSC) region (81,292 bp), small single copy (SSC) region (16,984bp), and inverted repeats (IRs; 25,765 bp per each). It contained 126 genes (81 coding DNA sequence (CDS), eight rRNAs, and 37 tRNAs); 18 genes (seven CDS, four rRNAs, and seven tRNAs) are duplicated in inverted repeat regions. The overall GC content of P. longipedicellata is 36.5% and in the LSC, SSC, and IR regions were 34.3%, 29.3%, and 42.4%, respectively. Based on phylogenetic analysis of chloroplast genomes of P. longipedicellata and relatives species presents clear phylogenetic positions of Pseudostellaria genus. This chloroplast genome will be an important sequence resources for further researches of Pseudostellaria genus.

• Journal of Ginseng Research
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• v.26 no.1
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• pp.17-23
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• 2002

Gibberellic acid (GA) was applied to field-grown 3-year-old North American ginseng (Panax quinqueiolius L.) between 1 and 4 times, before and during bloom in 1999. Applications of both GA$_3$ and GA$\sub$4+7/ four times (x4) to the developing inflorescences increased maximum pedicel length, and seed head diameter and height. Treatment with GA$\sub$4+7/ increased mean and total root fresh weight linearly, whereas those treated with GA$_3$ did not show similar increases. Both GA$_3$ and GA$\sub$4+7/ at 50, 100 and 200 mg L$\^$-1/ (x4) increased the incidence of breaking of dormancy of perennating buds with GA$_3$ being twice as effective as GA$\sub$4+7/. Both GA$_3$ and GA$\sub$4+7/ treatments resulted in an increased number of new bud initials forming per root, with the number of new initials per root increased two-fold by the GA$_3$ sprays compared to GA$\sub$4+7/.

• Korean Journal of Plant Taxonomy
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• v.38 no.3
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• pp.233-250
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• 2008

Morphological and molecular data from the nuclear ribosomal ITS regions were examined to reevaluate the taxonomic position of the Korean endemic species, Stewartia koreana Nakai ex Rehder (Theaceae). Comparing to its morphologically closely related S. pseudocamellia Maxim, S. koreana has diagnostic characters including a larger leaf blade (10 cm length and 5.5 cm wide) and a longer pedicel (2.5 cm length). In addition, S. koreana formed a different clade from S. pseudocamellia in the ITS trees. The morphological and ITS sequence data supported S. koreana as a Korean endemic species distinct from the closely related species, S. pseudocamellia.

• Journal of Species Research
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• v.9 no.2
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• pp.117-121
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• 2020

Prunus glandulosa Thunb. [=Cerasus glandulosa (Thunb.) Sokolov] (Rosaceae) is native to the warmtemperate region of China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hebei, Henan, Jiangsu, Shaanxi, Shandong, Sichuan, Yunnan, and Zhejiang Provinces). It is naturalized in the United States (i.e. Alabama, Michigan and North Carolina) and Canada (Ontario). This species, previously only recorded as introduced or cultivated plants on the Korean Peninsula, was confirmed to be naturally distributed in the southwestern coast islands(i.e. Geomun-do, Chuja-do and an uninhabited island in Shinan-gun of Jeollanam-do). Prunus glandulosa Thunb. is distinguished from a related taxon P. japonica var. nakaii (H. Lév.) Rehder by pedicel 8-12 (-16) mm long, linear stipules, glabrous style, and pink petals. The morphological characters and illustration of P. glandulosa Thunb. are provided with line drawings and photographs from the natural habitat. In addition, it is likely that a new habitat will be found by plant biodiversity investigations through the southwestern coast islands. Further research is needed to determine its population size, distribution, and threats, as well as identify appropriate locations for conservation collection of germplasm.

• Korean Journal Plant Pathology
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• v.13 no.3
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• pp.139-144
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• 1997

A destructive collar rot of apple caused by a species of Phytophthora has widely occurred in Kyungbuk and less extended in Chungbuk, Chungnam and Chunbuk provinces of Korea. Significantly higher incidence of the disease was observed on cv. Fuji when M26 or M9 was used as dwarfing stocks. Incidence of the disease at several orchards in Uisung, Kunwi, Yesan and Muju ranged from 45 to 80%. Twenty-five isolates of the causal fungus were collected and all isolates were identified as P. cactorum on the basis of their cultural and morphological characters. The fungus produced markedly papillate and broadly ovoid deciduous sporangia both on agar and in water, and a short pedicel was attached to each sporangium. Oospores were readily formed on clarified V8 agar by single isolates and all the antheridia were paragynous. The fungus neither grew nor produced oospores under 5 and over 33$^{\circ}C$. The destructive collar rot of apple caused by P. cactorum has not been reported in Korea previously.

• Korean Journal of Medicinal Crop Science
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• v.4 no.3
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• pp.199-204
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• 1996

We investigated the structures of floral organs and the developmental process of each floral organs in Bupleurum falcatum. The overall size of a floral was about 2mm. The lengths of ray, pedicel, pistil and stamen were 22.5mm, 3.6mm, 1.0mm and 1.3mm respectively. The ovary surface was 0.9mm in length and 1.4mm in width. And the developmental periods of each floral organs were as follows; 1 through 6 days in stamen emergence, 6 through 9 days in petal detachment and pistil emergence, 9 through 16 days in pistil ma­turation, and above 16 days in pistil degeneration after onset of flowering. This plant was admitted to be a allogamous plant, especially with the protandry form of dichogamy.