• ALGAE
• /
• 제21권1호
• /
• pp.15-48
• /
• 2006

The genus Martensia (Delesseriaceae, Rhodophyta) is characterized by thalli composed of one to several blades that consist of proximal membranous sections and distal latticework. Nerves or veins are absent in the membranous sections. The life cycle of Martensia is accomplished by isomorphic alternation of generations. The gametophytes of Martensia are dioecious, and the male and female gametangial plants are morphologically similar. The type species of Martensia is M. elegans Hering. In this study, nine species were confirmed to occur in the subtidal regions of Jeju Island, Korea: M. albida sp. nov., M. australis Harvey, M. bibarii Y. Lee, M. elegans Hering, M. flammifolia sp. nov, M. fragilis Harvey, M. jejuensis Y. Lee, M. palmata Y. Lee, and M. projecta Y. Lee. Three of these, M. australis, M. fragilis, and M. elegans, are new records in the flora of Korea. The results of molecular analyses of the internal transcribed spacer (ITS) 1 region in the nrDNA showed that M. elegans is identical to M. australis, and M. fragilis coincides with M. bibarii. It may be a less effective tool for the species discrimination in Martensia.

• 한국수산과학회지
• /
• 제50권2호
• /
• pp.175-182
• /
• 2017

We examined the effects of environmental factors on zoospore release and germling growth of the green tide alga Cladophora albida under various conditions of temperature${\times}$irradiance (zoospore release), temperature${\times}$irradiance${\times}$ nutrient (germling growth), and a single factor test of salinity. Zoospore release was maximized at $30^{\circ}C$ and $100{\mu}mol\;photons\;m^{-2}s^{-1}$ in the temperature irradiance experiment and at 34 psu in the salinity experiment. Maximum germling growth was observed at $25^{\circ}C$ with $100{\mu}mol\;photons\;m^{-2}s^{-1}$ and PES (Provasoli's Enriched Seawater) in the temperature irradiance nutrient experiment, and at 34 psu in the salinity experiment. Germlings grew faster at higher irradiances for a given temperature level, and also grew faster as salinity increased over the range of 5-34 psu. Overall, optimal environmental conditions for zoospore release were $30^{\circ}C$, $100{\mu}mol\;photons\;m^{-2}s^{-1}$ and 34 psu. Maximal germling growth occurred at $25^{\circ}C$, $100{\mu}mol\;photons\;m^{-2}s^{-1}$, PES, and 34 psu. C. albida blooms are most likely to occur under these optimal environmental conditions, as plentiful zoospore release and rapid germling growth lead to population growth.

• The Plant Pathology Journal
• /
• 제29권3호
• /
• pp.242-248
• /
• 2013

In the Northeast of Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production of guava seedlings and their tolerance to M. enterolobii. Seedlings of guava were inoculated with 200 spores of Gigaspora albida, Glomus etunicatum or Acaulospora longula and 55 days later with 4,000 eggs of M. enterolobii. The interactions between the AMF and M. enterolobii were assessed by measuring leaf number, aerial dry biomass, $CO_2$ evolution and arbuscular and total mycorrhizal colonization. In general, plant growth was improved by the treatments with A. longula or with G. albida. The presence of the nematode decreased arbuscular colonization and increased general enzymatic activity. Higher dehydrogenase activity occurred with the A. longula treatment and $CO_2$ evolution was higher in the control with the nematode. More spores and higher production of glomalin-related soil proteins were observed in the treatment with G. albida. The numbers of galls, egg masses and eggs were reduced in the presence of A. longula. Inoculation with this fungus benefitted plant growth and decreased nematode reproduction.

• 식물분류학회지
• /
• 제53권1호
• /
• pp.65-68
• /
• 2023

The herb Pedicularis cheilanthifolia var. albida (Pennell) P. C. Tsoong is reported and collected for the first time from the Rudraprayag District of Uttarakhand. The species was seen growing along a glacial stream in an alpine region between 4,100 and 4,400 m asl. Morphological characteristics of the species were examined and processed for herbarium deposition. To simplify taxon identification, a brief taxonomic description and illustration of the taxon are provided.

• 한국환경생태학회지
• /
• 제16권4호
• /
• pp.345-358
• /
• 2003

백두대간 여원재～시리봉일대 중 고남산(846.5m)과 시리봉(776.8m)일대 2구간의 관속식물상을 조사한 결파 89과 193속 245종 44변종 6품종 총 295종류(Taxa)를 확인하였다. 또한 백두대간 권역의 한국특산식물과 산림청과 임업연구원(1997)의 ‘회귀 및 멸종위기식물을 조사한 결과 한국특산식물은 일월비비추. 죽대, 흘아비꽃대, 호랑버들, 할미밀망, 조팝나무, 나비나물, 태백제비꽃, 말채나무, 병꽃나무 총 10종류, 회귀 및 멸종위기식물종은 꽃창포, 태백제비꽃, 쥐방울덩굴 총 3종류를 확인하였다. 식물 서식처 조사 결과 위협요인으로는 등산객으로 인한 훼손, 관목림으로 인한 피압 등이었다.

• The Plant Pathology Journal
• /
• 제33권3호
• /
• pp.329-336
• /
• 2017

An experiment was conducted to evaluate the tolerance of micropropagated and mycorrhized alpinia plants to the parasite Meloidogyne arenaria. The experimental design was completely randomized with a factorial arrangement of four inoculation treatments with arbuscular mycorrhizal fungi (AMF) (Gigaspora albida, Claroideoglomus etunicatum, Acaulospora longula, and a non-inoculated control) in the presence or absence of M. arenaria with five replicates. The following characteristics were evaluated after 270 days of mycorrhization and 170 days of M. arenaria inoculation: height, number of leaves and tillers, fresh mass of aerial and subterranean parts, dry mass of aerial parts, foliar area, nutritional content, mycorrhizal colonization, AMF sporulation, and the number of galls, egg masses, and eggs. The results indicated a significant interaction between the treatments for AMF spore density, total mycorrhizal colonization, and nutrient content (Zn, Na, and N), while the remaining parameters were influenced by either AMF or nematodes. Plants inoculated with A. longula or C. etunicatum exhibited greater growth than the control. Lower N content was observed in plants inoculated with AMF, while Zn and Na were found in larger quantities in plants inoculated with C. etunicatum. Fewer galls were observed on mycorrhized plants, and egg mass production and the number of eggs were lower in plants inoculated with G. albida. Plants inoculated with A. longula showed a higher percentage of total mycorrhizal colonization in the presence of the nematode. Therefore, the association of micropropagated alpinia plants and A. longula enhanced tolerance to parasitism by M. arenaria.

• The Korean Journal of Ecology
• /
• 제18권4호
• /
• pp.451-462
• /
• 1995

A comparative study on the minimal areas and the community structures in pine IPinus densiflora) and oak (Quercus mongolica) frests was carried out. Basic tools used in the present study were species diversity and classical ayntaxonomy (Z.-M. School) of the phytocoenosis. Total 120 nest-quadrats in 40 stands situated at the syngeographical region of the Lindero-Quercion mongolicae were investigated. Each stand was classified on the basis of species combination, and species abundance was computed with net contribution degree (NCD). Composition ratio of plant-from and rate of actual species diversity (ASD) to syntaxa were computed for better interpretation of the minimal areas. Four syntaxa were structured: Saso-Quercetum mongolicae, Viola albida-Quercus mongolica community, Carex hummilis-Pinus densiflora community and Juniperus rigida-Pinus densiflora community. Their minimal areas were determined as 305, 196, 169, and 81 ㎡, respectively. Aconsistent regularity between species composition ratio and community structure in the multi-layered plant community was hardly found. The minimal areas increased linearly with increasing rate of ASD, and a phytocoenosis developed by diverse arboreta in the understory and shrub-layer should be investigated with larger sampling sizes.

• 한국환경복원기술학회지
• /
• 제16권1호
• /
• pp.109-130
• /
• 2013

This study is to offer the raw data for conservation and restoration of national park by surveying and analysing the vascular plants in the Gayasan national park. The flora were summarized as 102 families, 328 genera, 469 species, 4 subspecies, 59 varieties and 9 forms. The endangered plants designated by Ministry of Environment were 2 taxa; Pedicularis hallaisanensis Hurus. and Gymnadenia conopsea for. albiflora Y.N.Lee. The rare plants designated by Korea Forest Service were 13 taxa; Crypsinus hastatus (Thunb.) Copel., Ligusticum tachiroei (Franch. & Sav.) M. Hiroe & Constance, Primula modesta var. fauriae (Franch.) Takeda, Lilium distichum Nakai ex Kamibay and so forth. The korean endemic plants were 15 taxa; Betula ermanii Cham., Carpinus laxiflora (Siebold & Zucc.) Blume, Stewartia pseudocamellia Maxim., Galium koreanum (Nakai) Nakai, Heloniopsis koreana Fuse, N.S. Lee & M.N. Tamura and so forth. The specific plants by floristic region were 66 taxa; Betula chinensis Maxim., Spiraea fritschiana Schneid., Vaccinium hirtum var. koreanum (Nakai) Kitam., Cimicifuga heracleifolia Kom., Adoxa moschatellina L. and so forth. The plants with approval for delivering oversea were 22 taxa; Salix hallaisanensis H.L$\acute{e}$v., Sanguisorba argutidens Nakai, Viola albida Palib., Weigela subsessilis (Nakai) L.H.Bailey and so forth. The naturalized plants were 30 taxa; Chenopodium album L., Lepidium apetalum Willd., Trifolium pratense L., Bidens frondosa L., Helianthus tuberosus L. and so forth.

• 한국환경생태학회지
• /
• 제29권6호
• /
• pp.819-841
• /
• 2015

본 연구는 소백산맥 중 덕유산과 백운산의 사이에 위치한 할미봉(1,026m)과 구시봉(1,014m)을 대상으로 주요 관속식물상을 파악하여 주요식물에 대한 효율적인 관리와 보전 및 그 일대 식물자원의 기초자료를 제공하기 위해 수행하였다. 현지조사는 2013년 3월부터 2014년 3월까지 계절별 조사를 실시하였으며, 조사경로는 계곡부, 능선부, 사면부 등을 포함하여 조사를 실시하였다. 조사 결과 할미봉과 구시봉 일대에서 출현한 관속식물은 총 95과 287속 454종 4아종 59변종 11품종 528분류군이 조사되었다. 희귀식물은 EN등급(위기종) 1분류군(흰참꽃나무), VU등급(취약종) 2분류군(쇠채, 솔나리), LC등급(약관심종) 12분류군(구상나무, 매미꽃, 태백제비꽃 등) 총 10과 14속 13종 2변종 15분류군이 조사되었다. 특산식물은 처녀치마 등 15분류군이 나타났다. 식물구계학적 특정식물 V등급은 승마 등 2분류군, IV등급은 개대황 등 6분류군, III등급은 거제수나무 등 12분류군이 각각 출현하여 I등급부터 V등급까지 총 32과 52속 58종 1아종 2변종 61분류군이 출현하였다. 귀화식물은 소리쟁이, 족제비싸리, 선개불알풀 등 23종이 출현하였다.

• 한국환경생태학회지
• /
• 제17권3호
• /
• pp.210-223
• /
• 2003

본 연구는 백운산의 식물상을 조사하기 위해 수행되었으며. 기간은 2000년 10월부터 2001년 8월까지 조사하였다. 충북 백운산(1,087m)의 관속식물상을 조사한 결과, 90과 273속 411종 1아종 49변종 7품종 등 총 468종류(Taxa)가 확인되었다. 그리고 본 대상지의 희귀 및 멸종위기식물을 조사한 결과 천마. 말나리, 금강제비꽃, 매미꽃. 도깨비부채, 쥐방울덩굴, 개족도리, 태백제비꽃, 미치광이풀. 토현삼 등 총 10종류로 나타났으며. 한국 특산식물은 개족도리. 가는장구채, 할미밀망, 진범, 매미꽃, 흰털괭이눈, 조팝나무, 가시딸기, 광릉갈퀴, 뽕잎피나무, 서울제비꽃, 금강제비꽃, 자란초, 토현삼, 병꽃나무, 털잔대, 고려엉겅퀴, 각시서덜취, 분취 등 19종류로 조사되었다.