• 제목/요약/키워드: ascospores

검색결과 137건 처리시간 0.028초

맥류(麥類) 붉은곰팡이병(病)적미병(赤黴病)의 1차(次) 전염원(傳染源)인 자낭포자(子囊胞子)의 비산(飛散)에 관한 조사(調査) (An Investigation on Ascospore Flight of the Wheat Scab Fungus Caused by Gibberella zeae as a Primary Inoculum)

  • 정봉구;심재섭;성재모;허노열;박인선
    • 한국균학회지
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    • 제10권2호
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    • pp.85-88
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    • 1982
  • 맥류(麥類) 붉은곰팡이병(病)의 제(第)1차(次) 전염원(傳染源)인 자낭포자(子囊胞子)의 비산상황(飛散狀況)을 조사(調査)하여 본병(本病)의 발생(發生)을 사전(事前)에 예찰(豫察)코져 3개(個) 지역(地域)에서 2개년간(個年間) 시험(試驗)하여 다음과 같은 결과(結果)를 얻었다. 1) 맥류병(麥類病) 예찰포장(豫察圃場)에 회전식(廻轉式) 포자채집기(胞子採集器)를 설치(設置)하여 매일(每日) 자낭포자(子囊胞子)의 비산상황(飛散狀況)을 조사(調査)한 결과(結果) 그 자낭포자(子囊胞子)의 비산(飛散)은 4월(月) 초순(初旬)부터 시작(始作)되며 그 비산(飛散) 포자(胞子)의 수(數)는 지역(地域)에 따라 달라 중부(中部)인 수원(水原)보다 남부(南部) 답리작(畓裏作) 지대(地帶)인 광주(光州) 나주(羅州)에서 많았다. 2) 1979년(年)과 1980년(年) 공(共)히 강우량(降雨量)이 많은 경우(傾遇) 자낭포자(子囊胞子)의 비산수(飛散數)도 많은 경향(傾向)이었다. 3) 맥류(麥類) 붉은곰팡이병(病)의 1차(次) 전염원(傳染源)인 자낭포자(子囊胞子) 비산량(飛散量)과 강우량(降雨量)은 고도(高度)의 정(正)의 상관관계(相關關係)임을 보여주었다. 4) 3개(個) 지역(地域)인 수원(水原) 광주(光州) 나주(羅州)에서의 2년간(年間) 조사결과(調査結果)로 본(本) 병(病)에 대(對)한 과학적(科學的) 예찰(豫察)이 가능(可能)하게 되었으며 이를 전국적(全國的)으로 확대(擴大) 실시(實施)하여 맥류(麥類) 증산(增産)에 기여(寄與)할 것이다.

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A New Record of the Genus Mycobilimbia (Ramalinaceae) from South Korea

  • Joshi, Santosh;Hur, Jae-Seoun
    • Mycobiology
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    • 제40권2호
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    • pp.91-93
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    • 2012
  • The study introduces the genus Mycobilimbia, from South Korea. M. philippina is reported here as being new to the country. Characteristic features of the species are crustose thallus, globose apothecia, K-proper exciple and hypothecium, Biatora-type asci, 3-septate fusiform ascospores, and a lack of secondary compounds.

대만산 Xylaria속 열대종의 분류학적 특성 (Taxonomical Characteristics of Tropical Species of Xylaria Collected from Taiwan)

  • 이양수
    • 한국균학회지
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    • 제27권1호통권88호
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    • pp.73-75
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    • 1999
  • Three species of the genus Xylaria are recognized on Taiwan materials: X. allantoidea (Berk.) Fr. and X. obovata (Berk.) Fr.; including one new record X. curta Fr., having $9.0-10.8{\times}3.9-5.4\;{\mu}m$ ascospores, in Taiwan. The collection of Xylaria allantoidea from Taiwan is compared to other collections in morphological characters. The species are described from the host and in culture by a bright microscope and a scanning electron microscope.

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Elsinoe araliae에 의한 두릅나무 더뎅이병 (Scab Disease of Aralia elata Caused by Elsinoe araliae)

  • 최준근;김종진;정태성
    • 한국식물병리학회지
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    • 제14권5호
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    • pp.545-547
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    • 1998
  • Scab disease of Aralia elata (Miq.) Seemann occurred severely in Kangwon province, Korea. First, brown spots were formed on leaves and enlarged along vein. The infected leaves including petiole and midrib were twisted forming scab and died eventually. Also the disease infected twigs and trunks of the tree forming scab. Conidia, ascospores and asci developed in locule were observed in the infected tissue. The causal organism of the scab disease of Araliae elata was isolated and identified as Elsinoe araliae Yamamoto (imperfect stage: Sphaceloma araliae Jenkins) based on the morphological and cultural characteristics, and pathogenic test.

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A Note on Biscogniauxia nummularium var. merrillii, Wood-inhabiting Fungus

  • Lee, Yang-Soo
    • Mycobiology
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    • 제32권4호
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    • pp.199-201
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    • 2004
  • The genus Biscogniauxia is a member of the Xylariaceae that has brown to dark brown and phaseoliform single cell ascospores with a conspicuous full germ slit. The isolates of Biscogniauxia collected from Mt. Nejang-san in Korea are compared with similar taxa and described. The isolation of B. nummularia var. merrillii is the first record with a precise description in Korea.

Graphis lueckingiana, a New Species from Cameroon

  • Joshi, Santosh;Upreti, Dalip K.;Hur, Jae-Seoun
    • 한국균학회지
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    • 제46권4호
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    • pp.491-494
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    • 2018
  • A new species of Graphis is described from Cameroon, Africa. The new taxon is distinguished by a greyish-green, glossy, uneven, and continuous thallus. Further, it possesses stellately branched lirellae, and its entire labia are covered almost completely with thick thalline margin. It also has a completely carbonized proper exciple, which is considerably thick at the base, one-spored asci, and muriform hyaline to yellowish ascospores.

신품종 번데기동충하초 『예당 3호』 육성 및 특성 (Characteristics and breeding of a new variety Cordyceps militaris 『Yedang 3』)

  • 최영상;김홍규;이병주;김용균
    • 한국버섯학회지
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    • 제7권4호
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    • pp.182-186
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    • 2009
  • 기존의 번데기동충하초의 자실체 생산은 자연계에서 채집된 버섯의 조직을 분리하거나 다중의 포자를 이용하는 방법이 대표적이었으나 본 연구를 수행한 결과, 단포자를 선발한 후 교배조합에 의한 F1균주를 이용한 배양이 안정적임을 확인 할 수 있었다. 단포자의 특성으로는 자실체의 형성이 양호하며 균주의 안정성이 우수한 균주를 선발하고 조합형성능이 우수한 균주를 선발하여야 한다. 본 연구를 통하여 06S05의 단포자를 획득하였으며 06S05${\times}$06S01, 06S05${\times}$06S33균주를 선발하였으며 06S05${\times}$06S33균주를 예당 3호로 명명하여 국립종 자원에 품종보호 등록되었다.

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Isolation of Lichen-forming Fungi from Hungarian Lichens and Their Antifungal Activity Against Fungal Pathogens of Hot Pepper Anthracnose

  • Jeon, Hae-Sook;Lokos, Laszlo;Han, Keon-Seon;Ryu, Jung-Ae;Kim, Jung-A;Koh, Young-Jin;Hur, Jae-Seoun
    • The Plant Pathology Journal
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    • 제25권1호
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    • pp.38-46
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    • 2009
  • Lichen-forming fungi (LEF) were isolated from 67 Hungarian lichen species from ascospores or thallus fragments. LFF were successfully isolated from 26 species with isolation rate of 38.8%. Of the total number of isolation from ascospores (27 species) and thallus fragments (40 species), 48% and 32.5% of the species were successfully isolated, respectively. Comparison of rDNA sequences of ITS regions between the isolated LFF and the original thallus confirmed that all the isolates originated from the thallus fragments were LEF. The following 14 species of LEF were newly isolated in this study; Acarospora cervina, Bacidia rubella, Cladonia pyxidata, Lasallia pustulata, Lecania hyaline, Lecanora argentata, Parmelina tiliacea, Parmotrema chinense, Physconia distorta, Protoparmeliopsis muralis, Ramalina pollinaria, Sarcogyne regularis, Umbilicaria hirsuta, Xanthoparmelia conspersa and X. stenophylla. Antifungal activity of the Hungarian LFF was evaluated against plant pathogenic fungi of Colletotrichum acutatum, C. coccodes and C. gloeosporioides, causal agent of anthracnose on hot pepper. Among the 26 isolates, 11 LFF showed more than 50% of inhibition rates of mycelial growth of at least one target pathogen. Especially, LFF of Evernia prunastri, Lecania hyalina and Lecanora argentata were remarkably effective in inhibition of mycelial growth of all the tested pathogens with antibiotic mode of action. On the other hands, five isolates of Cladonia furcata, Hypogymnia physodes, Lasallia pustulata, Ramalina fastigiata and Ramalina pollinaria exhibited fungal lytic activity against all the three pathogens. Among the tested fungal pathogens, C. coccodes seemed to be most sensitive to the LFF. The Hungarian LFF firstly isolated in this study can be served as novel bioresources to develop new biofungicides alternative to current fungicides to control hot pepper anthracnose pathogenic fungi.

Leptosphaerulina trifolii에 의한 Kentucky Bluegrass의 Leptosphaerulina 잎마름병 발생 (Occurrence of Leptosphaerulina Leaf Blight on Kentucky Bluegrass Caused by Leptosphaerulina trifolii)

  • 김정호;심규열;김영호
    • 식물병연구
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    • 제16권1호
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    • pp.94-96
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    • 2010
  • In May of 2004 through 2007, Leptosphaerulina leaf blight caused by Leptosphaerulina trifolii occurred on Kentucky bluegrass (Poa pratensis) at golf courses in Gangwon Province, Korea. Symptoms on the turfgrass caused by L. trifolii were leaf blights, dying from the leaf tip downwards to the crown, which appeared patches in the field because of local pockets of severely infected (blighted) grass. Perithecia were produced on old or weak leaves, including club-shaped asci, each of which contained 8 pale brown muriform ascospores with cross and longitudinal septa. Ascospores of the fungus isolated from the diseased leaf tissue and cultured on potato-dextrose agar (PDA) were muriform multicellular (composed of 3-6 cells) and $23.4-40.5{\times}7.8-15.6{\mu}m$ in size with 3-4 transverse and 0-3 longitudinal septa, which were morphologically identical to L. trifolii reported previously. DNA sequences of ribosomal RNA gene (internal transcribed spacer) of the fungus were homologous with similarity of 99% to those of L. trifolii isolates in GenBank database, confirming the identity of the causal agent of the disease. Pathogenicity of the fungus was also confirmed on the creeping bentgrass by Koch's postulates. This is first report of Leptosphaerulina leaf blight on turfgrass caused by L. trifolii in Korea.

표고골목을 가해하는 주홍꼬리버섯의 완전세대 변화 및 2차 오염 해균상 (Changes of Teleomorph of Diatrype stigma Damaging Bed-log of Shiitake and Secondary Harmful Fungi)

  • 박원철;이봉훈;김세권
    • 한국균학회지
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    • 제31권2호
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    • pp.53-58
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    • 2003
  • 1999년 12월부터 2001년 8월까지 주홍꼬리버섯 완전세대 형성 이후의 변화와 2차적으로 침입하는 다른 오염해 균을 조사하였다. 주홍꼬리버섯 자좌의 표면 색은 12개월 후 모두 적갈색에서 흑갈색으로 변하였다. 공구는 시간이 경과함에 따라 완전세대형성 초기보다 크기가 작아지고 단위면적당 갯수가 적어지다가 20개월 후에는 대부분의 시험골목에서 사라졌다. 자낭각과 자낭포자도 자좌 표면의 색 변화와 공구의 유무에 의해 반드시 영향을 받는 것은 아니었지만, 종균접종 이듬해 4월부터 서서히 없어지다가 20개월 후에는 시험골목 중 10% 정도에서만 포자를 갖는 자낭각이 발견되었다. 주홍꼬리버섯에 오염된 표고골목에 2차적으로 발생하는 다른 종류의 해균조사 결과, 검은혹버섯, Nodulisporium sp., 치마버섯, Trichoderma spp. 등이 주홍꼬리버섯 자좌 위에서 발견되었고 Penicillum sp.은 주홍꼬리버섯 포자 퇴 위에서 발견되었다. 이밖에 Hypoxylon howeianum, Enteridium lycoperdon, Fuligo sp., Physaurm umbiliciferum, Stemonitis fusca 등 4종의 점균류가 관찰되었다. 또한, 종균접종 이듬해 4월부터 일부 골목에서 주홍꼬리 버섯의 불완전세대(Libertella sp.)가 다시 발생하였다.