• 보존과학연구
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• 통권30호
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• pp.31-46
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• 2009

In the study, we confirmed morphological traits and calculated the Risk Class of 25 mould species, including Tyromyces palustris, through decomposition rate of substrate for characteristic confirmation of injured microorganisms. We received the injured microorganisms in wood and it was pure cultivated. We observed growth traits and decomposition rate of substrate. Also, it allows the calculation of Risk Class to be worried in the case of growth in wooden cultural properties. As a result, Tyromyces palustris, representative of brown-rot, has the characteristics about decomposition rate of substrate - Cellulose ; more active(+++), Lignin ; more active(+++), Xylan ; more active(+++), Starch ; active(++). We classified Tyromcyes palustris as a first Risk Class and as a second Risk Class about Schizophyllum commune et al(9 species, See table 1. We look forward to offering standard data base for evaluating Risk Class as a matter of applying preventive conservation in wooden cultural properties through our study.

• The Plant Pathology Journal
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• 제32권6호
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• pp.575-579
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• 2016

Burkholderia glumae (bacterial grain rot), Xanthomonas oryzae pv. oryzae (bacterial leaf blight), and Acidovorax avenae subsp. avenae (bacterial brown stripe) are major seedborne pathogens of rice. Based on the 16S and 23S rDNA sequences for A. avenae subsp. avenae and B. glumae, and transposase A gene sequence for X. oryzae pv. oryzae, three sets of primers had been designed to produce 402 bp for B. glumae, 490 bp for X. oryzae, and 290 bp for A. avenae subsp. avenae with the $63^{\circ}C$ as an optimum annealing temperature. Samples collected from naturally infected fields were detected with two bacteria, B. glumae and A. avenae subsp. avenae but X. oryzae pv. oryzae was not detected. This assay can be used to identify pathogens directly from infected seeds, and will be an effective tool for the identification of the three pathogens in rice plants.

• Journal of the Korean Wood Science and Technology
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• 제45권2호
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• pp.195-201
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• 2017

This study was conducted to evaluate the resistance of heat-treated wood using the catalyst to decay caused by fungi for sapwood and heartwood of two tree species, Korean red pine (Pinus densiflora) and Japanese larch (Larix kaempferi), respectively. Wood samples were immersed for 10 min in sulfuric acid (7.5%) and then heat-treated at $130^{\circ}C$ for 90 min. Fomitopsis palustris, a brown-rot fungus, was used to examine the decay resistance of Korean red pine and Japanese larch wood. Weight and density of wood from the all conditions increased after heat treatment using the catalyst. Weight loss after decay resistance test was also dropped with a heat treatment. The lowest weight loss indicated at heat-treated heartwood of Japanese larch. Heat treatment using the catalyst effectively increased the resistance of wood to decay caused by fungi.

• The Plant Pathology Journal
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• 제17권2호
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• pp.101-105
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• 2001

A disease survey on the carnation (Dianthus caryophyllus L.) wilt was conducted during the high temperature period (June through August) and the low temperature period (February through May) in 58 greenhouses of its major cultivation areas, including Pusan, Kimhae, and Changwon in Korea from 1998 to 1999. The disease incidence was averaged 5.4% and 11.9% in the low and high temperature periods, respectively. Severe damage was found in summer with high incidences of around 50% in some greenhouses. Close examination of the symptoms and isolation of the causal agent revealed that there was a new disease different from Fusarium wilt caused by Fusarium oxysporum f. sp. dianthi, which was determined as the stub dieback caused by F. was cetermined as the stub dieback caused by F. graminearum (teleomorph : Gibberella zeae). The stub dieback symptoms involved brown rot of stem that started usually from the portion of cutting without discoloration of inner vascular tissues. Seven out of 38 isolates from the wilted plants were identified as F. graminearum, while the others as F. oxysporum f. sp. dianthi. Mycological characteristics of the stub dieback pathogen including colony color, absence of microconidia, and the shape of macroconidia, were consistent with F. graminearum previously described. This is the first report of the carnation stub dieback in Korea.

• Mycobiology
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• 제49권2호
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• pp.173-182
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• 2021

Recently, Cryptococcus pseudolongus has been reported as a new pathogen of shiitake (Lentinula edodes). However, its pathological properties are not much known. To further understand its impact on the mushroom, we investigated the pathogen's interactions with the mycelium of shiitake, histopathological properties, host range, and sensitivity to diverse antifungal agents. The strain C. pseudolongus DUCC 4014 inhibited the mycelial growth of L. edodes strain (cultivar Sanjo 701ho) and caused browning in the mycelia confronted with the yeast on PDA. Spray inoculation of the yeast caused an abnormal browning symptom on the cap and/or gills of three shiitake cultivars grown on sawdust media in vinyl bags. Scanning electron microscopic images of the abnormally browned parts of shiitake fruit body illustrated that mushroom tissues were loosed and dispersed in the middle and edge of the cap and the arrangement of basidiospores borne on basidia in the gills was disturbed compared to those of normal shiitake fruit body. Spray inoculation also led to developing abnormal browning on the harvested fruit body, indicating C. pseudolongus could be a problem during mushroom storage. But the yeast was not able to induce abnormal browning on mushrooms of Pleurotus ferulae, Pleurotus fostreatus, and Agaricus bisporus. But it induced browning only on button mushroom (A. bisporus) when they were inoculated after wounding. Tests with 16 kinds of fungicides revealed that the cell growth of C. pseudolongus could be inhibited by benzalkonium chloride at MIC 7 ㎍/ml and benomyl at MIC 3 ㎍/ml.

• Journal of the Korean Wood Science and Technology
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• 제51권1호
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• pp.49-57
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• 2023

This research aimed to evaluate the durability of Samama (Anthocephalus macrophyllus) wood treated with boron preservatives, citric acid (CA), and heating against termites. Wood samples were impregnated firstly with 5% boron solutions, such as boric acid, borax and boric acid + borax combination at 1:1 (w/w). The second impregnation used 5% CA. The impregnations were conducted in a pressure tank at 7 kg/cm² for 4 hours. After impregnation, the samples were heat treated at 80℃ or 160℃. All the treated and control samples were exposed to decay fungi, drywood termites and subterranean termites based on SNI 7207:2014 standard. The results showed that boron preservatives reduced fungal attacks on Samama wood. The combination treatment of boric acid, CA and heat treatment at 160℃ was also effective to increase the resistance of Samama wood against white- and brown rot fungi, and drywood termites. Heat treatment consistently improved the resistance of Samama wood from decay fungi.

• 한국토양비료학회지
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• 제3권1호
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• pp.11-16
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• 1970

추락(秋落)에 $SiO_2$와 Mn을 시용(施用)하고 K를 시용(施用)치 않으면 수도(水稻)의 생육(生育)이 조해(阻害)되며 분얼 수가 현저히 감소 된다. K를 시용(施用)치 않은 수도(水稻)는 엽(葉)에 작은 적갈색(赤褐色)의 반점(斑點)이 발생(發生)하였고 엽색(葉色)은 농록색(濃綠色)이 였다. 간장(稈長)은 건전도(健全稻)보다 짧으나 출수(出穗)는 건전도(健全稻)보다 빨렀다. K를 시용(施用)한 수도(水稻)의 근(根)은 굴고, 길고 새뿌리가 나오나 K를 시용(施用)치 않은 수도(水稻)의 근(根)은 생육(生育)이 불량(不良)하고, 가늘고 근부(根腐)가 심(甚)하였다. K를 시용(施用)치 않은 수도(水稻)의 근부현상(根腐現狀)은 "농림육호(農林六號)"보다 "진흥(振興)"이 더 심(甚)하였다. K를 시용(施用)치 않은 수도(水稻)의 생육(生育)은 불량(不良)하나 N, P, $SiO_2$, Fe 및 Mn 함량(含量)은 K를 시용(施用)한 수도(水稻)보다 높다. 추락도(秋落稻)의 Fe 함량(含量)은 $Mn+SiO_2$의 시용(施用)으로 현저히 감소되나 K의 시용(施用)으로도 감소된다. 따라서 $Mn+SiO_2$를 시용(施用)한 무가리(無加里)의 추락답(秋落畓)에 생육(生育)한 수도(水稻)의 근부(根腐)는 K 결핍(缺乏) 때문이며 $Mn+SiO_2$나 K의 시용(施用)은 추락도(秋落稻)의 Fe 함량(含量)을 감소시킨다.

• 원예과학기술지
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• 제19권1호
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• pp.66-70
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• 2001

'만수' 품종은 농촌진흥청 원예연구소에서 1995년에 육성한 대과 고품질 저장력 강한 만생종 배 신품종이다. 이 품종은 1978년에 '단배'에 '만삼길'을 교배하여 얻은 교배실생 가운데 '78-26-46'이 대과 고감미 육질유연한 계통으로 유망하여 1989년에 1차 선발되었다. 1992년부터 '원교 나-15호'로 4년간 9개 지역에서 지역적응시험을 거쳐 최종 선발 명명되었다. '만수'는 수세가 강하고 직립형이며, 꽃눈 유지가 쉬워 '단배'나 '만삼길'보다 수량성이 높다. 개화 시기는 '신고'보다 1일 늦고 '신고', '장십랑' 및 기타 주요 재배품종과 교배친화성이다. '만수'의 숙기는 수원에서 10월 하순이다. 과실모양은 편원형이고 과피색은 담황갈색이며 과중은 600-700g, 당도 $12-13^{\circ}Bx$이다. 육질은 부드럽고 과즙이 풍부하며 석세포가 적다. 이 품종은 검은무늬병에 저항성이다.

• 한국균학회지
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• 제41권1호
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• pp.38-41
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• 2013

무화과 잿빛곰팡이병은 2010년부터 2011년에 아열대작목을 시범적으로 재배하고 있는 전북 농업기술원 하우스 포장에서 발병하였다. 잿빛곰팡이병은 11월경의 저온상태에서 발병이 심하였으며, 병원균은 갈색의 일부분으로 시작하여 점차 진전되어 후기에는 과실 전체가 잿빛곰팡이로 뒤덮였다. 잿빛곰팡이로 뒤덮인 과실은 갈색 솜털을 덮고 있는 모양이었으며, 육안으로도 곰팡이 포자를 쉽게 관찰할 수 있었다. 병원균에 감염된 과실은 처음에 갈색~암 갈색 수침상으로 부패하기 시작하였고, 잿빛곰팡이균사와 포자가 밀생하였다. 무화과 잿빛곰팡이병의 분생포자는 구형으로 $7.3-14.6{\times}6.8-11.1{\mu}m$이며, 무색으로 단세포이었다. 또한 수지상으로 분지한 분생자경위에 무수히 형성 하였다. 분생자경의 크기는 $15-33{\times}2{\mu}m$이며, 갈색 또는 투명한 색을 띄고 있었다. rDNA ITS 영역의 염기서열 분석결과 무화과 잿빛곰팡이병을 일으키는 병원균은 Botrytis cinerea로 등록된 GenBank accession number HQ171052, EU519210, HQ171053, FN812726, HM849615, EU563120 과 100% 일치하는 것으로 나타났다. 또한 Botrytis spp. 종간 비교에서도 B. cinerea와 같은 clade에 속함을 확인할 수 있었으며, 다른 group과는 57%의 similarity를 보였다. 따라서 무화과 잿빛곰팡이병을 일으키는 병원균을 분리배양하여 균학적 특성과 rDNA ITS영역의 염기서열을 분석한 결과 이미 보고된 B. cinerea와 일치하였다.

• 한국자원식물학회지
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• 제25권2호
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• pp.293-297
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• 2012

절화용 아시아틱나리 신품종 '포인트(Point)' 품종은 2000년에 자생 하늘나리를 모본으로 하고 교잡계통중 주황색계통인 97-5계통을 부본으로 하여 교배하였다. 2005년~2008년까지 대관령에서 여름 시설재배를 통하여 생육 및 개화특성을 검정한 후 최종적으로 선발하여 '포인트(Point)'로 명명하였다. '포인트(Point)' 품종은 화색이 적색의 꽃봉오리를 지닌 오랜지 적색(O-R N30C)의 꽃이며 중심부로 반점이 있다. 암술은 갈색이고 수술은 진갈색이다. 개화기는 7월 8일이며 초장은 88.2 cm, 절화당 꽃수는 5.4개로 많다. 내화피장은 6.3 cm, 내화피폭이 3.2 cm로 대조품종 플라토보다 작은 꽃이다. 엽수는 12.2개이며 잎의 크기는 엽장이 9.2 cm, 엽폭이 1.1 cm로 좁고 짧았다. 구근무게는 24.6 g, 구주는 11.6 cm이다. 병에 대한 저항성은 강하며 개화기간은 16.1일로 길었고 기호도에 있어서도 4.1로 좋은 반응을 보였다.