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Mycoparasitism of Acremonium strictum BCP on Botrytis cinerea, the Gray Mold Pathogen
( Gyung Ja Choi ),( Jin Cheol Kim ),( Kyoung Soo Jang ),( Kwang Yun Cho ),( Heung Tae Kim ) 한국미생물 · 생명공학회 2008 Journal of microbiology and biotechnology Vol.18 No.1
A fungal strain BCP, which parasitizes Botrytis cinerea gray mold pathogen, was isolated and identified as Acremonium strictum. BCP strain overgrew the colonies of B. cinerea and caused severe lysis of the host hyphae. Frequent penetration and hyphal growth of A. strictum BCP inside the mycelia of B. cinerea were observed under light microscopy. In addition, some morphological abnormalities such as granulation and vacuolation of the cytoplasm were observed in mycelia and spores of B. cinerea. In dual culture test, A. strictum BCP strongly inhibited the mycelial growth of several plant pathogenic fungi as well as B. cinerea. To our knowledge, this is the first report on mycoparasitism of Acremonium species on B. cinerea.
Plant Growth-promoting Activity of Acremonium strictum MJN1 Isolated from Roots of Panax ginseng
Lim, Hyung-Bum,Chung, Yang-Jo,Bae, Ju-Yun,Kim, Dong-Jin,Kwon, Hyung-Jin,Lee, In Hyung,Chung, Byung-Chul,Lee, Woong-Sang,Suh, Joo-Won 한국응용생명화학회 2000 Journal of Applied Biological Chemistry (J. Appl. Vol.43 No.2
The plant growth-promoting activity of Acremonium strictum MJN1 isolated from roots of Panox ginseng was explored. The myceliaI extract of A. strictum MJN1 enhanced the rice seedling growth by 14.5 and 9.0% in the dried weight of shoots and roots, and the growth of red pepper by 54 and 85% in the top length and the dried weight in pot experiments, respectively. The plant growth-promoting substances in the myceliaI extract of Acremonium strictum MJN1 were identified as D-adenosine and glycerol. Both commercial D-adenosine and glycerol also promoted significantly the rice seedling growth but, unlike the mycelial extract of A. strictum MJN1, hardly affected the yields of plants grown in pots or field. Therefore, it is possible that other plant growth-promoting substances are produced by A. strictum MJN1. However, this study shows that A. strictum MJN1 has a great potential as a biofertilizer.
Biocontrol Activity of Acremonium strictum BCP Against Botrytis Diseases
Choi, Gyung-Ja,Kim, Jin-Cheol,Jang, Kyoung-Soo,Nam, Myeong-Hyeon,Lee, Seon-Woo,Kim, Heung-Tae The Korean Society of Plant Pathology 2009 Plant Pathology Journal Vol.25 No.2
Biological control activity of Acremonium strictum BCP, a mycoparasite on Botrytis cinerea, was examined against six plant diseases such as rice blast, rice sheath blight, cucumber gray mold, tomato late blight, wheat leaf rust, and barley powdery mildew in growth chambers. The spore suspension of strain BCP showed strong control activities against five plant diseases except against wheat leaf rust. On the other hand, the culture filtrate of A. strictum BCP was effective in controlling only cucumber gray mold and barley powdery mildew. Further in vivo biocontrol activities of A. strictum BCP against tomato gray mold were investigated under greenhouse conditions. Control efficacy of the fungus on tomato gray mold increased in a concentration-dependent manner. Treatment of more than $1{\times}10^6$ spores/ml significantly controlled the disease both in tomato seedlings and in adult plants. The high disease control activity was obtained from protective application of the strain BCP, whereas the curative application did not control the disease. Foliar infections of B. cinerea were controlled with $1{\times}10^8$ spores/ml of A. strictum BCP applied up to 7 days before inoculation. In a commercial greenhouse, application of A. strictum BCP exhibited the similar control efficacy with fungicide procymidone (recommended rate, $500{\mu}g/ml$) against strawberry gray mold. These results indicate that A. strictum BCP could be developed as a biofungicide for Botrytis diseases under greenhouse conditions.
Biocontrol Activity of Acremonium strictum BCP Against Botrytis Diseases
최경자,김진철,장경수,남명현,이선우,김흥태 한국식물병리학회 2009 Plant Pathology Journal Vol.25 No.2
Biological control activity of Acremonium strictum BCP, a mycoparasite on Botrytis cinerea, was examined against six plant diseases such as rice blast, rice sheath blight, cucumber gray mold, tomato late blight, wheat leaf rust, and barley powdery mildew in growth chambers. The spore suspension of strain BCP showed strong control activities against five plant diseases except against wheat leaf rust. On the other hand, the culture filtrate of A. strictum BCP was effective in controlling only cucumber gray mold and barley powdery mildew. Further in vivo biocontrol activities of A. strictum BCP against tomato gray mold were investigated under greenhouse conditions. Control efficacy of the fungus on tomato gray mold increased in a concentration-dependent manner. Treatment of more than 1×106 spores/ml significantly controlled the disease both in tomato seedlings and in adult plants. The high disease control activity was obtained from protective application of the strain BCP, whereas the curative application did not control the disease. Foliar infections of B. cinerea were controlled with 1×108 spores/ml of A. strictum BCP applied up to 7 days before inoculation. In a commercial greenhouse, application of A. strictum BCP exhibited the similar control efficacy with fungicide procymidone (recommended rate, 500 μg/ml) against strawberry gray mold. These results indicate that A. strictum BCP could be developed as a biofungicide for Botrytis diseases under greenhouse conditions.
Verlamelin, an Antifungal Compound Produced by a Mycoparasite, Acremonium strictum
Kim, Jin-Cheol,Park, Gyung-Ja,Kim, Hyun-Ju,Kim, Heung-Tae,Ahn, Jong-Woong,Cho, Kwang-Yun The Korean Society of Plant Pathology 2002 Plant Pathology Journal Vol.18 No.2
A strain of Acremonium strictum, the mycoparasite of Botrytis cinerea, showed strong antifungal activities both in vitro and in vivo against several phytopathogenic fungi. An antifungal substance was purified from the liquid cultures of A. strictum and identified as verlamelin by instrumental analyses. Verlamelin exhibited in vitro antifungal activity against some phytopathogenic fungi such as Magnaporthe grisea, Bipolaris maydis, and Botrytis cinerea, while it was net active against all the bacteria tested. In viva, verlamelin exhibited strong protective and curative activities, particularly against barley powdery mildew. At 100 μg/ml, it inhibited the development of barley powdery mildew with control values of more than 90% in 7-day protective and 2-day curative applications. This is the first report on the production of verlamelin by Acremonium species.
Verlamelin,an Antifungal Compound Produced by a Mycoparasite, Acremonium strictum
김진철,김형태,안종웅,조광윤,최경자,Hyun-JuKim 한국식물병리학회 2002 Plant Pathology Journal Vol.18 No.2
A strain of Acremonium strictum, the mycoparasite of Botrytis cinerea, showed strong antifungal activities both in vitro and in vivo against several phytopathogenic fungi. An antifungal substance was purified from the liquid cultures of A. strictum and identified as verlamelin by instrumental analyses. Verlamelin exhibited in vitro antifungal activity against some phytopathogenic fungi such as Magnaporthe grisea, Bipolaris maydis, and Botrytis cinerea, while it was not active against all the bacteria tested. In vivo, verlamelin exhibited strong protective and curative activities, particularly against barley powdery mildew. At 100 mg/ml, it inhibited the development of barley powdery mildew with control values of more than 90% in 7-day protective and 2-day curative applications. This is the first report on the production of verlamelin by Acremonium species.
Identification of FM001 as Plant Growth-Promoting Substance from Acremonium strictum MJN1 Culture
JUNG, JAE-HAN,SHIN, DONG-MIN,BAE, WOO-CHUL,HONG, SOON-KWANG,SUH, JOO-WON,KOO, SANGHO,JEONG, BYEONG-CHUL 한국미생물 · 생명공학회 2002 Journal of microbiology and biotechnology Vol.12 No.2
A plant growth-promoting substance, FM001, was isolated from the culture broth of Acremonium strictum MJN1. The purification steps included solvent extraction, adsorption chromatography using Diaion HP20, TLC on silica, and HLPC using a C-18 column. The purified FM001 enhanced rice seedling growth by 11.1% and 34.0% of the dried weight of the shoots and roots, and also radish growth by 26.5% and 23.7% of the top length and dried weight. FM001 also significantly promoted the growth of red pepper by increasing 32.7% of fruit weight and 11.3% as regards the height. FM001 consisted of C, H, 0, N, and S, and its molecular weight was determined to be 537.78 Da. The structure of FM001 resembled brassinosteriods, and it would appear to have great potential as an effective bio-fertilizer.