Abstract
지자체 농업기술센터와 농과원에서 수집한 18개의 Bacillus subtilis 균주들이 보유하고 있는 기능성을 구명하기 위하여 항균활성을 비롯한 사이데로포아 생산, 질소고정능력, 인산가용화 능력 및 오옥신 생성능력을 조사하였다. B. subtilis 균주들은 대부분 입고병균(R. solani), 고추 탄저병균(C. acutatum), 채소류 시들음병균(F. oxysporum), 벼도열병균(M. oryzae), 고추 역병균(P. capsici)에 대하여 항균활성을 보였다. 대부분의 균주가 Siderophore와 오옥신 생성능력을 보였으며 질소고정능력도 함께 보유하고 있는 것으로 나타났다. 인산가용화능은 조사한 Bacillus 속 균주 중 단 한 균주에서 활성을 보였다. 대부분의 B. subtilis 균주가 고추 흰가루병 억제효과를 보였으나, 균주 간에는 방제효과에 있어서 큰 차이를 보이지 않았다. B. subtilis R2-1균주의 농업현장에서의 활용 가능성을 구명하기 위하여 2009년도에 강원도 화천의 유기재배농가에서 오이 흰가루병 방제용 미생물 농약으로 등록되어 사용되고 있는 '큐펙트'와 '탑시드'를 대조로 하여 방제효과를 검정하였다. 2009년도에 B. subtilis R2-1 처리시 방제효과는 37.7%로 '탑시드'(47.6%)보다는 낮았으나, '큐펙트'(25.7%)에 비해서는 높았다. 2010년도에는 B. subtilis R2-1의 고추 흰가루병 방제효과가 83.3%로 미생물 농약인 탑시드 보다도 높게 나타났다. B. subtilis R2-1균주의 발병억제 기작을 구명하기 위하여 B. subtilis R2-1균주와 미생물 농약(탑시드, 큐펙트)을 경엽 처리한 후 포자발아율을 계수한 결과, 미생물 농약인 큐펙트는 97.9%, 탑시드는 94.7% 억제하는데 비해서 B. subtilis R2-1균주는 84.2% 억제하는 것으로 나타났다. 앞으로 B. subtilis R2-1을 고농도로 배양할 수 있는 대량배양기술을 개발하고 항균활성 기능이 잘 발현되도록 제형화한다면 생물농약으로의 개발이 가능할 것으로 사료된다. The multi-function of 18 Bacillus subtilis isolates collected from agricultural extension centers of local government and National Academy of Agricultural Science was investigated by measuring their antifungal activities against five plant pathogens, such as Rhizoctonia solani, Colletotrichum acutatum, Fusarium oxysporum, Magnaporthe oryzae and Phytophthora capsici, phosphorus solubilization ability, production of indole acetic acid (IAA) and siderophore, and nitrogen fixation. The B. subtilis isolates showed antifungal activity against several plant pathogens and nitrogen fixation activity, and produced siderophore and IAA. They could control pepper powdery mildew (Leveillula taurica), but there was no difference in control efficacy among the B. subtilis isolates. In fields, the control efficacy of B. subtilis R2-1 ($10^8$ cells/ml) was compared with two microbial fungicides, Q-pect and Topsid. In 2009, the control efficacy of B. subtilis R2-1 (37.7%) was lower than that of Topsid (47.6%), but higher than that of Q-pect (25.7%). In 2010, the control efficacy of B. subtilis R2-1 (83.3%) was higher than that of Topsid (67.9%). In order to elucidate mode of action of B. subtilis R2-1 for controlling pepper powdery mildew, spore germination rates of pepper powdery mildew pathogen collected on treated leaves was investigated when suspensions of B. subtilis R2-1 and two microbial fungicides (Q-pect and Topsid) were foliar-sprayed. They highly suppressed spore germination of the pathogen with inhibition values of 84.2% for B. subtilis R2-1, 97.9% for Q-pect and 94.7% for Topsid. Further study on the mass-culturing method and formulation is needed for development of a microbial fungicide.
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Claims 12
Claim · model-written summary
B. subtilis isolates showed antifungal activity against several plant pathogens.
- Taxon
- Red Pepper
Capsicum annuum var. annuumt0 - Interactor
- plant pathogense0pathogen
- Outcome
- antifungal activity against several plant pathogense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. subtilis isolates showed antifungal activity against several plant pathogens and nitrogen fixation activity, and produced siderophore and IAA.”
t0“Red Pepper”
Claim · model-written summary
B. subtilis isolates had nitrogen fixation activity.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Interactor
- B. subtilis
Bacillus subtilise0biocontrol_agent - Outcome
- nitrogen fixation activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. subtilis isolates showed antifungal activity against several plant pathogens and nitrogen fixation activity, and produced siderophore and IAA.”
t0“Red Pepper”
Claim · model-written summary
B. subtilis isolates produced siderophore and IAA.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Interactor
- B. subtilisBacillus subtilise0biocontrol_agent
- Outcome
- produced siderophore and IAAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. subtilis isolates showed antifungal activity against several plant pathogens and nitrogen fixation activity, and produced siderophore and IAA.”
t0“Red Pepper”
Claim · model-written summary
B. subtilis isolates controlled pepper powdery mildew.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- B. subtilis isolatese0
- Interactor
- Leveillula tauricae0pathogen
- Outcome
- pepper powdery mildewe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They could control pepper powdery mildew (Leveillula taurica), but there was no difference in control efficacy among the B. subtilis isolates.”
t0“Red Pepper”
Claim · model-written summary
Control efficacy did not differ among B. subtilis isolates.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Interactor
- Leveillula tauricae0pathogen
- Outcome
- no difference in control efficacye0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They could control pepper powdery mildew (Leveillula taurica), but there was no difference in control efficacy among the B. subtilis isolates.”
t0“Red Pepper”
Claim · model-written summary
In 2009 R2-1 control efficacy was 37.7%, below Topsid at 47.6%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- B. subtilis R2-1e0
- Outcome
- control efficacye0
- Direction
- lowere0
- Value
- 37.7%e0
- Qualifier
- 47.6%e0
- Comparator
- Topside0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2009, the control efficacy of B. subtilis R2-1 (37.7%) was lower than that of Topsid (47.6%), but higher than that of Q-pect (25.7%).”
t0“Red Pepper”
Claim · model-written summary
In 2009 R2-1 control efficacy was 37.7%, above Q-pect at 25.7%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- B. subtilis R2-1e0
- Outcome
- control efficacye0
- Direction
- highere0
- Value
- 37.7%e0
- Qualifier
- 25.7%e0
- Comparator
- Q-pecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2009, the control efficacy of B. subtilis R2-1 (37.7%) was lower than that of Topsid (47.6%), but higher than that of Q-pect (25.7%).”
t0“Red Pepper”
Claim · model-written summary
In 2010 R2-1 efficacy was 83.3%, above Topsid at 67.9%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- B. subtilis R2-1e0
- Outcome
- control efficacye0
- Direction
- highere0
- Value
- 83.3%e0
- Qualifier
- 67.9%e0
- Comparator
- Topside0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2010, the control efficacy of B. subtilis R2-1 (83.3%) was higher than that of Topsid (67.9%).”
t0“Red Pepper”
Claim · model-written summary
R2-1 inhibited pathogen spore germination by 84.2%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- B. subtilis R2-1e0
- Outcome
- spore germination of the pathogene0
- Direction
- suppressede0
- Value
- 84.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They highly suppressed spore germination of the pathogen with inhibition values of 84.2% for B. subtilis R2-1, 97.9% for Q-pect and 94.7% for Topsid.”
t0“Red Pepper”
Claim · model-written summary
Q-pect inhibited pathogen spore germination by 97.9%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- Q-pecte0
- Outcome
- spore germination of the pathogene0
- Direction
- suppressede0
- Value
- 97.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They highly suppressed spore germination of the pathogen with inhibition values of 84.2% for B. subtilis R2-1, 97.9% for Q-pect and 94.7% for Topsid.”
t0“Red Pepper”
Claim · model-written summary
Topsid inhibited pathogen spore germination by 94.7%.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Treatment
- Topside0
- Outcome
- spore germination of the pathogene0
- Direction
- suppressede0
- Value
- 94.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They highly suppressed spore germination of the pathogen with inhibition values of 84.2% for B. subtilis R2-1, 97.9% for Q-pect and 94.7% for Topsid.”
t0“Red Pepper”
Claim · model-written summary
Further mass culture and formulation work is recommended for microbial fungicide development.
- Taxon
- Red PepperCapsicum annuum var. annuumt0
- Outcome
- Further study on the mass-culturing method and formulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further study on the mass-culturing method and formulation is needed for development of a microbial fungicide.”
t0“Red Pepper”
The same questions in other papers
Bacillus subtilis · disease · Capsicum annuum (sweet pepper)Results agree
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See all 8 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.