• 제목/요약/키워드: inoculation study

검색결과 967건 처리시간 0.031초

Improvement of K+ and Na+ Ion homeostasis and salt tolerance by Co-inoculation of arbuscular mycorrhizal fungi (AMF) and spore associated bacteria (SAB)

  • Selvakumar, Gopal;Kim, Kiyoon;Roy, C. Aritra;Jeon, Sunyong;Sa, Tongmin
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.246-246
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    • 2017
  • Salinity inhibits plant growth and restricts the efficiency of arbuscular mycorrhizal fungi. The selective uptake of nutrients from the soil and their effective transport to host roots make it essential for plant growth and development under salt stress. AMF spore associated bacteria shown to improve mycorrhizal efficiency under stress. Thus, this study aimed to understand the co-inoculation efficiency of AMF and SAB on maize growth and ion homeostasis under salt stress. Two AMF strains and one SAB were inoculated with maize either alone or in combination with one another. The results of our study showed that AMF and SAB co-inoculation significantly improved dry weight and nutrient uptake of maize under salt stress. Co-inoculation significantly reduced proline accumulation in shoots and Na+ accumulation in roots. Co-inoculation treatment also exhibited the high K+/Na+ ratios in roots at 25 mM NaCl. Mycorrhizal colonization showed positive influence for regulation of ZmAKT2, ZmSOS1 and ZmSKOR gene expressions, contributing to K+ and Na+ ion homeostasis. CLSM view showed that SAB were able move and localize into inter and intra cellular spaces of maize roots. In addition, CLSM view of AMF spores showed that gfp-tagged SAB also associated on the spore outer hyaline layer.

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Evaluation of Yeast Diversity During Wine Fermentations with Direct Inoculation and pied de cuve Method at an Industrial Scale

  • Li, Erhu;Liu, Chuanhe;Liu, Yanlin
    • Journal of Microbiology and Biotechnology
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    • 제22권7호
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    • pp.960-966
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    • 2012
  • The diversity and composition of yeast populations may greatly impact wine quality. This study investigated the yeast microbiota in two different types of wine fermentations: direct inoculation of a commercial starter versus pied de cuve method at an industrial scale. The pied de cuve fermentation entailed growth of the commercial inoculum used in the direct inoculation fermentation for further inoculation of additional fermentations. Yeast isolates were collected from different stages of wine fermentation and identified to the species level using Wallersterin Laboratory nutrient (WLN) agar followed by analysis of the 26S rDNA D1/D2 domain. Genetic characteristics of the Saccharomyces cerevisiae strains were assessed by a rapid PCR-based method, relying on the amplification of interdelta sequences. A total of 412 yeast colonies were obtained from all fermentations and eight different WL morphotypes were observed. Non-Saccharomyces yeast mainly appeared in the grape must and at the early stages of wine fermentation. S. cerevisiae was the dominant yeast species using both fermentation techniques. Seven distinguishing interdelta sequence patterns were found among S. cerevisiae strains, and the inoculated commercial starter, AWRI 796, dominated all stages in both direct inoculation and pied de cuve fermentations. This study revealed that S. cerevisiae was the dominant species and an inoculated starter could dominate fermentations with the pied de cuve method under controlled conditions.

복령의 인공 재배법 개선과 항산화활성에 관한 연구 (Studies on Improvement of Artificial Cultivation and Antioxidative Activity of Poria cocos)

  • 강안석;강태수;손형락;서상명;강미선;김광포;이정숙
    • 한국균학회지
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    • 제27권6호
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    • pp.378-382
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    • 1999
  • 복령의 인공재배기술을 개선하고 복령추출물의 생리활성을 검토하고자 본 연구를 수행하였다. 종균의 종류 및 접종법에 따른 검토결과, 종목 양면접종법이 균핵형성정도, 균핵 갯수, 균핵 생산수율 및 개당 평균 중량에서 가장 좋았으며, 톱밥 양면접종법이 균핵형성 및 생성수율에서 가장 낮았다 복령의 품질과 생산성을 종합하여 판단할 때, 최적 종균 및 접종방법은 종목 양면접종 > 종목 절단면접종 > 균핵 양면접종 > 톱밥 양면접종의 순이었다. 복령균핵으로부터 분리한 생리활성물질인 조 복령당의 함량은 83%이었고, 농도가 증가함에 따라 상대점도가 상승하였으며, 염의 첨가 농도에는 큰 영향을 받지 않았다. 항산화 활성(EDA, POV, TBA)을 측정한 결과, TBA가의 경우에는 천연 항산화제인 비타민 E와 유사한 활성을 나타내었으나, POV와 EDA에 의한 항산화활성 측정 결과에서는 BHT나 비타민 C보다 낮은 활성을 나타내었다.

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수박 덩굴쪼김병에 대한 간편 저항성 검정법 확립 (Development of a Simple and Effective Bioassay Method to Evaluate Resistance of Watermelon Plants to Fusarium oxysporum f. sp. niveum)

  • 조은주;최용호;장경수;김헌;최경자
    • 식물병연구
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    • 제23권2호
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    • pp.168-176
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    • 2017
  • Fusarium oxysporum f. sp. niveum에 의해 발생하는 수박의 덩굴쪼김병 저항성을 검정하기 위해 뿌리 침지 접종 방법이 많이 사용되어 왔다. 이 방법은 정확한 저항성 검정 결과를 제공하나 많은 노동력과 시간이 소요되어 보다 빠르고 효율적인 검정 방법이 요구되어 왔다. 본 연구에서 수박 덩굴쪼김병의 간편한 대량 저항성 검정법을 확립하기 위해 저항성 및 감수성 4개 품종의 유묘에 F. oxysporum f. sp. niveum을 네 가지 접종 방법(뿌리 침지, scalpel, tip 및 무상처 토양 관주법)으로 접종하고 덩굴쪼김병 발생을 조사하였다. 이들 중 scalpel 접종 방법은 실험 방법이 간단하고 정확한 저항성 반응을 보였다. 우리는 scalpel 접종 방법을 이용하여 수박의 생육 시기, 접종원 농도 및 접종 후 재배 온도 등의 발병 조건에 따른 위의 품종들의 덩굴쪼김병에 대한 저항성 반응을 조사하였다. 그리고 이들 결과로부터 확립한 scalpel 방법의 효용성은 시판 품종 23개의 덩굴쪼김병균에 대한 저항성 정도를 뿌리침지 방법과 비교하여 확인하였다. 이상의 결과를 종합하여 수박 덩굴쪼김병에 대한 간편 대량 저항성 검정 방법으로 수박 종자를 파종하여 온실에서 10-13일 동안 재배한 수박 유묘의 뿌리를 scalpel을 이용하여 상처를 준 후에 $3.0{\times}10^6\;conidia/ml$의 포자현탁액을 포트당 10 ml씩 관주하고 $25^{\circ}C$에서 하루에 12시간씩 광을 조사하면서 약 4주 동안 재배하는 것을 제안하고자 한다.

BALB/c 마우스에서 큰리슈만편모충의 감염부위에 따른 궤양형성과 혈청 면역반응 (Skin ulcer and immunoblot patterns by inoculation sites in BALB/c mice infected with Leishmania major)

  • 이미정;이종국
    • Parasites, Hosts and Diseases
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    • 제35권1호
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    • pp.31-38
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    • 1997
  • BALB/c 마우스에서 감염부위와 감염기간에 따른 숙주 체액 면역반응의 변화를 알아보고자 하였다. 배양한 큰리슈만편모충의 전편모형(promastigote)을 BALB/c 마우스의 코. 등 발바닥 부위로 나누어 각각 $3{\;}{\times}{\;}10^6$마리씩 피하 감염 후 10-100일 동안에 궤양의 형성과정을 관찰하고 채혈하여 SDS-PAGE와 면역이적법을 시행하여 각 부위별로 나타나는 항체 반응을 관찰하였다. 외관상으로는 감염 15일부터 코에 감염시킨 마우스에서 먼저 궤양이 형성되기 시작하였고. 코에 궤양이 나타난 후 2-3일 뒤에 발에서 궤양이 형성되었으며 등에서는 감염시킨 후 90일이 되어서야 궤양이 관찰되었다. 감염후 20일에 실시한 면역이적법에 의하면 코 감염군에서는 202, 139, 98, 83, 81, 67, 65, 62, 59, 54, 52, 42, 26, 23 kDa의 항원성 분획이 관찰되었고 발 감염군에서의 항원 분획양상도 코 감염군과 같았으나 등감염군에서는 202, 83, 81, 65 kDa의 희미한 항원성 분획이 관찰되었다. 그러나 감염 후 90일이 경과한 등 감염군에서는 202, 83, 81, 74, 67, 65, 62, 59, 54, 52, 20, 17 kDa의 항원 분획이 관찰되었다 이상의 결과로부터 감염부위와 감염기간에 따라 큰리슈만편모충에 대한 혈청반응이 항원 분획에 따라 다르게 나타남을 관찰하였다. 이 차이는 세 감염부위의 온도차에 의한 결과일 가능성도 있으나 다른 부위에 감염될 경우 한 숙주 내에서도 다른 면역반응이 유발되어 나타날 수도 있다고 추측하였다. 특히 궤양 형성 시기와 혈청 내 67-52 kDa 분획에 대한 항체 출현 시기가 일치하는 것으로 보아 궤양 형성에 이 항체가 관여할 가능성이 있음을 시사한다.

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Effect of addition of lactic acid bacteria on quality of rye silage harvested at early heading stage

  • Kuppusamy, Palaniselvam;Choi, Ki-Choon;Srigopalram, Srisesharam;Ilavenil, Soundharrajan;Park, Hyung-Su;Jung, Jeong Sung
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.285-285
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    • 2017
  • This study is aimed to analyze the effect of lactic acid bacteria inoculants (LAB) on quality of rye silage fermentation, harvested at early heading stage. The nutritive values were similar between the control and LAB inoculated silages. The pH of rye silage in LAB inoculation significantly decreased as compared to control (p<0.05). In addition, the content of lactic acid in LAB inoculation significantly increased (p<0.05), but the content of acetic acid in LAB treatments decreased. In addition, lactic acid bacterial counts in LAB inoculation significantly increased as compared to control (p<0.05). Therefore, we suggest that rye silage could be improved by novel lactic acid inoculation.

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열처리 및 젖산균 접종이 김치의 품질에 미치는 영향 (The Effect of Blanching and Lactic Acid Bacterial Inoculation on the Quality of Kimchi)

  • 박희옥;김유경;윤선
    • 한국식품조리과학회지
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    • 제9권2호
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    • pp.61-66
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    • 1993
  • The object of this study was to investigate the effects of blanching and lactic acid bacterial inoculation on the quality of kimchi. The pHs of the group added Leuconostoc mesenteroides were rapidly decreased, and then kept almost steady states. However, the pHs of the groups added Bifidobacterium bifidum were gradually decreased. Blanching treatment reduced the number of viable cells. At the beginning of the fermentation, the total organic acid contents of the blanched groups were lower than those of the non-blanched groups, but later on they were higher. With fermentation, the contents of malic, citric and fumaric acid were decreased in the control group, but increased in the cultured groups and all blanched groups. The cutting forces of the blanched groups were higher than those of the non-blanched groups during the whole fermentation period. The inoculation of Leu. mesenteroides was effective on the preservation of ascorbic acid. Blanching and the inoculation of Leu. mesenteroides gave good effect on the sensory acceptability. The acceptability of the groups added Bifidobacterium bifidum was low in initial fermentation period, but increased during the late fermentation period.

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Histological Detection of Phytoalexin Scoparone from Heat-Treated and UV-Illuminated Lemon Fruits After Inoculation with Penicillium digitatum

  • Kim, Jong-Jin;Yehoshua, Shimshon-Ben
    • The Plant Pathology Journal
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    • 제17권5호
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    • pp.271-275
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    • 2001
  • Phytoalexin scoparone (6,7-dimethoxycoumarin) was induced in flavedo tissue of lemon fruit inoculated with Penicillium digitatum during heat treatment for 3 days at $36^{\circ}$. The compound was also induced in the flavedo tissue after UV illuminatiion. Induction of scoparone was deteected in the flavedo tissue by histological analysis. This fluorescent scoparone accumulated only on the 4-5 layers of cells adjacent to the inoculation site. Preinoculation with P. digitatum and subsequent heat-treatment induced resistance in the lemon fruit tissues after challenge-inoculation at the site of the first infection. the data obtained in the study suggest that lemon fruit acquired resistance against P. digitatum parallel with the scoparone production at the infection site.

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Kluyvera sp. CL2 처리시기가 포도 '캠벨얼리' 과실품질에 미치는 영향 (Influence the Fruit Quality of 'Campbell early' Grape according to Inoculation time of Kluyvera sp. CL2)

  • 이석호;송명규;김승덕;최원호;이윤상;홍성택;김현주
    • 한국유기농업학회지
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    • 제23권2호
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    • pp.291-299
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    • 2015
  • 본 연구에서는 인산가용화 균주인 Kluyvera sp. CL2 처리시기가 과실품질에 미치는 영향을 구명하고자 본 연구를 실시하였다. 토양의 화학성 변화는 경핵기 처리구에서 인산이 가장 많이 증가하였고, K, Ca, Mg도 증가됨을 알 수 있었으며, pH의 변화는 토양 완충능에 의하여 적었다. 인산가용화균 처리에 따른 수용성 인산의 변화는 처리 시부터 20일 까지 효과적이었으며, 과립연화기 처리구부터 인산가용화율이 좋았다. 또한 과립연화기 처리구에서 과방중과 당도가 증가됨을 알 수 있었다. 인산가용화 균주 처리구에서 안토시아닌, 명도, 적색도, 황색도가 경핵기와 과립연화기 처리구에서 유의성을 보였으며, 특히 적색도가 향상되어 착색증진 효과가 있었다. 결론적으로 과실특성과 과실품질을 모두 비교하였을 때 과립연화기에 인산가용화 균주를 투입하는 것이 수량성과 품질면에서 가장 효과적이라고 생각된다.

Effect of Azospirillum brasilense and Methylobacterium oryzae Inoculation on Growth of Red Pepper (Capsicum annuum L.)

  • Chung, Jong-Bae;Sa, Tong-Min
    • 한국토양비료학회지
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    • 제45권1호
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    • pp.59-65
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    • 2012
  • Plant growth-promoting effects of rhizobacterial inoculation obtained in pot experiments cannot always be dependably reproduced in fields. In this study, we investigated the effect of inoculation with Azospirillum brasilense and Methylobacterium oryzae, which have displayed growth promoting effects in several pot experiments, on growth and fruit yield of red pepper under field condition in a plastic-film house. Four rows spaced 90 cm apart were prepared after application of compost ($10Mg\;ha^{-1}$), and red pepper seedlings (Capsicum annum L., Nocgwang) were transplanted in each row with 40-cm space. Experimental treatments were consisted of A. brasilense CW903 inoculation, M. oryzae CBMB20 inoculation, and uninoculated control. Twelve plots, 10 plants per plot, were allotted to the three treatments with four replicates in a completely randomized design. At the time of transplanting, 50 mL of each inoculum ($1{\times}10^8cells\;mL^{-1}$) was introduced into root zone soil of each plant, and re-inoculated at 7 and 14 days after transplant. Plant growth and fruit yield were measured during the experiment. Both A. brasilense CW903 and M. oryzae CBMB20 could not promote growth of red pepper plants. All growth parameters measured were not significantly different among treatments. There were large variations in fruit yield recorded on plot basis, and no statistically significant differences were found among treatments. The failure to demonstrate the expected plant growth promoting effect of the inoculants is possibly due to various environmental factors, including weather and soil characteristics, reducing the possibility to express the potential of the inoculated bacterial strains.