• Title/Summary/Keyword: symbiosis.

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Isolations of the Orchid mycorrhizal Fungi from the Roots of the Korean native Orchids and Inoculations of the Isolates to Four different Orchids (한국 자생란에 난 균근균의 분리와 유묘난에 접종)

  • 이상선;오창호;백기엽;이태수
    • Korean Journal Plant Pathology
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    • v.14 no.5
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    • pp.536-542
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    • 1998
  • Ten isolates of the orchid mycorrhizal fungi were isolated from the roots of Korean native orchid plants (Cymbidium goeringii) which inhabitate mainly in southern and western areas of Korea. The growth rates and color of the isolates in potato dextrose agar (PDA) were various. Microscopic observations of the hyphae isolated were identified as Rhizoctonia repens and R. endophytica var endophytica or their related species. R. repens was isolated from the roots of the Korean native orchids, but R. endophytica var endophyica was only isolated from the roots of the commercial orchids introduced from foreign countries. Also, the polymorephic patterns of genomic DNA extracted from selected isolates were compared with those of DNA extracted from the orchid mycorrhizal fungi isolated previously and similar band patterns were observed among those isolates. Five isolates of R. repens were selected and cultured at the oatmeal agar for investigating their symbiosis with orchid plants. The symbiotic specificity between orchid plants and isolated orchid mycorrhizal fungi was observe by growing orchids about six months in the greenhouse. The symbiotic responses of the commercial orchid plants with selected isolates were quite different form different isolates due to the genetic variations.

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Induction of Symbiosis between Nostoc muscorum and Cultured Plant Cells II. Changes of nitrogen fixation ability and morphology by association of N. muscorum with cultured tobacco cells (Nostoc muscorum과 식물배양세포의 공생유도에 관한 연구 II. N. muscorum과 담배배양세포의 혼합배양에 따른 질소고정능과 형태적 변화)

  • 정현숙
    • Journal of Plant Biology
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    • v.30 no.4
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    • pp.257-266
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    • 1987
  • Investigation on the ability of nitrogen usage by N2-fixing Nostoc muscorum and cultured tobacco cells when they were associately cultured on nitrogen-free media was carried out. Also, effect of polyamines on the associated cultured condition was carried out. In addition, morphological changes of N. muscorum and cultured tobacco cells in associate culture were observed to detect the possibility of induction of nitrogen fixing ability on cultued plant cells. The activity of nitrogenase increased markedly when N. muscorum was grown exclusively on nitrogen-free media. When N. muscorum was cultured associately with cultured tobacco cells on nitrogen-free media containing polyamines, high activity was detected in 10-4 M spermine treated group. Investigation on the change of polyamine amounts showed two times increase in spermidine and eight times increase in spermine on a associate culture. These effects of associated culture were shown through morphological change such as dense loclization of N. muscorum around the cultured tobacco cells as well as inside the cells. These results indicate the viability of N. muscorum in cultured tobacco cells and possible induction of nitrogen fixation ability by symbiosis.

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Green Bonds Driving Sustainable Transition in Asian Economies: The Case of India

  • PRAKASH, Nisha;SETHI, Madhvi
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.1
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    • pp.723-732
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    • 2021
  • On September 25, 2015, 193 countries of the United Nations (UN) General Assembly, signed the 2030 Agenda to work towards attaining 17 Sustainable Development Goals (SDGs) and its associated 169 targets and 232 indicators. With one of the largest renewable energy programs, India is well-poised to be a role model for low-carbon transformation to other Asian countries. However, bridging the financing gap is critical to ensure that the country meets its SDG targets. Though the SDGs identified by the UN are broad-based and interdependent, for ease of analysis we have grouped them into five themes - people, planet, prosperity, peace, and partnership - based on existing UN models. This paper investigates the financing gap for 'green' projects linked to planet-related SDG targets in India. It builds an argument for utilizing green bonds as an instrument to bridge the gap. After establishing the potential of green bonds in raising the finance to meet India's planet-related SDG targets, we look at the current policy landscape and suggest recommendations for successful execution. The paper concludes that deepening of the corporate fixed income securities market and firming up guidelines in line with India's climate action plans are inevitable before green bonds can be considered a viable financing option.

Conceptual Principles of the Transformation of Industrial Parks into Eco-Industrial Ones in the Conditions of Sustainable Development

  • Shevchuk, Nataliia;Tulchynska, Svitlana;Severyn-Mrachkovska, Liudmyla;Pidlisna, Olena;Kryshtopa, Iryna
    • International Journal of Computer Science & Network Security
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    • v.21 no.12
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    • pp.349-355
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    • 2021
  • The article investigates the conceptual principles of transformation of industrial parks into eco-industrial ones in the conditions of sustainable development. It is substantiated that the concept of sustainable development in the transformation of industrial parks is to grow industry and jobs, modernize production and introduce innovative technologies, resource and energy efficiency, reduce greenhouse gas emissions and waste storage, social protection of local communities and create favorable infrastructure. It is determined that for the transformation of industrial parks, it is necessary to improve regulatory changes, introduce criteria for compliance of industrial parks and the importance of their consideration, ensure park management by the management company and create favorable incentives for industrial entry into industrial symbiosis. It is proved that industrial parks can be an incentive for industrial development and competitiveness of enterprises. The availability of talented human capital, attractive territories, minerals, energy and mineral resources, developed domestic market, agricultural potential, transport networks is becoming an attractive place for investment and development. Industrial parks need investment. Transformation into eco-industrial parks through the implementation of sustainable development goals opens additional opportunities for access to investment funds and contributes to the implementation of growth and prosperity strategies of the country.

Freedom of Religion, Sangsaeng, and Symbiosis in the Post-COVID Study of (New) Religions

  • Donald A. WESTBROOK
    • Journal of Daesoon Thought and the Religions of East Asia
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    • v.2 no.2
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    • pp.51-72
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    • 2023
  • This article explores the intersection of freedom of religion, sangsaeng, and symbiosis when considering the post-COVID study of religions, especially new religions. When it comes to the study of new and alternative religious groups, where there is more potential for misunderstanding and misinformation, it becomes all the more important-and indeed mutually beneficial, in the areas of religious liberty, religious freedom, and cross-cultural dialogue-to learn about a tradition by taking into account the spiritual life and practices of members themselves and their own sacred writings and practices. Daesoon Jinrihoe offers a case study of the importance of this principle and the notion of sangsaeng in particular is a fruitful utilitarian lens for thinking about how scholars, journalists, and others might approach the study of religion in our complex and global digital age of (mis) information. Daesoon Jinrihoe is also considered in light of Roy Wallis's typology of world-rejecting, world-affirming, and world-accommodating new religious movements. Open areas for sociological research are proposed and the nascent field of Daesoon studies is compared to some similar scholarly endeavors within NRM studies.

The Role of Small Airports in the Distribution and Logistics of Local Produce in India: A Proposal for Business Efficiency

  • Romy JUNEJA;Saurabh TIWARI;Prasoom DWIVEDI
    • Journal of Distribution Science
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    • v.22 no.6
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    • pp.69-81
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    • 2024
  • Purpose: Small airports are social and economic enablers and facilitate businesses and individuals. They contribute significantly to the distribution and logistics of the local produce - be it goods or services, thereby impacting the economy but have limited access to funds and poor management restricts their development. Despite the importance, small airports in small cities struggle financially as they are unable to earn profits and have higher operating costs. In other words, this is a paradoxical situation for small airports wherein, despite losses, the regional or national public authorities still finance such airports under socio-economic obligations. Therefore, this study aims to identify the critical success factors for improving small airports' performance and propose a business model. Research design, data and methodology: Using the qualitative research, interviews with 16 stakeholders from Guwahati, Tirupati, Bhubaneswar and Dehradun airports in india were examined. Results: The analysis reveals strategic planning and low cost, non-passenger services, and development of airport economic region as the main factors contributing towards small airports' success. Additionally, providing logistics to the local businesses and creating niche markets are suggested. Conclusions: Small airports, based on their services and the means of targeting customers, could select the relevant approach to improve their overall performance and improve profitability.

The Effect of Root Exudate and Chemotaxis on Host Recognition in Soybean-Bradyrhizobium Symbiosis (대두(大豆)-근류균(根瘤菌) 공생(共生)에서 뿌리분비물(分泌物)과 화학주성(化學走性)이 숙주인식(宿主認識)에 미치는 영향(影響))

  • Kang, Sang Jai;Park, Woo Churl
    • Current Research on Agriculture and Life Sciences
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    • v.11
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    • pp.121-132
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    • 1993
  • This study was carried out to research the effect of the chemotaxis of Bradyrhizobium japonicum KCTC 2422 and its mutant toward soybean root exudate and to elucidate the effect of the lectin of host specificity (Host Recognition) in soybean-Bradyrhizobium symbiosis. The results obtained were as follows: The homogeneities of the purified lectins from soybean and pea seed was ascertained chromatographically and electrophoretically. Gel electrophoresis of soybean lectin in the presence of sodium dodecyl sulfate appeared a single protein band, whereas pea lectin appeared two protein bands. Soybean lectin from 2 cultivars formed immunoprecipitin arcs at same position with anti-soybean lectin rabbit IgG, but pea lectin did not form immunoprecipitin lines with anti-soybean lectin rabbit IgG. Chemotactic responses of KCTC 2422, LPN-100 and LCR-101 toward proline in capillary assays were 3.1, 1.3 and 1.0-fold above background, respectively. The chemotactic responses of KCTC 2422, LPN-100, and LCR-101 toward Paldal crude root exudate in capillary assays were 3.5, 1.4 and 1.4-fold above background, respectively. The present work shows that B. japonicum and its mutants are capable of very different responses toward root exudate fraction. The chemotactic responses of KCTC 2422 was most with neutral fraction, least with anionic fraction and intermediate with cationic fraction. The nitrogenase activity of soybean nodule was shown in 15days after inoculation with LCR-101. However, we couldn't find out the nodules when soybean was inoculated with LPN-100. From these result we can suppose that the chemotaxis of Bradyrhizobium plays inportant the role of forming the nodule (host recognition) in the soybean-B. japonicum symbiosis.

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Genes Involved in Symbiotic Nitrogen Fixation (질소고정 공생관계 관련 유전자)

  • 안정선
    • Proceedings of the Botanical Society of Korea Conference
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    • 1987.07a
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    • pp.81-101
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    • 1987
  • In an attempt to revies the informations about genes involved in symbiotic nitrogen fixation, developmental processes in which host plant interact with microbe during nodule formation were introduced first. The structure, function and regulation of the genes discussed were mainly about microbial genes; those involved in the process of nodule formation (nod-genes) and of nitrogen fixation (nif-genes). Informations about the host genes involved in the symbiosis were discussed briefly.

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Ascophyllum nodosum and its symbionts: XI. The epiphyte Vertebrata lanosa performs better photosynthetically when attached to Ascophyllum than when alone

  • Garbary, David J.;Miller, Anthony G.;Scrosati, Ricardo A.
    • ALGAE
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    • v.29 no.4
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    • pp.321-331
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    • 2014
  • Vertebrata lanosa is an abundant and obligate red algal epiphyte of Ascophyllum nodosum that forms part of a complex and highly integrated symbiotic system that includes the ascomycete, Mycophycias ascophylli. As part of ongoing studies to resolve interactions among species in the symbiosis, we used pulse amplitude modulation fluorimetry of chlorophyll a fluorescence, from photosystem II (PSII), to measure the maximum quantum yield ($F_v/F_m$) of PSII [$QY(II)_{max}$] and relative photosynthetic electron transport rates (rETR), as a function of light intensity, in order to evaluate the photosynthetic capacity of the two algal symbionts in the field and in the laboratory under different treatments. Our primary question was 'Is the ecological integration of these species reflected in a corresponding physiological integration involving photosynthetic process?' In the laboratory we measured changes in $QY(II)_{max}$ in thalli of V. lanosa and A. nodosum over one week periods when maintained together in either attached or detached treatments or when maintained separated from each other. While the $QY(II)_{max}$ of PSII of A. nodosum remained high and showed no significant variation among treatments, V. lanosa showed decreasing performance in the following conditions: V. lanosa attached to A. nodosum, V. lanosa in the same culture, but not attached to A. nodosum, and V. lanosa alone. These results are consistent with observations in which rETR was reduced in V. lanosa maintained alone versus attached to A. nodosum. Values for $QY(II)_{max}$ in V. lanosa measured in the field in fully submerged thalli were similar to those measured in the laboratory when V. lanosa was attached to it obligate host A. nodosum. Our results provide evidence of a physiological association of the epiphyte and its host that reflects the known ecology.

Mouse mannose-binding lectin-A and ficolin-A inhibit lipopolysaccharide-mediated pro-inflammatory responses on mast cells

  • Ma, Ying Jie;Kang, Hee Jung;Kim, Ji Yeon;Garred, Peter;Lee, Myung-Shik;Lee, Bok Luel
    • BMB Reports
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    • v.46 no.7
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    • pp.376-381
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    • 2013
  • It is unknown how soluble pattern-recognition receptors in blood, such as mannose-binding lectin (MBL) and ficolins, modulate mast cell-mediated inflammatory responses. We investigate how mouse MBL-A or ficolin-A regulate mouse bone marrow-derived mast cells (mBMMCs)-derived inflammatory response against bacterial lipopolysaccharide (LPS) stimulation. LPS-mediated pro-inflammatory cytokine productions on mBMMCs obtained from Toll-like receptor4 (TLR4)-deficient mice, TLR2-defficient mice, and their wildtype, were specifically attenuated by the addition of either mouse MBL-A or ficolin-A in a dose-dependent manner. However, the inhibitory effects by mouse MBL-A or ficolin-A were restored by the addition of mannose or N-acetylglucosamine, respectively. These results suggest that mouse MBL-A and ficolin-A bind to LPS via its carbohydrate-recognition domain and fibrinogen-like domain, respectively, whereby cytokine production by LPS-mediated TLR4 in mBMMCs appears to be down-regulated, indicating that mouse MBL and ficolin may have an inhibitory function toward mouse TLR4-mediated excessive inflammation on the mast cells.