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Ji Chunxiang,Li Yingyue,Xiao Qingchen,Li Zishan,Wang Boyan,Geng Xiaowan,Lin Keqing,Zhang Qing,Jin Yuan,Zhai Yuqian,Li Xiaoyu,Chen Jin 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.8
Arbuscular mycorrhizal fungi (AMF) are widespread soil endophytic fungi, forming mutualistic relationships with the vast majority of land plants. Biochar (BC) has been reported to improve soil fertility and promote plant growth. However, limited studies are available concerning the combined effects of AMF and BC on soil community structure and plant growth. In this work, a pot experiment was designed to investigate the effects of AMF and BC on the rhizosphere microbial community of Allium fistulosum L. Using Illumina high-throughput sequencing, we showed that inoculation of AMF and BC had a significant impact on soil microbial community composition, diversity, and versatility. Increases were observed in both plant growth (the plant height by 8.6%, shoot fresh weight by 12.1%) and root morphological traits (average diameter by 20.5%). The phylogenetic tree also showed differences in the fungal community composition in A. fistulosum. In addition, Linear discriminant analysis (LDA) effect size (LEfSe) analysis revealed that 16 biomarkers were detected in the control (CK) and AMF treatment, while only 3 were detected in the AMF + BC treatment. Molecular ecological network analysis showed that the AMF + BC treatment group had a more complex network of fungal communities, as evidenced by higher average connectivity. The functional composition spectrum showed significant differences in the functional distribution of soil microbial communities among different fungal genera. The structural equation model (SEM) confirmed that AMF could improve the microbial multifunctionality by regulating the rhizosphere fungal diversity and soil properties. Our findings provide new information on the effects of AMF and biochar on plants and soil microbial communities.
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Yingyu Li,Shin’ya Nagasawa 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
The purpose of this paper is to explore underlying antecedents for inconspicuous luxury motivations by developing and testing a conceptual model under the self-concept mechanism with the influence of cultural capital. A questionnaire-based survey is used to collect data, and structural equation modeling is applied to analyze the data. Although growing interests in academia focus on the relationship between cultural capital and inconspicuous luxury, quantitative studies are scant. This research contributes to the literature by empirically investigating the impact of cultural capital in the relationship within the construct of consumers’ self-concept and inconspicuous luxury motivations.
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Dongsheng Liu,Jian Zhao,Xiaobing Chen,Yingyu Li,Shipan Weiyan,Mengmeng Feng 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.3
We examined the dynamic processes of hyporheic exchange and temperature distribution in a riparian zone in response to low-temperature water fluctuations downstream of the Xin’an River Dam, China, using analytical and mainly hydrodynamic methods. For this purpose, we installed six HM21 piezometers (R, P1–P5) between the river water and the groundwater at an interval of approximately 2 m perpendicular to the flow path. We also installed 20 PT100 thermistors (T1–T20) along the transect at depths of 1.19 m to 3.58 m and monitored the temperatures of river and air. Water levels and temperatures were automatically logged every 5 min by the real-time system from November to December 2014 and sent to the remote platform through the remote terminal unit. Results revealed that the intensity and direction of the hyporheic exchange (Q) between the river water and the groundwater varied periodically (t = 1 d) with the water level of the river. In each cycle, the Q was in a counterclockwise loop curve with the water level of the river and with the non-uniform distribution along the transect perpendicular to the river, which showed that the farther the lateral exchange was away from the river, the lower its intensity and the more hysteretic the alteration of its direction. The daily exchange width and residence time had no necessary connection with the average river stage, but mainly depended on the amplitude of the fluctuating river stage and the duration of river infiltration and established a strong linear relationship with their product. The temperature distribution of the riparian aquifer was mainly affected by the surface radiation and river water infiltration. It was characterized as “cool on the surface and warm at the bottom” in the vertical direction and could be divided into low-, medium-, and high-temperature zones along the horizontal direction. The horizontal infiltration distance (L) increased by power functions with the increase in infiltration rate (v) and decrease in river temperature (T).
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Chen, Chao,Wang, Yumei,Su, Chun,Zhao, Xinqing,Li, Ming,Meng, Xiaowei,Jin, Yingyu,Yang, Seung-Hwan,Ma, Yushu,Wei, Wei,Joo-Won, Suh 한국응용생명화학회 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.1
Passalora fulva (or Fulvia fulva) is the causal microorganism of tomato leaf mold, the outbreak of which occurs worldwide in greenhouse especially when humidity is high. However, studies on antifungal agents of P. fulva are still very limited. In this study, a marine-derived Streptomyces albidoflavus strain L131 showing potent inhibitory activities against P. fulva was identified and characterized. The active antifungal components were obtained, and studies on the antifungal mechanisms of the crude extract showed that the antifungal metabolites of L131 caused damage of hyphae and spore development, as well as plasma membrane of P. fulva. In addition, accumulation of endogenous reactive oxygen species of the leaf pathogen was also observed after treatment by culture extracts of L131. To our knowledge, this is the first report on the studies of the antifungal mechanisms against P. fulva, which benefit further development of biocontrol agent against tomato leaf mold disease.
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