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- 저자 : Huchen Zhang (검색결과 3 건)
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Chen, Huchen,Zhang, Shuhan,He, Shengnan,A, Runa,Wang, Mingyang,Liu, Shouan The Korean Society of Ginseng 2022 Journal of Ginseng Research Vol.46 No.6
Background: Panax ginseng Meyer is one of the most valuable medicinal plants which is enriched in anti-microbe secondary metabolites and widely used in traditional medicine. Botrytis cinerea is a necrotrophic fungus that causes gray mold disease in a broad range of hosts. B. cinerea could overcome the ginseng defense and cause serious leaf and root diseases with unknown mechanism. Methods: We conducted simultaneous transcriptomic and metabolomic analysis of the host to investigate the defense response of ginseng affected by B. cinerea. The gene deletion and replacement were then performed to study the pathogenic gene in B. cinerea during ginseng - fungi interaction. Results: Upon B. cinerea infection, ginseng defense responses were switched from the activation to repression, thus the expression of many defense genes decreased and the biosynthesis of antifungal metabolites were reduced. Particularly, ginseng metabolites like kaempferol, quercetin and luteolin which could inhibit fungi growth were decreased after B. cinerea infection. B. cinerea quercetin dioxygenase (Qdo) involved in catalyzing flavonoids degradation and ∆BcQdo mutants showed increased substrates accumulation and reduced disease development. Conclusion: This work indicates the flavonoids play a role in ginseng defense and BcQdo involves in B. cinerea virulence towards the P. ginseng. B. cinerea promotes disease development in ginseng by suppressing of defense related genes expression and reduction of antifungal metabolites biosynthesis.
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Botrytis cinerea hypovirulent strain BcSpd1 induced Panax ginseng defense
Shuhan Zhang,Junyou Han,Ning Liu,Jingyuan Sun,Huchen Chen,Jinglin Xia,Huiyan Ju,Shouan Liu 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.6
Background: Gray mold, caused by Botrytis cinerea, is one of the major fungal diseases in agriculture. Biological methods are preferred over chemical fungicides to control gray mold since they are less toxicto the environment and could induce the resistance to pathogens in plants. In this work, we try tounderstand if ginseng defense to B. cinerea could be induced by fungal hypovirulent strain △BcSpd1. BcSpd1 encodes Zn(II)2Cys6 transcription factor which regulates fungal pathogenicity and we recentlyreported △BcSpd1 mutants reduced fungal virulence. Methods: We performed transcriptomic analysis of the host to investigate the induced defense responseof ginseng treated by B. cinerea △BcSpd1. The metabolites in ginseng flavonoids pathway were determinedby UPLC-ESI-MS/MS and the antifungal activates were then performed. Results: We found that △BcSpd1 enhanced the ginseng defense response when applied to healthyginseng leaves and further changed the metabolism of flavonoids. Compared with untreated plants, theapplication of △BcSpd1 on ginseng leaves significantly increased the accumulation of p-coumaric acidand myricetin, which could inhibit the fungal growth. Conclusion: B. cinerea△BcSpd1 could effectively induce the medicinal plant defense and is referred to asthe biological control agent in ginseng disease management.
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Tianxiang Pi,Zhongheng Du,Huchen Zhang,Sicheng Wang 한국콘크리트학회 2021 International Journal of Concrete Structures and M Vol.15 No.3
Autoclaved aerated concrete (AAC) block masonry has been widely used for bearing walls of multi-story buildings or non-bearing walls of high-rise buildings because of its unique advantages, such as lightweight, low pollution output, and excellent thermal insulation performance. However, traditional AAC block masonry has the disadvantages of high water absorption, poor adhesion to mortar, and low construction efficiency. In order to improve the performance of traditional AAC masonry, this paper proposed a new kind of mortar-free AAC block masonry with concrete core-columns. Fundamental mechanical properties of compression and shear were studied. We divided a total of 16 compression specimens into four groups according to different hollow ratios and strength grades of the block, and eight shear specimens into two groups based on different hollow ratios. Each specimen consists of three-layer blocks with two core columns at the point of quadri-section. The diameters of columns were, respectively, 100 mm and 80 mm. The specimens were loaded at a constant speed to evaluate their bearing capacity, displacement response, crack development, and damage state. The formula of the average values and design values of the compressive and shear strength of masonry were obtained statistically. The stress–strain constitutive relation of masonry expressed by a three-stage curve was presented. Furthermore, the result of numerical analysis using the ABAQUS finite element program aligned well with the experimental results. The compressive strength and shear strength of the new type of masonry are no less than traditional AAC masonry, and new masonry has higher construction efficiency and more stable strength.
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