[Objective] This study aimed to investigate the biological characteristics of a Bacillus thuringiensis strain YNI-1, which has high virulence to Lepidoptera spp. [Method] The crystal protein of YNI-1 was analyzed by S...[Objective] This study aimed to investigate the biological characteristics of a Bacillus thuringiensis strain YNI-1, which has high virulence to Lepidoptera spp. [Method] The crystal protein of YNI-1 was analyzed by SDS-PAGE, and its indoor and field efficacy for Lepidoptera spp. was investigated. [Result] The parasporal crystal of YNI-1 has a diamond-like structure. The molecular weight of the original toxin protein is 136 kDa. After trypsin treatment, the original toxin protein was hy- drolyzed into active toxin protein with molecular weight of 63 kDa. For Plutella xy- Iostella and Pieris rapae, the indoor efficacy of B. thuringiensis was better than that of commercial B. thuringiensis （WP）. In view of field efficacy, rate of YNI-1 strain was higher than that of commercial B [Conelusion] YNI-1 strain has excellent development potential. the insects reduced thuringiensis （WP）.展开更多
Present mature plants hydroponic technology was used,combined with some excellent characteristics,such as growth conditions was easy to control and process of root growth was easy to continuously observe,the nematicid...Present mature plants hydroponic technology was used,combined with some excellent characteristics,such as growth conditions was easy to control and process of root growth was easy to continuously observe,the nematicidal activity of 5 kinds of Chinese herbs extracts and the compound solution of Avermectin,with strong contact toxicity effect indoor,was systematically studied and investigated the affection on the root-knot nematode parasitized on the cucumber seeding stage. It is found that under the premise of no influence on root growth of cucumber,extracts from Picrorhiza scrophulariiflora and Punica granatum showed strong prevention and nematicidal activity,and had the similar efficacy of Avermectin; while the extracts from Cibotium barometz,Aucklandia lappa Decne and Fructus cnidii showed low nematicidal activity and various degrees inhibition effect on plant growth.展开更多
以BALB/c小鼠和IFN-γ^-/-小鼠为研究对象,应用病理组织学方法,H&E和IHC技术,观察研究TgTigerCHn2(Chinese1,ToxoDB#9)弓形虫感染后急性期死亡小鼠主要器官的组织细胞损伤和虫体分布特点。病理和组织学检查显示,106个TgTigerCHn2速...以BALB/c小鼠和IFN-γ^-/-小鼠为研究对象,应用病理组织学方法,H&E和IHC技术,观察研究TgTigerCHn2(Chinese1,ToxoDB#9)弓形虫感染后急性期死亡小鼠主要器官的组织细胞损伤和虫体分布特点。病理和组织学检查显示,106个TgTigerCHn2速殖子腹腔感染的BALB/c和IFN-γ^-/-小鼠平均生存时间分别约为9.8 DPI(days post infection)和7.7 DPI(P<0.05)。BALB/c小鼠病理表现为脾脏和淋巴结淋巴细胞坏死,弓形虫虫体抗原弥散性分布;间质性肺炎;肝细胞空泡变性及坏死,淋巴细胞弥散性浸润;大脑可见严重的脑膜炎和血管袖套现象。IFN-γ^-/-小鼠主要表现为肝脏有坏死灶,脾脏和淋巴结实质细胞的坏死和减少。IHC显示,BALB/c小鼠大脑的虫体抗原显著多于IFN-γ^-/-小鼠(P<0.01)。结果表明,TgTigerCHn2感染BALB/c小鼠后,虫体主要分布在大脑、肝脏、脾脏、淋巴结和肺脏,而IFN-γ^-/-小鼠各器官表现为炎症反应较轻的坏死性病变。展开更多
基金Supported by Natural Science Foundation of Yanbian University(2011-34)~~
文摘[Objective] This study aimed to investigate the biological characteristics of a Bacillus thuringiensis strain YNI-1, which has high virulence to Lepidoptera spp. [Method] The crystal protein of YNI-1 was analyzed by SDS-PAGE, and its indoor and field efficacy for Lepidoptera spp. was investigated. [Result] The parasporal crystal of YNI-1 has a diamond-like structure. The molecular weight of the original toxin protein is 136 kDa. After trypsin treatment, the original toxin protein was hy- drolyzed into active toxin protein with molecular weight of 63 kDa. For Plutella xy- Iostella and Pieris rapae, the indoor efficacy of B. thuringiensis was better than that of commercial B. thuringiensis （WP）. In view of field efficacy, rate of YNI-1 strain was higher than that of commercial B [Conelusion] YNI-1 strain has excellent development potential. the insects reduced thuringiensis （WP）.
基金Supported by Science and Technology Project from Shaanxi Provincial Department of EducationMajor Scientific and Technological In-novation Project of Shaanxi Province (2009ZKC08-09 )Science and Technology Project of Wenzhou (H20080045)~~
文摘Present mature plants hydroponic technology was used,combined with some excellent characteristics,such as growth conditions was easy to control and process of root growth was easy to continuously observe,the nematicidal activity of 5 kinds of Chinese herbs extracts and the compound solution of Avermectin,with strong contact toxicity effect indoor,was systematically studied and investigated the affection on the root-knot nematode parasitized on the cucumber seeding stage. It is found that under the premise of no influence on root growth of cucumber,extracts from Picrorhiza scrophulariiflora and Punica granatum showed strong prevention and nematicidal activity,and had the similar efficacy of Avermectin; while the extracts from Cibotium barometz,Aucklandia lappa Decne and Fructus cnidii showed low nematicidal activity and various degrees inhibition effect on plant growth.
文摘以BALB/c小鼠和IFN-γ^-/-小鼠为研究对象,应用病理组织学方法,H&E和IHC技术,观察研究TgTigerCHn2(Chinese1,ToxoDB#9)弓形虫感染后急性期死亡小鼠主要器官的组织细胞损伤和虫体分布特点。病理和组织学检查显示,106个TgTigerCHn2速殖子腹腔感染的BALB/c和IFN-γ^-/-小鼠平均生存时间分别约为9.8 DPI(days post infection)和7.7 DPI(P<0.05)。BALB/c小鼠病理表现为脾脏和淋巴结淋巴细胞坏死,弓形虫虫体抗原弥散性分布;间质性肺炎;肝细胞空泡变性及坏死,淋巴细胞弥散性浸润;大脑可见严重的脑膜炎和血管袖套现象。IFN-γ^-/-小鼠主要表现为肝脏有坏死灶,脾脏和淋巴结实质细胞的坏死和减少。IHC显示,BALB/c小鼠大脑的虫体抗原显著多于IFN-γ^-/-小鼠(P<0.01)。结果表明,TgTigerCHn2感染BALB/c小鼠后,虫体主要分布在大脑、肝脏、脾脏、淋巴结和肺脏,而IFN-γ^-/-小鼠各器官表现为炎症反应较轻的坏死性病变。
