检索结果-南通市图书馆

culture filtrates of Trichoderma Isolate H921 Inhibit Magnaporthe oryzae Spore Germination and Blast Lesion Formation in Rice

引用

Advances in Microbiology 2016年第7期6卷 521-527页

作者： Quyet Thi Nguyen Kana Ueda Junichi Kihara Makoto Ueno Laboratory of Plant Pathology Faculty of Life and Environmental Science Shimane University Matsue Japan

Spore germination and appressorium formation of Magnaporthe oryzae spores was completely suppressed by an ethyl acetate extract of the culture filtrate from the H921 isolate (H921-EAE-CF). Production of antifungal substance(s) in the H921-EAE-CF began to increase up to 3 days after isolate H921 incubation. Furthermore, heat treatment (105°C or 121°C) of H921-EAE-CF did not alter its inhibitory effect on M. oryzae spore germination compared to non-heat-treated H921-EAE-CF. Blast lesion formation inhibition by H921-EAE-CF was dose-dependent. Internal transcribed spacer (ITS) region sequence analysis indicated that this isolate shared similarities with species of the genera Trichoderma. This study suggests that H921-EAE-CF contains some antifungal substances that could be promising candidates for control of rice blast disease.

关键词： culture filtrate Magnaporthe oryzae Trichoderma sp. Rice

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bacillus cereus X5 Enhanced Bio-Organic Fertilizers Effectively Control Root-Knot Nematodes(Meloidogyne sp.)

引用

Pedosphere 2013年第2期23卷 160-168页

作者： XIAO Tong-Jian CHEN Fang GAO Chao ZHAO Qing-Yun SHEN Qi-Rong RAN Wei Jiangsu Provincial Key Lab for Solid Organic Waste Utilization Nanjing Agricultural University

The efficacy of Bacillus cereus X5 as a potential biological control agent against root-knot nematodes was evaluated in vitro by examining second-stage juvenile mortality and egg hatching rate under addition of culture filtrate and in planta by application of bio-organic fertilizers enhanced with B. cereus X5, B. thuringiensis BTG, or Trichoderma harzianum SQR-T037 alone or together in greenhouse and field experiments. The biofumigation of the root-knot nematode-infested soil with organic materials (chicken manure, pig manure and rice straw) alone or in combination with B. cereus X5 was also conducted in greenhouse experiments. In laboratory, the filtrate of B. cereus X5 more effectively reduced egg hatching rates during the incubation period for 14 d and more effectively killed the second-stage juvenile during the incubation period of 24 h than that of B. thuringiensis BTG. The highest dry shoot weights for greenhouse tomatoes and field muskmelons were found in both the treatment consisting of the bio-organic fertilizer enhanced with the three biocontrol agents and the treatment consisting of the bio-organic fertilizer enhanced only with B. cereus X5. The two bio-organic fertilizers achieved better nematicidal effects than those enhanced only with B. thuringiensis BTG or T. harzianum SQR-T037. B. cereus X5 also enhanced effect of biofumigation, which resulted in increased plant biomass and reduced nematode counts in the roots and rhizosphere soil. Therefore, these results suggested that biological control of root-knot nematodes both in greenhouses and fields could be effectively achieved by using B. cereus X5 and agricultural wastes.

关键词： biofumigation biological control culture filtrate muskmelon rhizosphere soil

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimal culture of prairie milk vetch root and measurement on its allelopathic effect

Optimal culture of prairie milk vetch root and measurement o...

引用

中国第二届植物化感作用学术研讨会暨中国植物保护学会植物化感作用专业委员会成立大会

作者： YU Fuke MA Yongqing Institute of Soil and Water Conservation Chinese Academy of SciencesMinistry of Water Resource Graduate School of Chinese Academy of Sciences Northwest Sci-Tech University of Agriculture & Forestry

The objective of this research was to determine the optimum concentration of sucrose, macro-elements, micro-elements and organic supplements for the propagation of prairie milk vetch (Astragalus adsurgens Pall) roots on B5 media. An orthogonal design was used to test multiple factors. A second objective was to test for allelopathic effect of the prairie milk vetch roots by conducting a bioassay using the extracts isolated from culture filtrates with ethyl acetate after culturing the roots. The results indicated that strength macro-elements and strength micro-elements with exception of standard concentration of MnSO4 and strength basic organic supplements in the B5 medium with addition of 3.0% sucrose and 1.074 umol l-1 NAA is the optimal medium for the propagation of prairie milk vetch root. A bioassay using the culture filtrate extracts indicated that the roots might have produced allelopathic chemicals during their culture. Differences in the degree of allelopathic effects suggest that the nutrient stress may influence the production of the allelopathic chemicals. This study provides a basis for the improvement of root regeneration and propagation in prairie milk vetch and suggests that nutrition may influence the production of allelopathic chemicals by this plant.

关键词： allelopathic effect culture filtrate cultured root extract optimal culture prairie milk vetch.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effect of prairie milk vetch (Astragalus adsurgens Pall) cultured root on proliferation of Stellera chamaejasme Linn

Effect of prairie milk vetch (Astragalus adsurgens Pall) cul...

引用

中国第二届植物化感作用学术研讨会暨中国植物保护学会植物化感作用专业委员会成立大会

The effect of prairie milk vetch (Astragalus adsurgens Pall) root culture filtrates extracts with ethyl acetate was studied by using cultured shoot of Stellera chamaejasme Linn as receptor. The result showed that virtual propagation, elongation and dry weight accumulation of S. chamaejasme cultured shoot was stimulated by adding 6.4 mg/L the extract to the growth media, but the fresh weight accumulation of S. chamaejasme was inhibited. When the extract was added at the level of 3.2, 12.7, 25.4 mg/L, the virtual propagation, elongation and dry weight accumulation of S. chamaejasme cultured shoot was inhibited obviously. The more the extraction was used, the more intensive the inhibitory effect became. The effect of the extracts used at these 3 levels on fresh weight accumulation of S. chamaejasme cultured shoot is also inhibitive. The inhibitive effect was increased then decreased, with the increasing of the extracts. Moreover, this study indicated that the inhibitive or stimulative effects of prairie milk vetch root culture filtrates extracts with ethyl acetate on S. chamaejasme cultured shoot were due to chemical secretion from the cultured root. It has proved that prairie millk vetch has allelopathic effect on S. chamaejasme.

关键词： prairie milk vetch (Astragalus adsurgens Pall) cultured root culture filtrate Stellera chamaejasme L. proliferation allelopathic effect

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：