福建省农业科学院机构知识库

Growth and pathogenicity characteristics of Ralstonia solanacearum strain RS1100 in long-term stationary phase culture

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文献类型：外文期刊

作者： Zhu, Y. -J. ¹ ; Xiao, R. -F. ¹ ; Liu, B. ¹ ;

作者机构： 1.Fujian Acad Agr Sci, Agr Bioresources Inst, Fuzhou, Fujian, Peoples R China

关键词： growth;pathogenicity;Ralstonia solanacearum;RS1100;stationary phase;viability

期刊名称：JOURNAL OF PLANT DISEASES AND PROTECTION （影响因子：1.928；五年影响因子：1.652 ）

ISSN： 1861-3829

年卷期： 2010 年 117 卷 4 期

页码：

收录情况： SCI

摘要： Nonsporulating gram-negative bacteria remain metabolically active and also develop increased resistance to a variety of environmental stresses after exponential growth has stopped and cells enter stationary phase. Ralstonia solanacearum is a nonsporulating gram-negative soil-borne pathogen that causes lethal wilt diseases of many plants around the world. Its growth and pathogenicity characteristics for entering long-term stationary phase were investigated by a prolonged 20-day laboratory culture. The data obtained from viability trial revealed that similar to 99% of R. solanacearum strain RS1100 (race 1) died at day 14 in SPA medium and then survivors maintained at similar to 10(5) cfu ml(-1) until the 20(th) day. Binary fission was observed and two modes of death procedures were assumed for growth of R. solanacearum under transmission electronic microscope, nucleoid condensation or nucleoid fragmentation and cytolysis. The latent period for R. solanacearum causing plant wilt prolonged while the cell density reduced gradually. The pathogen retained its aggressiveness at low density as 1.13 x 10(5) cfu ml(-1) at 20th day. Both mucoid and nonmucoid forms of R. solanacearum were coexistent throughout the experiment with varying ratio. The results here confirm that upon entering long-term stationary phase R. solanacearum can survive the stress conditions of nutrient starvation during prolonged stationary phase.

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Growth and pathogenicity characteristics of Ralstonia solanacearum strain RS1100 in long-term stationary phase culture

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意见箱

Growth and pathogenicity characteristics of Ralstonia solanacearum strain RS1100 in long-term stationary phase culture

作者其他论文 更多>>

First Report of Apiospora arundinis Causing Wet Root Rot of Pseudostellaria heterophylla in China

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Laboratory studies on the effect of the bioinsecticide GCSC-BtA on mortality and feeding of diamondback moth Plutella xylostella L. (Lepidoptera : Plutellidae) larvae on cabbage

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作者其他论文更多>>

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