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Rice blast fungus study sheds new light on virulence mechanisms of plant pathogenic fungi

Date:
May 14, 2019
Source:
American Phytopathological Society
Summary:
Researchers examined the fungal cell biology of rice blast fungus pathogenesis and recently published the first systematic and comprehensive report on the molecular mechanism of the actin-binding protein (MoAbp1) that plays a crucial role in the pathogenicity of the fungus.
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Rice blast fungus (Magnaporthe oryzae) is a global food security threat due to its destruction of cultivated rice, the most widely consumed staple food in the world. Disease containment efforts using traditional breeding or chemical approaches have been unsuccessful as the fungus can rapidly adapt and mutate to develop resistance. Because of this, it is necessary to understand fungal infection-related development to formulate new, effective methods of blast control.

A group of scientists at Nanjing Agricultural University and Louisiana State University Health Sciences Center examined the fungal cell biology of rice blast fungus pathogenesis and recently published the first systematic and comprehensive report on the molecular mechanism of the actin-binding protein (MoAbp1) that plays a crucial role in the pathogenicity of the fungus.

Through ongoing research, these scientists found that rice blast fungus forms a specialized infection structure that applies mechanical force to rupture the rice leaf cuticle. Once inside the host, the infection proliferates by living off the plant's nutrients. These two processes are enabled by the actin-binding protein (MoABp1) that links an actin-regulating kinase (MoArk1) and a cyclase-associated protein (MoCap1) to an actin protein (MoAct1). These processes are necessary for the growth and perseverance of the fungus.

On a large scale, these findings shed a new light on the eukaryotic cell biology and virulence mechanisms of plant pathogenic fungi. On a smaller scale, these findings could reveal novel approaches or targets for anti-blast fungus management.


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Materials provided by American Phytopathological Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Lianwei Li, Shengpei Zhang, Xinyu Liu, Rui Yu, Xinrui Li, Muxing Liu, Haifeng Zhang, Xiaobo Zheng, Ping Wang, Zhengguang Zhang. Magnaporthe oryzae Abp1, a MoArk1 Kinase-Interacting Actin Binding Protein, Links Actin Cytoskeleton Regulation to Growth, Endocytosis, and Pathogenesis. Molecular Plant-Microbe Interactions, 2019; 32 (4): 437 DOI: 10.1094/MPMI-10-18-0281-R

Cite This Page:

American Phytopathological Society. "Rice blast fungus study sheds new light on virulence mechanisms of plant pathogenic fungi." ScienceDaily. ScienceDaily, 14 May 2019. <www.sciencedaily.com/releases/2019/05/190514162210.htm>.
American Phytopathological Society. (2019, May 14). Rice blast fungus study sheds new light on virulence mechanisms of plant pathogenic fungi. ScienceDaily. Retrieved April 14, 2024 from www.sciencedaily.com/releases/2019/05/190514162210.htm
American Phytopathological Society. "Rice blast fungus study sheds new light on virulence mechanisms of plant pathogenic fungi." ScienceDaily. www.sciencedaily.com/releases/2019/05/190514162210.htm (accessed April 14, 2024).

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