Li Yang

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Education:

Project Description:

Functional characterization of a convergent host target of divergent pathogen effectors

    Interactions between pathogenic microorganisms and their plant hosts are complex and dynamic. Pathogens deliver effector proteins (virulence factors) into plant cells to dampen basal defense and modulate host cellular activity. Direct or indirect recognition of these effectors by polymorphic intracellular plant proteins triggers a successful immune response. PPIN-1, a Plant Pathogen Immune Network of oomycete and Pseudomonas effectors and Arabidopsis proteins recently defined in the host laboratory, demonstrates that evolutionarily divergent effectors converge onto a limited set of interconnected host proteins. TCP transcription factors, especially TCP14, are among the most common targets of these effectors, and the host proteins interacting with TCPs are highly interconnected. A better understanding of how TCP proteins serve to modulate the plant immune system will shed light on co-evolutionary arms race between plants and their pathogens. I will use genetic, computational and biochemical tools to dissect the functions of several TCP genes in the plant immune system.

 

Publications:

 Belkhadir Y, L Yang, J Hetzel, JL Dangl, J Chory (2014) The growth–defense pivot: crisis management in plants mediated by LRR-RK surface receptors Trends in biochemical sciences 39 (10), 447-456

 We▀ling R*, P Epple*, S Altmann*, Y He*, L Yang*, SR Henz, N McDonald, ...(2014) Convergent Targeting of a Common Host Protein-Network by Pathogen Effectors from Three Kingdoms of Life Cell host & microbe 16 (3), 364-375

Yang L, H Huang (2014) Roles of small RNAs in plant disease resistance Journal of integrative plant biology

Yang L, M Xu, Y Koo, J He, RS Poethig (2013) Sugar promotes vegetative phase change in Arabidopsis thaliana by repressing the expression of MIR156A and MIR156CeLife 2  

Yang L, Wu G, and Poethig RS (2012) Mutations in the GW-protein SUO reveal a developmental function for miRNA-mediated translational repression in Arabidopsis. Proc Natl Acad Sci U S A. 2012 Jan 3;109(1):315-20.

Yang L, Conway SR and Poethig RS. (2011) Vegetative phase change is mediated by a leaf-derived signal that represses the transcription of miR156. Development. 2011 Jan;138(2):245-9.

Yamaguchi A, Wu MF, Yang L, Wu G, Poethig RS, Wagner D. (2009) The microRNA-regulated SBP-Box transcription factor SPL3 is a direct upstream activator of LEAFY, FRUITFULL, and APETALA1. Dev Cell. 2009 Aug;17(2):268-78.

Schmidt PS, Zhu CT, Das J, Batavia M, Yang L, Eanes WF. (2008) An amino acid polymorphism in the couch potato gene forms the basis for climatic adaptation in Drosophila melanogaster. Proc Natl Acad Sci U S A. 2008 Oct 21;105(42):16207-11.

Yao X, Wang H, Li H, Yuan Z, Li F, Yang L, Huang H. (2009) Two types of cis-acting elements control the abaxial epidermis-specific transcription of the MIR165a and MIR166a genes. FEBS Lett. 2009 Nov 19;583(22):3711-7.

Xu L, Yang L, Huang H. (2007) Transcriptional, post-transcriptional and post-translational regulations of gene expression during leaf polarity formation. Cell Res. 2007 Jun;17(6):512-9. Review.

Fu Y, Xu L, Xu B, Yang L, Ling Q, Wang H, Huang H. (2007) Genetic interactions between leaf polarity-controlling genes and ASYMMETRIC LEAVES1 and 2 in Arabidopsis leaf patterning. Plant Cell Physiol. 2007 May;48(5):724-35.

Yang L*, Liu Z*, Lu F, Dong A, Huang H. (2006)  SERRATE is a novel nuclear regulator in primary microRNA processing in Arabidopsis. Plant J. 2006 Sep;47(6):841-50.

Yang L*, Huang W*, Wang H, Cai R, Xu Y, Huang H. (2006) Characterizations of a hypomorphic argonaute1 mutant reveal novel AGO1 functions in Arabidopsis lateral organ development. Plant Mol Biol. 2006 May;61(1-2):63-78.

Xu L*, Yang L*, Pi L, Liu Q, Ling Q, Wang H, Poethig RS, Huang H. (2006) Genetic interaction between the AS1-AS2 and RDR6-SGS3-AGO7 pathways for leaf morphogenesis. Plant Cell Physiol. 2006 Jul;47(7):853-63.