Why did filamentous plant pathogens evolve the potential to secrete hundreds of effectors to enable disease?

Effectors of Filamentous Plant Pathogens: Commonalities amid Diversity

(2017) Marina Franceschetti et al.   MICROBIOLOGY AND MOLECULAR BIOLOGY REVIEWS

Ustilago maydis effectors and their impact on virulence

(2017) Daniel Lanver et al.   NATURE REVIEWS MICROBIOLOGY

Insights into Host Cell Modulation and Induction of New Cells by the Corn Smut Ustilago maydis

(2017) Amey Redkar et al.   Frontiers in Plant Science

The cell biology of late blight disease

(2016) Stephen C Whisson et al.   CURRENT OPINION IN MICROBIOLOGY

Avirulence Genes in Cereal Powdery Mildews: The Gene-for-Gene Hypothesis 2.0

(2016) Salim Bourras et al.   Frontiers in Plant Science

Convergent Targeting of a Common Host Protein-Network by Pathogen Effectors from Three Kingdoms of Life

(2014) Ralf Weßling et al.   Cell Host & Microbe

Effectors and Effector Delivery in Magnaporthe oryzae

(2014) Shijie Zhang et al.   PLoS Pathogens

Host-Induced Gene Silencing in Barley Powdery Mildew Reveals a Class of Ribonuclease-Like Effectors

(2013) Clara Pliego et al.   MOLECULAR PLANT-MICROBE INTERACTIONS

Lifestyle transitions in plant pathogenic Colletotrichum fungi deciphered by genome and transcriptome analyses

(2012) Richard J O'Connell et al.   NATURE GENETICS

Independently Evolved Virulence Effectors Converge onto Hubs in a Plant Immune System Network

(2011) M. S. Mukhtar et al.   SCIENCE

Deletions in the Repertoire of Pseudomonas syringae pv. tomato DC3000 Type III Secretion Effector Genes Reveal Functional Overlap among Effectors

(2009) Brian H. Kvitko et al.   PLoS Pathogens