Putative Rust Fungal Effector Proteins in Infected Bean and Soybean Leaves

Phytopathology
Bret CooperNazrul Islam

Abstract

The plant-pathogenic fungi Uromyces appendiculatus and Phakopsora pachyrhizi cause debilitating rust diseases on common bean and soybean. These rust fungi secrete effector proteins that allow them to infect plants, but their effector repertoires are not understood. The discovery of rust fungus effectors may eventually help guide decisions and actions that mitigate crop production loss. Therefore, we used mass spectrometry to identify thousands of proteins in infected beans and soybeans and in germinated fungal spores. The comparative analysis between the two helped differentiate a set of 24 U. appendiculatus proteins targeted for secretion that were specifically found in infected beans and a set of 34 U. appendiculatus proteins targeted for secretion that were found in germinated spores and infected beans. The proteins specific to infected beans included family 26 and family 76 glycoside hydrolases that may contribute to degrading plant cell walls. There were also several types of proteins with structural motifs that may aid in stabilizing the specialized fungal haustorium cell that interfaces the plant cell membrane during infection. There were 16 P. pachyrhizi proteins targeted for secretion that were found in infected soybea...Continue Reading

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Citations

Apr 25, 2017·Phytopathology·Bret Cooper, Kimberly B Campbell
May 16, 2018·Proceedings of the National Academy of Sciences of the United States of America·Linan XieYuquan Xu
Dec 17, 2018·The New Phytologist·Cécile LorrainSébastien Duplessis
Dec 5, 2019·Phytopathology·Guus Bakkeren, Les J Szabo
Oct 21, 2020·Microbiological Research·Rajdeep JaswalT R Sharma

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