Characterization of a tryptophan 2-monooxygenase gene from Puccinia graminis f. sp. tritici involved in auxin biosynthesis and rust pathogenicity

Molecular Plant-microbe Interactions : MPMI
Chuntao YinScot Hulbert

Abstract

The plant hormone indole-3-acetic acid (IAA) is best known as a regulator of plant growth and development but its production can also affect plant-microbe interactions. Microorganisms, including numerous plant-associated bacteria and several fungi, are also capable of producing IAA. The stem rust fungus Puccinia graminis f. sp. tritici induced wheat plants to accumulate auxin in infected leaf tissue. A gene (Pgt-IaaM) encoding a putative tryptophan 2-monooxygenase, which makes the auxin precursor indole-3-acetamide (IAM), was identified in the P. graminis f. sp. tritici genome and found to be expressed in haustoria cells in infected plant tissue. Transient silencing of the gene in infected wheat plants indicated that it was required for full pathogenicity. Expression of Pgt-IaaM in Arabidopsis caused a typical auxin expression phenotype and promoted susceptibility to the bacterial pathogen Pseudomonas syringae pv. tomato DC3000.

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Citations

Sep 24, 2015·BMC Genomics·Nicholas A MuethScot H Hulbert
Jan 27, 2015·Current Opinion in Biotechnology·Arne WeibergHailing Jin
Aug 19, 2015·Frontiers in Plant Science·Melania FigueroaJames M Bradeen
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Oct 19, 2016·Phytopathology·Sowmya R RamachandranScot H Hulbert
Feb 7, 2014·Molecular Plant-microbe Interactions : MPMI·Scot Hulbert, Michael Pumphrey
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Jun 27, 2018·International Journal of Molecular Sciences·Bang AnChaozu He
Jan 10, 2020·BMC Genomics·Laura Hernandez-EscribanoSanushka Naidoo
Jun 16, 2017·PLoS Pathogens·Rajesh N Patkar, Naweed I Naqvi
Dec 27, 2017·The Plant Journal : for Cell and Molecular Biology·Luis Rodriguez-MorenoBart P H J Thomma
Dec 23, 2017·Journal of Experimental Botany·Barbara N Kunkel, Christopher P Harper
Apr 14, 2019·Planta·Pramod PrasadSubodh Kumar
Jul 13, 2019·Frontiers in Plant Science·Xiaowei Han, Regine Kahmann
Jul 8, 2020·International Journal of Molecular Sciences·Diana SajaGábor Gullner
Jun 4, 2019·Frontiers in Microbiology·Claudia A Ramírez-ValdespinoVianey Olmedo-Monfil
Jun 6, 2020·Pathogens·Sajid MehmoodZhensheng Kang
Jul 1, 2020·Phytopathology·Anna StaskoAnne Elizabeth Dorrance

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