Journal article
Identification of promising host-induced silencing targets among genes preferentially transcribed in haustoria of Puccinia
BMC genomics, Vol.16(1), pp.579-579
08/05/2015
Handle:
https://hdl.handle.net/2376/114371
PMCID: PMC4524123
PMID: 26238441
Abstract
The cereal rust fungi are destructive pathogens that affect grain production worldwide. Although the genomic and transcript sequences for three Puccinia species that attack wheat have been released, the functions of large repertories of genes from Puccinia still need to be addressed to understand the infection process of these obligate parasites. Host-induced gene silencing (HIGS) has emerged a useful tool to examine the importance of rust fungus genes while growing within host plants. In this study, HIGS was used to test genes from Puccinia with transcripts enriched in haustoria for their ability to interfere with full development of the rust fungi.
Approximately 1200 haustoria enriched genes from Puccinia graminis f. sp. tritici (Pgt) were identified by comparative RNA sequencing. Virus-induced gene silencing (VIGS) constructs with fragments of 86 Puccinia genes, were tested for their ability to interfere with full development of these rust fungi. Most of the genes tested had no noticeable effects, but 10 reduced Pgt development after co-inoculation with the gene VIGS constructs and Pgt. These included a predicted glycolytic enzyme, two other proteins that are probably secreted and involved in carbohydrate or sugar metabolism, a protein involved in thiazol biosynthesis, a protein involved in auxin biosynthesis, an amino acid permease, two hypothetical proteins with no conserved domains, a predicted small secreted protein and another protein predicted to be secreted with similarity to bacterial proteins involved in membrane transport. Transient silencing of four of these genes reduced development of P. striiformis (Pst), and three of also caused reduction of P. triticina (Pt) development.
Partial suppression of transcripts involved in a large variety of biological processes in haustoria cells of Puccinia rusts can disrupt their development. Silencing of three genes resulted in suppression of all three rust diseases indicating that it may be possible to engineer durable resistance to multiple rust pathogens with a single gene in transgenic wheat plants for sustainable control of cereal rusts.
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Details
- Title
- Identification of promising host-induced silencing targets among genes preferentially transcribed in haustoria of Puccinia
- Creators
- Chuntao Yin - Department of Plant Pathology, Washington State University, Pullman, WA, 99164-6430, USASamantha I Downey - Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164-6430, USANaeh L Klages-Mundt - Department of Biology, Carleton College, One North College St., Northfield, MN, 55057, USASowmya Ramachandran - Department of Plant Pathology, Washington State University, Pullman, WA, 99164-6430, USAXianming Chen - US Department of Agriculture, Agricultural Research Service, Wheat Genetics, Quality, Physiology and Disease Research Unit, Pullman, WA, 99164-6430, USALes J Szabo - US Department of Agriculture, Agricultural Research Service, Cereal Disease Laboratory, St. Paul, MN, 55108, USAMichael Pumphrey - Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164-6430, USAScot H Hulbert - Department of Plant Pathology, Washington State University, Pullman, WA, 99164-6430, USA. scot_hulbert@wsu.edu
- Publication Details
- BMC genomics, Vol.16(1), pp.579-579
- Academic Unit
- Crop and Soil Sciences, Department of; Plant Pathology, Department of
- Publisher
- England
- Identifiers
- 99900547900901842
- Language
- English
- Resource Type
- Journal article