Wheat mutant MNR220 delays haustoria formation during leaf rust pathogenesis at the seedling stage

Autor:	Mina R. Talajoor, Hongtao Zhang, Li Huang, Linda Tabe, Evans Lagudah, Sridhar Bhavani, Peng Zhang, Xiaojing Wang
Rok vydání:	2016
Předmět:	0106 biological sciences 0301 basic medicine biology Mutant Defence mechanisms Rust (fungus) food and beverages Plant Science Plant disease resistance Stem rust biology.organism_classification 01 natural sciences Microbiology 03 medical and health sciences 030104 developmental biology Haustorium Botany Agronomy and Crop Science Pathogen Powdery mildew 010606 plant biology & botany
Zdroj:	Canadian Journal of Plant Pathology. 38:338-347
ISSN:	1715-2992 0706-0661
Popis:	This study reports further characterization of the defence mechanism of an EMS-induced mutant (MNR220) that displays enhanced resistance to leaf rust, stem rust, stripe rust and powdery mildew diseases. The broad-spectrum resistance of the mutant was characterized by a microscopy study and additional race screenings of two rust pathogens. The mutant displayed less disease severity in response to all the races tested, when compared with the wild-type. The microscopy study of the pathogenesis of a leaf rust race PBJJG on the mutant revealed that the resistance was first evident at the pre-haustorial stage; formation of haustoria was significantly delayed or inhibited in the mutant compared with the wild-type. The mutant displayed microscopic level of cell death even in the absence of any pathogens. These findings suggest that MNR220 mediates a spontaneous cell death that delays the infection process by delaying haustoria formation of the pathogen.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::461fd8b054d35190b084e0bf89a8156a https://doi.org/10.1080/07060661.2016.1205663 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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