Plant Innate Immune Response: Qualitative and Quantitative Resistance
Open Access
- 2 January 2016
- journal article
- research article
- Published by Taylor & Francis Ltd in Critical Reviews in Plant Sciences
- Vol. 35 (1), 38-55
- https://doi.org/10.1080/07352689.2016.1148980
Abstract
Plant diseases, caused by microbes, threaten world food, feed, and bioproduct security. Plant resistance has not been effectively deployed to improve resistance in plants for lack of understanding of biochemical mechanisms and genetic bedrock of resistance. With the advent of genome sequencing, the forward and reverse genetic approaches have enabled deciphering the riddle of resistance. Invading pathogens produce elicitors and effectors that are recognized by the host membrane-localized receptors, which in turn induce a cascade of downstream regulatory and resistance metabolite and protein biosynthetic genes (R) to produce resistance metabolites and proteins, which reduce pathogen advancement through their antimicrobial and cell wall enforcement properties. The resistance in plants to pathogen attack is expressed as reduced susceptibility, ranging from high susceptibility to hypersensitive response, the shades of gray. The hypersensitive response or cell death is considered as qualitative resistance, while the remainder of the reduced susceptibility is considered as quantitative resistance. The resistance is due to additive effects of several resistance metabolites and proteins, which are produced through a network of several hierarchies of plant R genes. Plants recognize the pathogen elicitors or receptors and then induce downstream genes to eventually produce resistance metabolites and proteins that suppress the pathogen advancement in plant. These resistance genes (R), against qualitative and quantitative resistance, can be identified in germplasm collections and replaced in commercial cultivars, if nonfunctional, based on genome editing to improve plant resistance.Keywords
This publication has 100 references indexed in Scilit:
- TaCPK2-A, a calcium-dependent protein kinase gene that is required for wheat powdery mildew resistance enhances bacterial blight resistance in transgenic riceJournal of Experimental Botany, 2013
- WRKY8 transcription factor functions in the TMV-cg defense response by mediating both abscisic acid and ethylene signaling in ArabidopsisProceedings of the National Academy of Sciences of the United States of America, 2013
- Toward an understanding of the molecular basis of quantitative disease resistance in riceJournal of Biotechnology, 2012
- Basal Host Resistance of Barley to Powdery Mildew: Connecting Quantitative Trait Loci and Candidate GenesMolecular Plant-Microbe Interactions®, 2010
- OXI1 protein kinase is required for plant immunity against Pseudomonas syringae in ArabidopsisJournal of Experimental Botany, 2009
- Overexpression of TiERF1 enhances resistance to sharp eyespot in transgenic wheatJournal of Experimental Botany, 2008
- Natural variation of potato allene oxide synthase 2 causes differential levels of jasmonates and pathogen resistance in ArabidopsisPlanta, 2008
- CERK1, a LysM receptor kinase, is essential for chitin elicitor signaling in ArabidopsisProceedings of the National Academy of Sciences of the United States of America, 2007
- The plant immune systemNature, 2006
- Plant pathogens and integrated defence responses to infectionNature, 2001