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Manipulating broad-spectrum disease resistance by suppressing pathogen-induced auxin accumulation in rice.
Plant Physiol 2011; 155(1):589-602PP

Abstract

Breeding crops with the quality of broad-spectrum disease resistance using genetic resources is one of the principal goals of crop improvement. However, the molecular mechanism of broad-spectrum resistance remains largely unknown. Here, we show that GH3-2, encoding an indole-3-acetic acid (IAA)-amido synthetase, mediates a broad-spectrum resistance to bacterial Xanthomonas oryzae pv oryzae and Xanthomonas oryzae pv oryzicola and fungal Magnaporthe grisea in rice (Oryza sativa). IAA, the major form of auxin in rice, results in rice more vulnerable to the invasion of different types of pathogens, which is at least partly due to IAA-induced loosening of the cell wall, the natural protective barrier of plant cells to invaders. X. oryzae pv oryzae, X. oryzae pv oryzicola, and M. grisea secrete IAA, which, in turn, may induce rice to synthesize its own IAA at the infection site. IAA induces the production of expansins, the cell wall-loosening proteins, and makes rice vulnerable to pathogens. GH3-2 is likely contributing to a minor quantitative trait locus for broad-spectrum resistance. Activation of GH3-2 inactivates IAA by catalyzing the formation of an IAA-amino acid conjugate, which results in the suppression of expansin genes. Thus, GH3-2 mediates basal resistance by suppressing pathogen-induced IAA accumulation. It is expected that, regulated by a pathogen-induced strong promoter, GH3-2 alone may be used for breeding rice with a broad-spectrum disease resistance.

Authors+Show Affiliations

National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research , Huazhong Agricultural University, Wuhan 430070, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21071600

Citation

Fu, Jing, et al. "Manipulating Broad-spectrum Disease Resistance By Suppressing Pathogen-induced Auxin Accumulation in Rice." Plant Physiology, vol. 155, no. 1, 2011, pp. 589-602.
Fu J, Liu H, Li Y, et al. Manipulating broad-spectrum disease resistance by suppressing pathogen-induced auxin accumulation in rice. Plant Physiol. 2011;155(1):589-602.
Fu, J., Liu, H., Li, Y., Yu, H., Li, X., Xiao, J., & Wang, S. (2011). Manipulating broad-spectrum disease resistance by suppressing pathogen-induced auxin accumulation in rice. Plant Physiology, 155(1), pp. 589-602. doi:10.1104/pp.110.163774.
Fu J, et al. Manipulating Broad-spectrum Disease Resistance By Suppressing Pathogen-induced Auxin Accumulation in Rice. Plant Physiol. 2011;155(1):589-602. PubMed PMID: 21071600.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Manipulating broad-spectrum disease resistance by suppressing pathogen-induced auxin accumulation in rice. AU - Fu,Jing, AU - Liu,Hongbo, AU - Li,Yu, AU - Yu,Huihui, AU - Li,Xianghua, AU - Xiao,Jinghua, AU - Wang,Shiping, Y1 - 2010/11/11/ PY - 2010/11/13/entrez PY - 2010/11/13/pubmed PY - 2011/4/22/medline SP - 589 EP - 602 JF - Plant physiology JO - Plant Physiol. VL - 155 IS - 1 N2 - Breeding crops with the quality of broad-spectrum disease resistance using genetic resources is one of the principal goals of crop improvement. However, the molecular mechanism of broad-spectrum resistance remains largely unknown. Here, we show that GH3-2, encoding an indole-3-acetic acid (IAA)-amido synthetase, mediates a broad-spectrum resistance to bacterial Xanthomonas oryzae pv oryzae and Xanthomonas oryzae pv oryzicola and fungal Magnaporthe grisea in rice (Oryza sativa). IAA, the major form of auxin in rice, results in rice more vulnerable to the invasion of different types of pathogens, which is at least partly due to IAA-induced loosening of the cell wall, the natural protective barrier of plant cells to invaders. X. oryzae pv oryzae, X. oryzae pv oryzicola, and M. grisea secrete IAA, which, in turn, may induce rice to synthesize its own IAA at the infection site. IAA induces the production of expansins, the cell wall-loosening proteins, and makes rice vulnerable to pathogens. GH3-2 is likely contributing to a minor quantitative trait locus for broad-spectrum resistance. Activation of GH3-2 inactivates IAA by catalyzing the formation of an IAA-amino acid conjugate, which results in the suppression of expansin genes. Thus, GH3-2 mediates basal resistance by suppressing pathogen-induced IAA accumulation. It is expected that, regulated by a pathogen-induced strong promoter, GH3-2 alone may be used for breeding rice with a broad-spectrum disease resistance. SN - 1532-2548 UR - https://www.unboundmedicine.com/medline/citation/21071600/Manipulating_broad_spectrum_disease_resistance_by_suppressing_pathogen_induced_auxin_accumulation_in_rice_ L2 - http://www.plantphysiol.org/cgi/pmidlookup?view=long&pmid=21071600 DB - PRIME DP - Unbound Medicine ER -