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Enhanced disease resistance and hypersensitivity to BTH by introduction of an NH1/OsNPR1 paralog.
Plant Biotechnol J. 2011 Feb; 9(2):205-15.PB

Abstract

Non-expresser of pathogenesis-related genes 1 (NPR1) is the master regulator of salicylic acid-mediated systemic acquired resistance. Over-expression of Arabidopsis NPR1 and rice NH1 (NPR1 homolog1)/OsNPR1 in rice results in enhanced resistance. While there are four rice NPR1 paralogs in the rice genome, none have been demonstrated to function in disease resistance. To study rice NPR1 paralog 3, we introduced constructs into rice and tested for effects on resistance to infection by Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial blight. While over-expression of NH3 using the maize ubiquitin-1 promoter failed to enhance resistance, introduction of an extra copy of NH3 driven by its own promoter (nNT-NH3) resulted in clear, enhanced resistance. Progeny analysis confirms that the enhanced resistance phenotype, measured by Xoo-induced lesion length, is associated with the NH3 transgene. Bacterial growth curve analysis indicates that bacterial population levels are reduced 10-fold in nNT-NH3 lines compared to control rice lines. The transgenic plants exhibit higher sensitivity to benzothiadiazole (BTH) and 2,6-dichloroisonicotinic acid (INA) treatment as measured by increased cell death. Expression analysis of pathogenesis-related (PR) genes showed that nNT-NH3 plants display greatly enhanced induction of PR genes only after treatment with BTH. Our study demonstrates an alternative method to employ a regulatory protein to enhance plant defence. This approach avoids using undesirable constitutive, high-level expression and may prove to be more practical for engineering resistance.

Authors+Show Affiliations

Department of Plant Pathology, University of California, Davis, CA, USA.No 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
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

20561248

Citation

Bai, Wei, et al. "Enhanced Disease Resistance and Hypersensitivity to BTH By Introduction of an NH1/OsNPR1 Paralog." Plant Biotechnology Journal, vol. 9, no. 2, 2011, pp. 205-15.
Bai W, Chern M, Ruan D, et al. Enhanced disease resistance and hypersensitivity to BTH by introduction of an NH1/OsNPR1 paralog. Plant Biotechnol J. 2011;9(2):205-15.
Bai, W., Chern, M., Ruan, D., Canlas, P. E., Sze-To, W. H., & Ronald, P. C. (2011). Enhanced disease resistance and hypersensitivity to BTH by introduction of an NH1/OsNPR1 paralog. Plant Biotechnology Journal, 9(2), 205-15. https://doi.org/10.1111/j.1467-7652.2010.00544.x
Bai W, et al. Enhanced Disease Resistance and Hypersensitivity to BTH By Introduction of an NH1/OsNPR1 Paralog. Plant Biotechnol J. 2011;9(2):205-15. PubMed PMID: 20561248.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced disease resistance and hypersensitivity to BTH by introduction of an NH1/OsNPR1 paralog. AU - Bai,Wei, AU - Chern,Mawsheng, AU - Ruan,Deling, AU - Canlas,Patrick E, AU - Sze-To,Wing Hoi, AU - Ronald,Pamela C, PY - 2010/6/22/entrez PY - 2010/6/22/pubmed PY - 2011/5/12/medline SP - 205 EP - 15 JF - Plant biotechnology journal JO - Plant Biotechnol. J. VL - 9 IS - 2 N2 - Non-expresser of pathogenesis-related genes 1 (NPR1) is the master regulator of salicylic acid-mediated systemic acquired resistance. Over-expression of Arabidopsis NPR1 and rice NH1 (NPR1 homolog1)/OsNPR1 in rice results in enhanced resistance. While there are four rice NPR1 paralogs in the rice genome, none have been demonstrated to function in disease resistance. To study rice NPR1 paralog 3, we introduced constructs into rice and tested for effects on resistance to infection by Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial blight. While over-expression of NH3 using the maize ubiquitin-1 promoter failed to enhance resistance, introduction of an extra copy of NH3 driven by its own promoter (nNT-NH3) resulted in clear, enhanced resistance. Progeny analysis confirms that the enhanced resistance phenotype, measured by Xoo-induced lesion length, is associated with the NH3 transgene. Bacterial growth curve analysis indicates that bacterial population levels are reduced 10-fold in nNT-NH3 lines compared to control rice lines. The transgenic plants exhibit higher sensitivity to benzothiadiazole (BTH) and 2,6-dichloroisonicotinic acid (INA) treatment as measured by increased cell death. Expression analysis of pathogenesis-related (PR) genes showed that nNT-NH3 plants display greatly enhanced induction of PR genes only after treatment with BTH. Our study demonstrates an alternative method to employ a regulatory protein to enhance plant defence. This approach avoids using undesirable constitutive, high-level expression and may prove to be more practical for engineering resistance. SN - 1467-7652 UR - https://www.unboundmedicine.com/medline/citation/20561248/Enhanced_disease_resistance_and_hypersensitivity_to_BTH_by_introduction_of_an_NH1/OsNPR1_paralog_ L2 - https://doi.org/10.1111/j.1467-7652.2010.00544.x DB - PRIME DP - Unbound Medicine ER -