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OsEDR1 negatively regulates rice bacterial resistance via activation of ethylene biosynthesis.
Plant Cell Environ 2011; 34(2):179-91PC

Abstract

Rice OsEDR1 is a sequence ortholog of Arabidopsis EDR1. However, its molecular function is unknown. We show here that OsEDR1-suppressing/knockout (KO) plants, which developed spontaneous lesions on the leaves, have enhanced resistance to Xanthomonas oryzae pv. oryzae (Xoo) causing bacterial blight disease. This resistance was associated with increased accumulation of salicylic acid (SA) and jasmonic acid (JA), induced expression of SA- and JA-related genes and suppressed accumulation of 1-aminocyclopropane-1-carboxylic acid (ACC), the direct precursor of ethylene, and expression of ethylene-related genes. OsEDR1-KO plants also showed suppressed production of ethylene. Knockout of OsEDR1 suppressed the ACC synthase (ACS) gene family, which encodes the rate-limiting enzymes of ethylene biosynthesis by catalysing the formation of ACC. The lesion phenotype and enhanced bacterial resistance of the OsEDR1-KO plants was partly complemented by the treatment with ACC. ACC treatment was associated with decreased SA and JA biosynthesis in OsEDR1-KO plants. In contrast, aminoethoxyvinylglycine, the inhibitor of ethylene biosynthesis, promoted expression of SA and JA synthesis-related genes in OsEDR1-KO plants. These results suggest that ethylene is a negative signalling molecule in rice bacterial resistance. In the rice-Xoo interaction, OsEDR1 transcriptionally promotes the synthesis of ethylene that, in turn, suppresses SA- and JA-associated defence signalling.

Authors+Show Affiliations

National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China.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

Language

eng

PubMed ID

20807375

Citation

Shen, Xiangling, et al. "OsEDR1 Negatively Regulates Rice Bacterial Resistance Via Activation of Ethylene Biosynthesis." Plant, Cell & Environment, vol. 34, no. 2, 2011, pp. 179-91.
Shen X, Liu H, Yuan B, et al. OsEDR1 negatively regulates rice bacterial resistance via activation of ethylene biosynthesis. Plant Cell Environ. 2011;34(2):179-91.
Shen, X., Liu, H., Yuan, B., Li, X., Xu, C., & Wang, S. (2011). OsEDR1 negatively regulates rice bacterial resistance via activation of ethylene biosynthesis. Plant, Cell & Environment, 34(2), pp. 179-91. doi:10.1111/j.1365-3040.2010.02219.x.
Shen X, et al. OsEDR1 Negatively Regulates Rice Bacterial Resistance Via Activation of Ethylene Biosynthesis. Plant Cell Environ. 2011;34(2):179-91. PubMed PMID: 20807375.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - OsEDR1 negatively regulates rice bacterial resistance via activation of ethylene biosynthesis. AU - Shen,Xiangling, AU - Liu,Hongbo, AU - Yuan,Bin, AU - Li,Xianghua, AU - Xu,Caiguo, AU - Wang,Shiping, Y1 - 2010/10/29/ PY - 2010/9/3/entrez PY - 2010/9/3/pubmed PY - 2012/3/16/medline SP - 179 EP - 91 JF - Plant, cell & environment JO - Plant Cell Environ. VL - 34 IS - 2 N2 - Rice OsEDR1 is a sequence ortholog of Arabidopsis EDR1. However, its molecular function is unknown. We show here that OsEDR1-suppressing/knockout (KO) plants, which developed spontaneous lesions on the leaves, have enhanced resistance to Xanthomonas oryzae pv. oryzae (Xoo) causing bacterial blight disease. This resistance was associated with increased accumulation of salicylic acid (SA) and jasmonic acid (JA), induced expression of SA- and JA-related genes and suppressed accumulation of 1-aminocyclopropane-1-carboxylic acid (ACC), the direct precursor of ethylene, and expression of ethylene-related genes. OsEDR1-KO plants also showed suppressed production of ethylene. Knockout of OsEDR1 suppressed the ACC synthase (ACS) gene family, which encodes the rate-limiting enzymes of ethylene biosynthesis by catalysing the formation of ACC. The lesion phenotype and enhanced bacterial resistance of the OsEDR1-KO plants was partly complemented by the treatment with ACC. ACC treatment was associated with decreased SA and JA biosynthesis in OsEDR1-KO plants. In contrast, aminoethoxyvinylglycine, the inhibitor of ethylene biosynthesis, promoted expression of SA and JA synthesis-related genes in OsEDR1-KO plants. These results suggest that ethylene is a negative signalling molecule in rice bacterial resistance. In the rice-Xoo interaction, OsEDR1 transcriptionally promotes the synthesis of ethylene that, in turn, suppresses SA- and JA-associated defence signalling. SN - 1365-3040 UR - https://www.unboundmedicine.com/medline/citation/20807375/OsEDR1_negatively_regulates_rice_bacterial_resistance_via_activation_of_ethylene_biosynthesis_ L2 - https://doi.org/10.1111/j.1365-3040.2010.02219.x DB - PRIME DP - Unbound Medicine ER -