Abstract
WRKYs are plant-specific transcription factors that play important roles in disease response. Here, we showed that a WRKY gene in rice, OsWRKY24, was upregulated in response to inoculation with rice blast fungus Pyricularia oryzae. Its expression was also induced by wounding. Green fluorescent protein-fused OsWRKY24 localized to nuclei in rice epidermal cells, and OsWRKY24 had transactivation activity in yeast cells. In addition, functional repression of OsWRKY24 through a chimeric repressor (OsWRKY24-SRDX) greatly increased susceptibility to P. oryzae. These results indicate that OsWRKY24 is a transcriptional activator that positively regulates disease resistance in rice.
Similar content being viewed by others
References
Bagnaresi P, Biselli C, Orrù L, Urso S, Crispino L, Abbruscato P, Piffanelli P, Lupotto E, Cattivelli L, Valè G (2012) Comparative transcriptome profiling of the early response to Magnaporthe oryzae in durable resistant vs susceptible rice (Oryza sativa L.) genotypes. PLoS One 7:e51609
Boller T, Felix G (2009) A renaissance of elicitors: perception of microbe-associated molecular patterns and danger signals by pattern-recognition receptors. Annu Rev Plant Biol 60:379–406
Cheng H, Liu H, Deng Y, Xiao J, Li X, Wang S (2015) The WRKY45-2 WRKY13 WRKY42 transcriptional regulatory cascade is required for rice resistance to fungal pathogen. Plant Physiol 167:1087–1099
Chujo T, Takai R, Akimoto-Tomiyama C, Ando S, Minami E, Nagamura Y, Kaku H, Shibuya N, Yasuda M, Nakashita H, Umemura K, Okada A, Okada K, Nojiri H, Yamane H (2007) Involvement of the elicitor-induced gene OsWRKY53 in the expression of defense-related genes in rice. Biochim Biophys Acta 1769:497–505
Chujo T, Miyamoto K, Shimogawa T, Shimizu T, Otake Y, Yokotani N, Nishizawa Y, Shibuya N, Nojiri H, Yamane H, Minami E, Okada K (2013) OsWRKY28, a PAMP-responsive transrepressor, negatively regulates innate immune responses in rice against rice blast fungus. Plant Mol Biol 82:23–37
Chujo T, Miyamoto K, Ogawa S, Masuda Y, Shimizu T, Kishi-Kaboshi M, Takahashi A, Nishizawa Y, Minami E, Nojiri H, Yamane H, Okada K (2014) Overexpression of phosphomimic mutated OsWRKY53 leads to enhanced blast resistance in rice. PLoS One 9:e98737
Eulgem T, Rushton PJ, Robatzek S, Somssich IE (2000) The WRKY superfamily of plant transcription factors. Trends Plant Sci 5:199–206
Fukushima S, Mori M, Sugano S, Takatsuji H (2016) Transcription factor WRKY62 plays a role in pathogen defense and hypoxia-responsive gene expression in rice. Plant Cell Physiol 57:2541–2551
Hiratsu K, Matsui K, Koyama T, Ohme-Takagi M (2003) Dominant repression of target genes by chimeric repressors that include the EAR motif, a repression domain, in Arabidopsis. Plant J 34:733–739
Hood EE, Gelvin SB, Melchers LS, Hoekema A (1993) New Agrobacterium helper plasmids for gene transfer to plants. Transgenic Res 2:208–218
Ishihama N, Yoshioka H (2012) Post-translational regulation of WRKY transcription factors in plant immunity. Curr Opin Plant Biol 15:431–437
Jach G, Binot E, Frings S, Luxa K, Schell J (2001) Use of red fluorescent protein from Discosoma sp. (dsRED) as a reporter for plant gene expression. Plant J 28:483–491
Jain M, Nijhawan A, Tyagi AK, Khurana JP (2006) Validation of housekeeping genes as internal control for studying gene expression in rice by quantitative real-time PCR. Biochem Biophys Res Commun 345:646–651
Kim SH, Oikawa T, Kyozuka J, Wong HL, Umemura K, Kishi-Kaboshi M, Takahashi A, Kawano Y, Kawasaki T, Shimamoto K (2012) The bHLH Rac Immunity1 (RAI1) is activated by OsRac1 via OsMAPK3 and OsMAPK6 in rice immunity. Plant Cell Physiol 53:740–754
Lan A, Huang J, Zhao W, Peng Y, Chen Z, Kang D (2013) A salicylic acid-induced rice (Oryza sativa L.) transcription factor OsWRKY77 is involved in disease resistance of Arabidopsis thaliana. Plant Biol 15:452–461
Li Q, Chen F, Sun L, Zhang Z, Yang Y, He Z (2006) Expression profiling of rice genes in early defense responses to blast and bacterial blight pathogens using cDNA microarray. Physiol Mol Plant Pathol 68:51–60
Liu X, Bai X, Wang X, Chu C (2007) OsWRKY71, a rice transcription factor, is involved in rice defense response. J Plant Physiol 164:969–979
Liu D, Chen X, Liu J, Ye J, Guo Z (2012) The rice ERF transcription factor OsERF922 negatively regulates resistance to Magnaporthe oryzae and salt tolerance. J Exp Bot 63:3899–3911
Liu J, Chen X, Liang X, Zhou X, Yang F, Liu J, He SY, Guo Z (2016) Alternative splicing of rice WRKY62 and WRKY76 transcription factor genes in pathogen defense. Plant Physiol 171:1427–1442
Mao G, Meng X, Liu Y, Zheng Z, Chen Z, Zhang S (2011) Phosphorylation of a WRKY transcription factor by two pathogen-responsive MAPKs drives phytoalexin biosynthesis in Arabidopsis. Plant Cell 23:1639–1653
Mosquera G, Giraldo MC, Khang CH, Coughlan S, Valent B (2009) Interaction transcriptome analysis identifies Magnaporthe oryzae BAS1-4 as biotrophy-associated secreted proteins in rice blast disease. Plant Cell 21:1273–1290
Nakayama A, Fukushima S, Goto S, Matsushita A, Shimono M, Sugano S, Jiang CJ, Akagi A, Yamazaki M, Inoue H, Takatsuji H (2013) Genome-wide identification of WRKY45-regulated genes that mediate benzothiadiazole-induced defense responses in rice. BMC Plant Biol 13:150
Nishizawa Y, Mochizuki S, Yokotani N, Nishmura T, Minami E (2016) Molecular and cellular analysis of the biotrophic interaction between rice and Magnaporthe oryzae—exploring situations in which the blast fungus controls the infection. Physiol Mol Plant Pathol 95:70–76
Niwa Y, Hirano T, Yoshimoto K, Shimizu M, Kobayashi H (1999) Non-invasive quantitative detection and applications of non-toxic, S65T-type green fluorescent protein in living plants. Plant J 18:455–463
Pandey SP, Somssich IE (2009) The role of WRKY transcription factors in plant immunity. Plant Physiol 150:1648–1655
Peng Y, Bartley LE, Chen X, Dardick C, Chern M, Ruan R, Canlas PE, Ronald PC (2008) OsWRKY62 is a negative regulator of basal and Xa21-mediated defense against Xanthomonas oryzae pv. oryzae in rice. Mol Plant 1:446–458
Peng X, Hu Y, Tang X, Zhou P, Deng X, Wang H, Guo Z (2012) Constitutive expression of rice WRKY30 gene increases the endogenous jasmonic acid accumulation, PR gene expression and resistance to fungal pathogens in rice. Planta 236:1485–1498
Ross CA, Liu Y, Shen QJ (2007) The WRKY gene family in rice (Oryza sativa). J Integr Plant Biol 49:827–842
Rushton PJ, Somssich IE, Ringler P, Shen QJ (2010) WRKY transcription factors. Trends Plant Sci 15:247–258
Ryu HS, Han M, Lee SK, Cho JI, Ryoo N, Heu S, Lee YH, Bhoo SH, Wang GL, Hahn TR, Jeon JS (2006) A comprehensive expression analysis of the WRKY gene superfamily in rice plants during defense response. Plant Cell Rep 25:836–847
Shimono M, Sugano S, Nakayama A, Jiang CJ, Ono K, Toki S, Takatsuji H (2007) Rice WRKY45 plays a crucial role in benzothiadiazole-inducible blast resistance. Plant Cell 19:2064–2076
Sun L, Zhang H, Li D, Huang L, Hong Y, Ding XS, Nelson RS, Zhou X, Song F (2013) Functions of rice NAC transcriptional factors, ONAC122 and ONAC131, in defense responses against Magnaporthe grisea. Plant Mol Biol 81:41–56
Talbot NJ (2003) On the trail of a cereal killer: exploring the biology of Magnaporthe grisea. Annu Rev Microbiol 57:177–202
Tanabe S, Yokotani N, Nagata T, Fujisawa Y, Jiang CJ, Abe K, Ichikawa H, Mitsuda N, Ohme-Takagi M, Nishizawa Y, Minami E (2014) Spatial regulation of defense-related genes revealed by expression analysis using dissected tissues of rice leaves inoculated with Magnaporthe oryzae. J Plant Physiol Pathol 2:1000135
Tanaka W, Toriba T, Ohmori Y, Yoshida A, Kawai A, Mayama-Tsuchida T, Ichikawa H, Mitsuda N, Ohme-Takagi M, Hirano HY (2012) The YABBY gene TONGARI-BOUSHI1 is involved in lateral organ development and maintenance of meristem organization in the rice spikelet. Plant Cell 24:80–95
Toki S, Hara N, Ono K, Onodera H, Tagiri A, Oka S, Tanaka H (2006) Early infection of scutellum tissue with Agrobacterium allows high-speed transformation of rice. Plant J 47:969–976
Wang H, Meng J, Peng X, Tang X, Zhou P, Xiang J, Deng X (2015) Rice WRKY4 acts as a transcriptional activator mediating defense responses toward Rhizoctonia solani, the causing agent of rice sheath blight. Plant Mol Biol 89:157–171
Wei T, Ou B, Li J, Zhao Y, Guo D, Zhu Y, Chen Z, Gu H, Li C, Qin G, Qu LJ (2013) Transcriptional profiling of rice early response to Magnaporthe oryzae identified OsWRKYs as important regulators in rice blast resistance. PLoS One 8:e59720
Xiao J, Cheng H, Li X, Xiao J, Xu C, Wang S (2013) Rice WRKY13 regulates cross talk between abiotic and biotic stress signaling pathways by selective binding to different cis-elements. Plant Physiol 163:1868–1882
Xie Z, Zhang ZL, Zou X, Huang J, Ruas P, Thompson D, Shen QJ (2005) Annotations and functional analyses of the rice WRKY gene superfamily reveal positive and negative regulators of abscisic acid signaling in aleurone cells. Plant Physiol 137:176–189
Yokotani N, Sato Y, Tanabe S, Chujo T, Shimizu T, Okada K, Yamane H, Shimono M, Sugano S, Takatsuji H, Kaku H, Minami E, Nishizawa Y (2013) WRKY76 is a rice transcriptional repressor playing opposite roles in blast disease resistance and cold stress tolerance. J Exp Bot 64:5085–5097
Yokotani N, Tsuchida-Mayama T, Ichikawa H, Mitsuda N, Ohme-Takagi M, Kaku H, Minami E, Nishizawa Y (2014) OsNAC111, a blast disease-responsive transcription factor in rice, positively regulates the expression of defense-related genes. Mol Plant Microbe Interact 27:1027–1034
Zhang J, Peng Y, Guo Z (2008) Constitutive expression of pathogen-inducible OsWRKY31 enhances disease resistance and affects root growth and auxin response in transgenic rice plants. Cell Res 18:508–521
Zhang ZL, Shin M, Zou X, Huang J, Ho TH, Shen QJ (2009) A negative regulator encoded by a rice WRKY gene represses both abscisic acid and gibberellins signaling in aleurone cells. Plant Mol Biol 70:139–151
Acknowledgements
We thank former Prof. H. Naitoh (Akita Prefectural University, Japan) for providing P. oryzae isolate P91-15B. We also thank Dr. N. Ishii-Minami, Ms. E. Nakajima, Ms. M. Kouzai, and Mr. K. Nakajima for daily technical assistance and Dr. T. Tsuchida-Mayama, Dr. K. Abe, Ms. K. Iida-Okada, and Mr. A. Horikawa of NIAS, and Mr. T. Ishizuka and Ms. Y. Takiguchi of AIST and Mr. K. Sato of GreenSogna Inc. for generating SRDX rice lines. Japanese isolate Ina86-137 of P. oryzae (MAFF 101511) was supplied by NARO Genebank in Tsukuba, Japan. This research was supported by a grant to YN from the Japan Society for the Promotion of Science initiated by the Council for Science and Technology Policy (GS028) and also in part by grants from the Ministry of Agriculture, Forestry and Fisheries (Genomics for Agricultural Innovation, AMR0001 to HI and AMR0004 to MO-T and NM).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yokotani, N., Shikata, M., Ichikawa, H. et al. OsWRKY24, a blast-disease responsive transcription factor, positively regulates rice disease resistance. J Gen Plant Pathol 84, 85–91 (2018). https://doi.org/10.1007/s10327-018-0768-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10327-018-0768-5