Abstract
Key message
Arabidopsis thaliana mlo3 mutant plants are not affected in pathogen infection phenotypes but—reminiscent of mlo2 mutant plants—exhibit spontaneous callose deposition and signs of early leaf senescence.
Abstract
The family of Mildew resistance Locus O (MLO) proteins is best known for its profound effect on the outcome of powdery mildew infections: when the appropriate MLO protein is absent, the plant is fully resistant to otherwise virulent powdery mildew fungi. However, most members of the MLO protein family remain functionally unexplored. Here, we investigate Arabidopsis thaliana MLO3, the closest relative of AtMLO2, AtMLO6 and AtMLO12, which are the Arabidopsis MLO genes implicated in the powdery mildew interaction. The co-expression network of AtMLO3 suggests association of the gene with plant defense-related processes such as salicylic acid homeostasis. Our extensive analysis shows that mlo3 mutants are unaffected regarding their infection phenotype upon challenge with the powdery mildew fungi Golovinomyces orontii and Erysiphe pisi, the oomycete Hyaloperonospora arabidopsidis, and the bacterial pathogen Pseudomonas syringae (the latter both in terms of basal and systemic acquired resistance), indicating that the protein does not play a major role in the response to any of these pathogens. However, mlo3 genotypes display spontaneous callose deposition as well as signs of early senescence in 6- or 7-week-old rosette leaves in the absence of any pathogen challenge, a phenotype that is reminiscent of mlo2 mutant plants. We hypothesize that de-regulated callose deposition in mlo3 genotypes might be the result of a subtle transient aberration of salicylic acid-jasmonic acid homeostasis during development.
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Abbreviations
- bp:
-
Base pair
- CFU:
-
Colony forming units
- dpi:
-
Days post inoculation
- FW:
-
Fresh weight
- GO:
-
Gene ontology
- GUS:
-
β-glucuronidase
- Hpa :
-
Hyaloperonospra arabidopsidis
- hpi:
-
Hours post inoculation
- JA:
-
Jasmonic acid
- JA-Ile:
-
Jasmonic acid isoleucine
- MAMP:
-
Microbe-associated molecular pattern
- MS:
-
Murashige and Skoog
- Psm :
-
Pseudomonas syringae pv. maculicola
- Pst :
-
Pseudomonas syringae pv. tomato
- RH:
-
Relative humidity
- rpm:
-
rounds per minute
- RLU:
-
Relative light units
- RT-PCR:
-
Reverse transcriptase polymerase chain reaction
- SA:
-
Salicylic acid
- SAG:
-
Salicylic acid glucoside
- SAR:
-
Systemic acquired resistance
- T-DNA:
-
Transfer-DNA
- UPLC-nano ESI–MS/MS:
-
Ultrahigh-pressure liquid chromatography-tandem mass spectrometry
- YFP:
-
Yellow fluorescent protein
References
Acevedo-Garcia J, Kusch S, Panstruga R (2014) Magical mystery tour: MLO proteins in plant immunity and beyond. New Phytol 204:273–281. https://doi.org/10.1111/nph.12889
Acevedo-Garcia J, Gruner K, Reinstädler A, Kemen A, Kemen E, Cao L, Takken FLW, Reitz MU, Schäfer P, O’Connell RJ, Kusch S, Kuhn H, Panstruga R (2017a) The powdery mildew-resistant Arabidopsis mlo2 mlo6 mlo12 triple mutant displays altered infection phenotypes with diverse types of phytopathogens. Sci Rep 7:9319. https://doi.org/10.1038/s41598-017-07188-7
Acevedo-Garcia J, Spencer D, Thieron H, Reinstädler A, Hammond-Kosack KE, Phillips AL, Panstruga R (2017b) mlo-based powdery mildew resistance in hexaploid bread wheat generated by a non-transgenic TILLING approach. Plant Biotechnol J 15:367–378. https://doi.org/10.1111/pbi.12631
Alonso JM, Stepanova AN, Leisse TJ, Kim CJ, Chen H, Shinn P, Stevenson DK, Zimmerman J, Barajas P, Cheuk R, Gadrinab C, Heller C, Jeske A, Koesema E, Meyers CC, Parker H, Prednis L, Ansari Y, Choy N, Deen H, Geralt M, Hazari N, Hom E, Karnes M, Mulholland C, Ndubaku R, Schmidt I, Guzman P, Aguilar-Henonin L, Schmid M, Weigel D, Carter DE, Marchand T, Risseeuw E, Brogden D, Zeko A, Crosby WL, Berry CC, Ecker JR (2003) Genome-wide insertional mutagenesis of Arabidopsis thaliana. Science 301:653–657. https://doi.org/10.1126/science.1086391
Aoki Y, Okamura Y, Tadaka S, Kinoshita K, Obayashi T (2016) ATTED-II in 2016: a plant coexpression database towards lineage-specific coexpression. Plant Cell Physiol 57:e5. https://doi.org/10.1093/pcp/pcv165
Appiano M, Catalano D, Santillán Martínez M, Lotti C, Zheng Z, Visser RGF, Ricciardi L, Bai Y, Pavan S (2015a) Monocot and dicot MLO powdery mildew susceptibility factors are functionally conserved in spite of the evolution of class-specific molecular features. BMC Plant Biol 15:257. https://doi.org/10.1186/s12870-015-0639-6
Appiano M, Pavan S, Catalano D, Zheng Z, Bracuto V, Lotti C, Visser RGF, Ricciardi L, Bai Y (2015b) Identification of candidate MLO powdery mildew susceptibility genes in cultivated Solanaceae and functional characterization of tobacco NtMLO1. Transgenic Res 24:847–858. https://doi.org/10.1007/s11248-015-9878-4
Bailey TL, Johnson J, Grant CE, Noble WS (2015) The MEME suite. Nucleic Acids Res 43:39–49. https://doi.org/10.1093/nar/gkv416
Balcke GU, Handrick V, Bergau N, Fichtner M, Henning A, Stellmach H, Tissier A, Hause B, Frolov A (2012) An UPLC-MS/MS method for highly sensitive high-throughput analysis of phytohormones in plant tissues. Plant Methods 8:47. https://doi.org/10.1186/1746-4811-8-47
Bartsch M, Gobbato E, Bednarek P, Debey S, Schultze JL, Bautor J, Parker JE (2006) Salicylic acid-independent ENHANCED DISEASE SUSCEPTIBILITY1 signaling in Arabidopsis immunity and cell death is regulated by the monooxygenase FMO1 and the Nudix hydrolase NUDT7. Plant Cell 18:1038–1051. https://doi.org/10.1105/tpc.105.039982
Bent AF, Kunkel B, Dahlbeck D, Brown KL, Schmidt R, Giraudat J, Leung J, Staskawicz BJ (1994) RPS2 of Arabidopsis thaliana: a leucine-rich repeat class of plant disease resistance genes. Science 265:1856–1860. https://doi.org/10.1126/science.8091210
Bernsdorff F, Döring A-C, Gruner K, Schuck S, Bräutigam A, Zeier J (2016) Pipecolic acid orchestrates plant systemic acquired resistance and defense priming via salicylic acid-dependent and -independent pathways. Plant Cell 28:102–129. https://doi.org/10.1105/tpc.15.00496
Besseau S, Li J, Palva ET (2012) WRKY54 and WRKY70 co-operate as negative regulators of leaf senescence in Arabidopsis thaliana. J Exp Bot 63:2667–2679. https://doi.org/10.1093/jxb/err450
Bhat RA, Miklis M, Schmelzer E, Schulze-Lefert P, Panstruga R (2005) Recruitment and interaction dynamics of plant penetration resistance components in a plasma membrane microdomain. Proc Natl Acad Sci USA 102:3135–3140. https://doi.org/10.1073/pnas.0500012102
Bidzinski P, Noir S, Shahi S, Reinstädler A, Gratkowska DM, Panstruga R (2014) Physiological characterization and genetic modifiers of aberrant root thigmomorphogenesis in mutants of Arabidopsis thaliana MILDEW LOCUS O genes. Plant, Cell Environ 37:2738–2753. https://doi.org/10.1111/pce.12353
Birkenbihl RP, Kracher B, Roccaro M, Somssich IE (2017) Induced genome-wide binding of three Arabidopsis WRKY transcription factors during early MAMP-triggered immunity. Plant Cell 29:20–38. https://doi.org/10.1105/tpc.16.00681
Bogdanove AJ, Beer SV, Bonas U, Boucher CA, Collmer A, Coplin DL, Cornelis GR, Huang H-C, Hutcheson SW, Panopoulos NJ, van Gijsegem F (1996) Unified nomenclature for broadly conserved hrp genes of phytopathogenic bacteria. Mol Microbiol 20:681–683. https://doi.org/10.1046/j.1365-2958.1996.5731077.x
Büschges R, Hollricher K, Panstruga R, Simons G, Wolter M, Frijters A, van Daelen R, van der Lee T, Diergaarde P, Groenendijk J, Töpsch S, Vos P, Salamini F, Schulze-Lefert P (1997) The barley Mlo gene: a novel control element of plant pathogen resistance. Cell 88:695–705. https://doi.org/10.1016/S0092-8674(00)81912-1
Carella P, Wilson DC, Cameron RK (2015) Some things get better with age: differences in salicylic acid accumulation and defense signaling in young and mature Arabidopsis. Front Plant Sci 5:775. https://doi.org/10.3389/fpls.2014.00775
Carpenter AE, Jones TR, Lamprecht MR, Clarke C, Kang IH, Friman O, Guertin DA, Chang JH, Lindquist RA, Moffat J, Golland P, Sabatini DM (2006) Cell Profiler: image analysis software for identifying and quantifying cell phenotypes. Genome Biol 7:R100
Chen Z, Hartmann HA, Wu M-J, Friedman EJ, Chen J-G, Pulley M, Schulze-Lefert P, Panstruga R, Jones AM (2006) Expression analysis of the AtMLO gene family encoding plant-specific seven-transmembrane domain proteins. Plant Mol Biol 60:583–597. https://doi.org/10.1007/s11103-005-5082-x
Chen Z, Noir S, Kwaaitaal M, Hartmann HA, Wu M-J, Mudgil Y, Sukumar P, Muday G, Panstruga R, Jones AM (2009) Two seven-transmembrane domain MILDEW RESISTANCE LOCUS O proteins cofunction in Arabidopsis root thigmomorphogenesis. Plant Cell 21:1972–1991. https://doi.org/10.1105/tpc.108.062653
Consonni C, Humphry ME, Hartmann HA, Livaja M, Durner J, Westphal L, Vogel JP, Lipka V, Kemmerling B, Schulze-Lefert P, Somerville SC, Panstruga R (2006) Conserved requirement for a plant host cell protein in powdery mildew pathogenesis. Nat Genet 38:716–720. https://doi.org/10.1038/ng1806
Consonni C, Bednarek P, Humphry ME, Francocci F, Ferrari S, Harzen A, van Themaat EVL, Panstruga R (2010) Tryptophan-derived metabolites are required for antifungal defense in the Arabidopsis mlo2 mutant. Plant Physiol 152:1544–1561. https://doi.org/10.1104/pp.109.147660
Crawley MJ (2015) Statistics: an introduction using R, 2nd edn. John Wiley & Sons Ltd, London
Cui F, Wu H, Safronov O, Zhang P, Kumar R, Kollist H, Salojärvi J, Panstruga R, Overmyer K (2018) Arabidopsis MLO2 is a negative regulator of sensitivity to extracellular reactive oxygen species. Plant, Cell Environ 41:782–796. https://doi.org/10.1111/pce.13144
Deng W-L, Preston G, Collmer A, Chang C-J, Huang H-C (1998) Characterization of the hrpC and hrpRS operons of Pseudomonas syringae pathovars syringae, tomato, and glycinea and analysis of the ability of hrpF, hrpG, hrcC, hrpT, and hrpV mu. J Bacteriol 180:4523–4531
Devoto A, Piffanelli P, Nilsson I, Wallin E, Panstruga R, von Heijne G, Schulze-Lefert P (1999) Topology, subcellular localization, and sequence diversity of the Mlo family in plants. J Biol Chem 274:34993–35004. https://doi.org/10.1074/jbc.274.49.34993
Devoto A, Hartmann HA, Piffanelli P, Elliott C, Simmons C, Taramino G, Goh C-S, Cohen FE, Emerson BC, Schulze-Lefert P, Panstruga R (2003) Molecular phylogeny and evolution of the plant-specific seven-transmembrane MLO family. J Mol Evol 56:77–88. https://doi.org/10.1007/s00239-002-2382-5
Elliott C, Müller J, Miklis M, Bhat RA, Schulze-Lefert P, Panstruga R (2005) Conserved extracellular cysteine residues and cytoplasmic loop-loop interplay are required for functionality of the heptahelical MLO protein. Biochem J 385:243–254. https://doi.org/10.1042/BJ20040993
Fan J, Crooks C, Lamb C (2007) High-throughput quantitative luminescence assay of the growth in planta of Pseudomonas syringae chromosomally tagged with Photorhabdus luminescens luxCDABE. Plant J 53:393–399. https://doi.org/10.1111/j.1365-313X.2007.03303.x
Fu ZQ, Yan S, Saleh A, Wang W, Ruble J, Oka N, Mohan R, Spoel SH, Tada Y, Zheng N, Dong X (2012) NPR3 and NPR4 are receptors for the immune signal salicylic acid in plants. Nature 486:228–232. https://doi.org/10.1038/nature11162
Gao M, Wang X, Wang D, Xu F, Ding X, Zhang Z, Bi D, Cheng YT, Chen S, Li X, Zhang Y (2009) Regulation of cell death and innate immunity by two receptor-like kinases in Arabidopsis. Cell Host Microbe 6:34–44. https://doi.org/10.1016/J.CHOM.2009.05.019
Gruner K, Zeier T, Aretz C, Zeier J (2018) A critical role for Arabidopsis MILDEW RESISTANCE LOCUS O2 in systemic acquired resistance. Plant J 94:1064–1082. https://doi.org/10.1111/tpj.13920
Hansen BO, Vaid N, Musialak-Lange M, Janowski M, Mutwil M (2014) Elucidating gene function and function evolution through comparison of co-expression networks of plants. Front Plant Sci 5:394. https://doi.org/10.3389/fpls.2014.00394
Hartmann M, Zeier T, Bernsdorff F, Reichel-Deland V, Kim D, Hohmann M, Scholten N, Schuck S, Bräutigam A, Hölzel T, Ganter C, Zeier J (2018) Flavin monooxygenase-generated N-hydroxypipecolic acid is a critical element of plant systemic immunity. Cell 173:456–469.e16. https://doi.org/10.1016/J.CELL.2018.02.049
Hehl R, Norval L, Romanov A, Bülow L (2016) Boosting AthaMap database content with data from protein binding microarrays. Plant Cell Physiol 57:e4. https://doi.org/10.1093/pcp/pcv156
Holub EB, Beynon JL, Crute IR (1994) Phenotypic and genotypic characterization of interactions between isolates of Peronospora parasitica and accessions of Arabidopsis thaliana. Mol Plant-Microbe Interact 7:223–239
Hu Y, Dong Q, Yu D (2012) Arabidopsis WRKY46 coordinates with WRKY70 and WRKY53 in basal resistance against pathogen Pseudomonas syringae. Plant Sci 185–186:288–297. https://doi.org/10.1016/J.PLANTSCI.2011.12.003
Humphry ME, Bednarek P, Kemmerling B, Koh S, Stein M, Göbel U, Stüber K, Piślewska-Bednarek M, Loraine A, Schulze-Lefert P, Somerville SC, Panstruga R (2010) A regulon conserved in monocot and dicot plants defines a functional module in antifungal plant immunity. Proc Natl Acad Sci USA 107:21896–21901. https://doi.org/10.1073/pnas.1003619107
Iven T, König S, Singh S, Braus-Stromeyer SA, Bischoff M, Tietze LF, Braus GH, Lipka V, Feussner I, Dröge-Laser W (2012) Transcriptional activation and production of tryptophan-derived secondary metabolites in Arabidopsis roots contributes to the defense against the fungal vascular pathogen Verticillium longisporum. Mol Plant 5:1389–1402. https://doi.org/10.1093/MP/SSS044
Jacobs AK, Lipka V, Burton RA, Panstruga R, Strizhov N, Schulze-Lefert P, Fincher GB (2003) An Arabidopsis callose synthase, GSL5, is required for wound and papillary callose formation. Plant Cell 15:2503–2513. https://doi.org/10.1105/tpc.016097
Jarosch B, Kogel K-H, Schaffrath U (1999) The ambivalence of the barley Mlo locus: Mutations conferring resistance against powdery mildew (Blumeria graminis f. sp. hordei) enhance susceptibility to the rice blast fungus Magnaporthe grisea. Mol Plant-Microbe Interact 12:508–514
Jones DS, Kessler SA (2017) Cell type-dependent localization of MLO proteins. Plant Signal Behav 12(11):172–185. https://doi.org/10.1080/15592324.2017.1393135
Jones DS, Yuan J, Smith BE, Willoughby AC, Kumimoto EL, Kessler SA (2017) MILDEW RESISTANCE LOCUS O function in pollen tube reception is linked to its oligomerization and subcellular distribution. Plant Physiol 175:172–185. https://doi.org/10.1104/pp.17.00523
Jørgensen JH (1992) Discovery, characterization and exploitation of Mlo powdery mildew resistance in barley. Euphytica 63:141–152
Kessler SA, Shimosato-Asano H, Keinath NF, Wuest SE, Ingram G, Panstruga R, Grossniklaus U (2010) Conserved molecular components for pollen tube reception and fungal invasion. Science 330:968–971. https://doi.org/10.1126/science.1195211
Kim MC, Panstruga R, Elliott C, Müller J, Devoto A, Yoon HW, Park HC, Cho MJ, Schulze-Lefert P (2002) Calmodulin interacts with MLO protein to regulate defence against mildew in barley. Nature 416:447–451. https://doi.org/10.1038/416447a
Kim K-C, Lai Z, Fan B, Chen Z (2008) Arabidopsis WRKY38 and WRKY62 transcription factors interact with Histone Deacetylase 19 in basal defense. Plant Cell 20:2357–2371. https://doi.org/10.1105/tpc.107.055566
Kus JV, Zaton K, Sarkar R, Cameron RK (2002) Age-related resistance in Arabidopsis is a developmentally regulated defense response to Pseudomonas syringae. Plant Cell 14:479–490. https://doi.org/10.1105/TPC.010481
Kusch S, Panstruga R (2017) Mlo-based resistance: an apparently universal “weapon” to defeat powdery mildew disease. Mol Plant-Microbe Interact 30:179–189. https://doi.org/10.1094/MPMI-12-16-0255-CR
Kusch S, Pesch L, Panstruga R (2016) Comprehensive phylogenetic analysis sheds light on the diversity and origin of the MLO family of integral membrane proteins. Genome Biol Evol 8:878–895. https://doi.org/10.1093/gbe/evw036
Li J, Brader G, Kariola T, Tapio Palva E (2006) WRKY70 modulates the selection of signaling pathways in plant defense. Plant J 46:477–491. https://doi.org/10.1111/j.1365-313X.2006.02712.x
Lipka V, Dittgen J, Bednarek P, Bhat RA, Wiermer M, Stein M, Landtag J, Brandt W, Rosahl S, Scheel D, Llorente F, Molina A, Parker JE, Somerville SC, Schulze-Lefert P (2005) Pre- and postinvasion defenses both contribute to nonhost resistance in Arabidopsis. Science 310:1180–1183. https://doi.org/10.1126/science.1119409
Lorek J, Griebel T, Jones AM, Kuhn H, Panstruga R (2013) The role of Arabidopsis heterotrimeric G-protein subunits in MLO2 function and MAMP-triggered immunity. Mol Plant-Microbe Interact 26:991–1003. https://doi.org/10.1094/MPMI-03-13-0077-R
Matyash V, Liebisch G, Kurzchalia TV, Shevchenko A, Schwudke D (2008) Lipid extraction by methyl-tert-butyl ether for high-throughput lipidomics. J Lipid Res 49:1137–1146. https://doi.org/10.1194/jlr.D700041-JLR200
Meyer D, Pajonk S, Micali CO, O’Connell RJ, Schulze-Lefert P (2009) Extracellular transport and integration of plant secretory proteins into pathogen-induced cell wall compartments. Plant J 57:986–999. https://doi.org/10.1111/j.1365-313X.2008.03743.x
Mi H, Poudel S, Muruganujan A, Casagrande JT, Thomas PD (2016) PANTHER version 10: expanded protein families and functions, and analysis tools. Nucleic Acids Res 44:336–342. https://doi.org/10.1093/nar/gkv1194
Mindrinos M, Katagiri F, Yu G-L, Ausubel FM (1994) The A. thaliana disease resistance gene RPS2 encodes a protein containing a nucleotide-binding site and leucine-rich repeats. Cell 78:1089–1099. https://doi.org/10.1016/0092-8674(94)90282-8
Moreau M, Tian M, Klessig DF (2012) Salicylic acid binds NPR3 and NPR4 to regulate NPR1-dependent defense responses. Cell Res 22:1631–1633. https://doi.org/10.1038/cr.2012.100
Návarová H, Bernsdorff F, Döring A-C, Zeier J (2012) Pipecolic acid, an endogenous mediator of defense amplification and priming, is a critical regulator of inducible plant immunity. Plant Cell 24:5123–5141. https://doi.org/10.1105/tpc.112.103564
Nishimura MT, Stein M, Hou B-H, Vogel JP, Edwards H, Somerville SC (2003) Loss of a callose synthase results in salicylic acid-dependent disease resistance. Science 301:969–972
Panstruga R (2005) Serpentine plant MLO proteins as entry portals for powdery mildew fungi. Biochem Soc Trans 33:389–392. https://doi.org/10.1042/BST0330389
Parker JE, Holub EB, Frost LN, Falk A, Gunn ND, Daniels MJ (1996) Characterization of eds1, a mutation in Arabidopsis suppressing resistance to Peronospora parasitica specified by several different RPP genes. Plant Cell 8:2033–2046. https://doi.org/10.1105/tpc.8.11.2033
Peterhänsel C, Freialdenhoven A, Kurth J, Kolsch R, Schulze-Lefert P (1997) Interaction analyses of genes required for resistance responses to powdery mildew in barley reveal distinct pathways leading to leaf cell death. Plant Cell 9:1397–1409
Piffanelli P, Zhou F, Casais C, Orme J, Jarosch B, Schaffrath U, Collins NC, Panstruga R, Schulze-Lefert P (2002) The barley MLO modulator of defense and cell death is responsive to biotic and abiotic stress stimuli. Plant Physiol 129:1076–1085. https://doi.org/10.1104/pp.010954
Poudel AN, Zhang T, Kwasniewski M, Nakabayashi R, Saito K, Koo AJ (2016) Mutations in jasmonoyl-l-isoleucine-12-hydroxylases suppress multiple JA-dependent wound responses in Arabidopsis thaliana. Biochim Biophys Acta 1861:1396–1408. https://doi.org/10.1016/J.BBALIP.2016.03.006
Rietz S, Stamm A, Malonek S, Wagner S, Becker D, Medina-Escobar N, Vlot AC, Feys BJ, Niefind K, Parker JE (2011) Different roles of enhanced disease susceptibility1 (EDS1) bound to and dissociated from Phytoalexin Deficient4 (PAD4) in Arabidopsis immunity. New Phytol 191:107–119. https://doi.org/10.1111/j.1469-8137.2011.03675.x
Rose AB, Elfersi T, Parra G, Korf I (2008) Promoter-proximal introns in Arabidopsis thaliana are enriched in dispersed signals that elevate gene expression. Plant Cell 20:543–551. https://doi.org/10.1105/tpc.107.057190
Rusterucci C, Zhao Z, Haines K, Mellersh D, Neumann M, Cameron RK (2005) Age-related resistance to Pseudomonas syringae pv. tomato is associated with the transition to flowering in Arabidopsis and is effective against Peronospora parasitica. Physiol Mol Plant Pathol 66:222–231. https://doi.org/10.1016/J.PMPP.2005.08.004
Schön M, Töller A, Diezel C, Roth C, Westphal L, Wiermer M, Somssich IE (2013) Analyses of wrky18 wrky40 plants reveal critical roles of SA/EDS1 signaling and indole-glucosinolate biosynthesis for Golovinomyces orontii resistance and a loss-of resistance towards Pseudomonas syringae pv. tomato AvrRPS4. Mol Plant-Microbe Interact 26:758–767. https://doi.org/10.1094/MPMI-11-12-0265-R
Steffens NO, Galuschka C, Schindler M, Bülow L, Hehl R (2004) AthaMap: an online resource for in silico transcription factor binding sites in the Arabidopsis thaliana genome. Nucleic Acids Res 32:D368–D372. https://doi.org/10.1093/nar/gkh017
Underwood W, Somerville SC (2013) Perception of conserved pathogen elicitors at the plasma membrane leads to relocalization of the Arabidopsis PEN3 transporter. Proc Natl Acad Sci USA 110:12492–12497. https://doi.org/10.1073/pnas.1218701110
Van Bel M, Diels T, Vancaester E, Kreft L, Botzki A, Van de Peer Y, Coppens F, Vandepoele K (2018) PLAZA 4.0: an integrative resource for functional, evolutionary and comparative plant genomics. Nucleic Acids Res 46:D1190–D1196. https://doi.org/10.1093/nar/gkx1002
Wickham H (2009) ggplot2: elegant graphics for data analysis, 1st edn. Springer-Verlag, New York
Winter D, Vinegar B, Nahal H, Ammar R, Wilson GV, Provart NJ (2007) An “electronic fluorescent pictograph” browser for exploring and analyzing large-scale biological data sets. PLoS ONE 2:e718. https://doi.org/10.1371/journal.pone.0000718
Wolter M, Hollricher K, Salamini F, Schulze-Lefert P (1993) The mlo resistance alleles to powdery mildew infection in barley trigger a developmentally controlled defence mimic phenotype. Mol Gen Genet 239:122–128
Acknowledgements
This study was supported by the German Research Foundation (Deutsche Forschungsgemeinschaft; DFG) [Grant PA861/11-1 to R.P. and Grant INST 186/822-1 to I.F.]. H. arabidopsidis Noco2 was kindly provided by Jane Parker (Max Planck Institute for Plant Breeding Research, Cologne, Germany). The two P. syringae pv. maculicola strains were kindly provided by Jürgen Zeier (Heinrich Heine University, Düsseldorf, Germany). This work would not have been possible without coffee and chocolate.
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S.K. and S.T. performed the pathogen assays, K.G. did the SAR experiments. S.K. and A.R. conducted callose, senescence, GUS and osmotic stress assays. Phytohormone measurements were performed by K.Z., and K.Z. and I.F. analyzed the data. S.K. did the expression analysis, statistical testing, and plotting of the data. R.P. and S.K. designed the project and wrote the manuscript. All authors have read and approved the manuscript.
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11103_2019_877_MOESM10_ESM.xlsx
Supplementary material 10—Co-expressed genes of AtMLO1, AtMLO2, and AtMLO3 after ATTED-II release v2017.12.14 (XLSX 202 kb)
11103_2019_877_MOESM11_ESM.txt
Supplementary material 11—GO terms of the 79 genes from the common co-expression network of AtMLO2 and AtMLO3 (TXT 66 kb)
11103_2019_877_MOESM12_ESM.xlsx
Supplementary material 12—Cis-regulatory elements of the 79 genes from the common co-expression network of AtMLO2 and AtMLO3 predicted by AthaMap (XLSX 240 kb)
11103_2019_877_MOESM13_ESM.xlsx
Supplementary material 13—Cis-regulatory elements of the 79 genes from the common co-expression network of AtMLO2 and AtMLO3 predicted by MEME v5.0.4 (XLSX 41 kb)
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Kusch, S., Thiery, S., Reinstädler, A. et al. Arabidopsis mlo3 mutant plants exhibit spontaneous callose deposition and signs of early leaf senescence. Plant Mol Biol 101, 21–40 (2019). https://doi.org/10.1007/s11103-019-00877-z
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DOI: https://doi.org/10.1007/s11103-019-00877-z