Abstract
Key message
Few proteomic studies have focused on the plant- Phytophthora interactions, our study provides important information regarding the use of proteomic methods for investigation of the basic mechanisms of plant- Phytophthora interactions.
Abstract
Phytophthora sojae is a fast-spreading and devastating pathogen that is responsible for root and stem rot in soybean crops worldwide. To better understand the response of soybean seedlings to the stress of infection by virulent and avirulent pathogens at the proteomic level, proteins extracted from the hypocotyls of soybean reference cultivar Williams 82 infected by P. sojae P6497 (race 2) and P7076 (race 19), respectively, were analyzed by two-dimensional gel electrophoresis. 95 protein spots were differently expressed, with 83 being successfully identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and subjected to further analysis. Based on the majority of the 83 defense-responsive proteins, and defense-related pathway genes supplemented by a quantitative reverse transcription PCR assay, a defense-related network for soybean infected by virulent and avirulent pathogens was proposed. We found reactive oxygen species (ROS) burst, the expression levels of salicylic acid (SA) signal pathway and biosynthesis of isoflavones were significantly up-regulated in the resistant soybean. Our results imply that following the P. sojae infection, ROS and SA signal pathway in soybean play the major roles in defense against P. sojae. This research will facilitate further investigation of the molecular regulatory mechanism of the defense response in soybean following infection by P. sojae.
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Abbreviations
- ACC:
-
1-Aminocyclopropane-1-carboxylic acid
- ACLY:
-
ATP citrate (pro-S)-lyase
- ACO:
-
1-Aminocyclopropane-1-carboxylate oxidase
- ACS:
-
1-Aminocyclopropane-1-carboxylate synthase
- AOC:
-
Allene oxide cyclase
- AOS:
-
Allene oxide synthase
- APX2:
-
Ascorbate peroxidase 2
- AsA:
-
Ascorbate
- Avr:
-
Avirulence
- CHI:
-
Chalcone isomerase
- CHR:
-
Chalcone reductase
- CHS:
-
Chalcone synthase
- citF:
-
Citrate lyase subunit alpha/citrate CoA-transferase
- COI1:
-
Coronatine insensitive 1
- CTR1:
-
Constitutive triple response 1
- DAB:
-
3,3′-diaminobenzidine
- DFR:
-
Bifunctional dihydroflavonol 4-reductase/flavanone 4-reductase
- EDS1:
-
Enhanced disease susceptibility 1
- EDS5:
-
Enhanced disease susceptibility 5
- EIL:
-
EIN3-like
- ERF:
-
Ethylene response factor
- EIN2:
-
Ethylene insensitive 2
- EIN3:
-
Ethylene insensitive 3
- EREBP:
-
Ethylene response element binding protein
- ET:
-
Ethylene
- ETI:
-
Effector-triggered immunity
- ETR1:
-
Ethylene resistant 1
- F3H:
-
Flavanone 3-hydroxylase
- FLS:
-
Flavonol synthase
- GR:
-
Glutathione reductase
- GRP:
-
Glycine-rich protein
- GSH:
-
Glutathione
- GSSG:
-
Glutathione disulfide
- GST24:
-
Glutathione S-transferase 24
- HID:
-
2-Hydroxyisoflavanone dehydratase
- Hpa :
-
Hyaloperonospora arabidopsidis
- HR:
-
Hypersensitive response
- I2′H:
-
Isoflavone 2′-hydroxylase
- IFR:
-
Isoflavone reductase
- IFS:
-
Isoflavone synthase
- IOMT:
-
Isoflavone 7-O-methyltransferase
- JA:
-
Jasmonic acid
- JAZ:
-
Jasmonate ZIM domain-containing protein
- MAMPs or PAMPs:
-
Microbial- or pathogen-associated molecular patterns
- MnSOD:
-
Manganese superoxide dismutase
- NAC:
-
Nascent polypeptide-associated complex
- NPR1:
-
Nonexpresser of PR genes 1
- OGDH:
-
2-Oxoglutarate dehydrogenase
- OPDA:
-
Oxophytodienoic acid
- OPR3:
-
12-Oxophytodienoate reductase 3-like
- PAD4:
-
Phytoalexin deficient 4
- PAL:
-
Phenylalanine ammonia lyase
- PAPs:
-
Purple acid phosphatases
- PCD:
-
Programmed cell death
- PDF1.2:
-
Plant defensin gene
- PRRs:
-
Pattern-recognition receptors
- PTI:
-
PAMP-triggered immunity
- rab-GDI:
-
Rab GDP dissociation inhibitor
- ROS:
-
Reactive oxygen species
- Rps genes:
-
Resistance to P. sojae
- SA:
-
Salicylic acid
- SAM:
-
S-adenosyl-l-methionine
- SAMe:
-
S-adenosyl-l-methionine
- SAR:
-
Systemic acquired resistance
- SCPs:
-
Serine carboxypeptidases
- SID2:
-
SA induction-deficient 2
- UFD:
-
Ubiquitin fusion degradation
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Acknowledgments
This work was supported in part by grants from China National Funds for Distinguished Young Scientists (31225022) and Special Fund for Agro-Scientific Research in the Public Interest (201303018) of China to Yuanchao Wang.
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The authors declare that they have no conflict of interest.
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Communicated by H. S. Judelson.
M. Jing and H. Ma contributed equally to this work.
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299_2015_1786_MOESM1_ESM.tif
Fig. S1 The phenotypes of the infection processes during incompatible and compatible interactions between P. sojae and soybean. (TIFF 1791 kb)
299_2015_1786_MOESM2_ESM.tif
Fig. S2 Representative protein spot maps of seedling hypocotyls of soybean cultivar Williams 82 which infected by Phytophthora sojae P6497 and P7076. 2-DE was performed using 1200 µg soluble protein, nonlinear 24 cm IPG strips (pH 4-7) and 12% SDS-PAGE gels for second dimension electrophoresis. Gels were stained with CBB G-250. (TIFF 692 kb)
299_2015_1786_MOESM3_ESM.tif
Fig. S3 Identified proteins involved in the metabolic pathway network. SOD, superoxide dismutase; GSSG, glutathione disulfide; GSH, glutathione; ACS, 1-aminocyclopropane-1-carboxylate synthase; OGDH, 2-oxoglutarate dehydrogenase; ACLY, ATP citrate (pro-S)-lyase; and citF, citrate lyase subunit alpha / citrate CoA-transferase. Red italics indicate the protein spots identified in this study. (TIFF 422 kb)
299_2015_1786_MOESM4_ESM.tif
Fig. S4 Histochemical identification of H2O2 by DAB staining in soybean hypocotyls. A, C: soybean hypocotyls at 12 and 24 h after inoculation with zoospores were stained by DAB; the incompatible interaction; B, D: soybean hypocotyls at 12 and 24 h after inoculation with zoospores were stained by DAB; the compatible interaction. Bar, 50 μm. (TIFF 5929 kb)
299_2015_1786_MOESM5_ESM.tif
Fig. S5 The protein–protein interaction in seedling hypocotyls from the soybean cultivar Williams 82 infected by P. sojae P6497 and P7076. Analysis of a predicted protein–protein interaction network using STRING 9.1 (http://string-db.org). Arabidopsis thaliana and a confidence level of 0.4 were used as analysis parameters. Different-colored lines represent the types of evidence used to predict the associations: gene fusion (red), neighborhood (green), co-occurrence across genomes (blue), co-expression (black), experimental (purple), association in curated databases (light blue) or co-mentioned in PubMed abstracts (yellow). Five clusters of highly interacting protein nodes are marked with circles and include the proteins involved in amino acid and nitrogen metabolism, signal transduction, redox homeostasis, carbohydrate metabolism, and secondary metabolism. (TIFF 2125 kb)
299_2015_1786_MOESM6_ESM.docx
Table S1 The descriptions of the 83 differentially expressed proteins identified by MS/MS in the seedling hypocotyls from soybean cultivar Williams 82. (DOCX 47 kb)
299_2015_1786_MOESM8_ESM.rar
Supplementary material 2 All 2-DE maps of seedling hypocotyls of soybean cultivar Williams 82, which infected by Phytophthora sojae P6497 and P7076. (RAR 17807 kb)
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Jing, M., Ma, H., Li, H. et al. Differential regulation of defense-related proteins in soybean during compatible and incompatible interactions between Phytophthora sojae and soybean by comparative proteomic analysis. Plant Cell Rep 34, 1263–1280 (2015). https://doi.org/10.1007/s00299-015-1786-9
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DOI: https://doi.org/10.1007/s00299-015-1786-9