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Cao J, Chen Y, Wang H, Jiang Y, Wu J. Effects of long-term cultivation on spatial-temporal variation of soil nitrogen and phosphorus: a case study in Shaanxi Province, China. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1439. [PMID: 37943344 DOI: 10.1007/s10661-023-12038-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 10/23/2023] [Indexed: 11/10/2023]
Abstract
Investigating the spatial-temporal variation of soil nitrogen (N) and phosphorus (P) is essential to determine the balance between increased food production and environmental protection. In this study, a total of 705 soil samples were collected at depths of 0-20 cm in 2017 and analyzed for laboratory tests of soil N and P. The results showed that from the 1980s to 2017, the total nitrogen (TN), available nitrogen (AN), and available phosphorus (AP) contents of farmland soils in Shaanxi Province increased by 33%, 17%, and 199%, respectively, while the total phosphorus (TP) content decreased by 40%. The best-fit model for spatial interpolation of soil TP and AP in Shaanxi Province was the exponential model (R2 = 0.92 and 0.95); the Gaussian model was the best-fit model for spatial interpolation of soil TN and AN (R2 = 0.98 and 0.96). The spatial distribution characteristics of soil TN, AN, TP, and AP were consistent, all being higher in southern Shaanxi than in northern Shaanxi. The value of N:P* ratio (molar ratio) of cultivated soils in Shaanxi Province is 2.9, which is lower than the Chinese average (N:P* = 5.0). Based on the spatial-temporal variations of soil N and P contents between regions, it is recommended that fertilization should be strictly controlled in central and southern Shaanxi and optimized in northern Shaanxi to improve ground strength.
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Affiliation(s)
- Jing Cao
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Yanxiang Road 97, Xi'an, 710061, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiping Chen
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Yanxiang Road 97, Xi'an, 710061, China.
| | - Hong Wang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Yanxiang Road 97, Xi'an, 710061, China
| | - Yao Jiang
- Xi'an Institute for Innovative Earth Environment Research, Xi'an, 710061, China
| | - Junhua Wu
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Yanxiang Road 97, Xi'an, 710061, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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Zhou Y, Zou Z, Wang M, Wang Y, Li J, Qiu L, Cheng Y, Dai Z. Biochar and nano-ferric oxide synergistically alleviate cadmium toxicity of muskmelon. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:57945-57959. [PMID: 36971939 DOI: 10.1007/s11356-023-26369-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 03/06/2023] [Indexed: 05/10/2023]
Abstract
Cadmium is toxic to plants. The accumulation of cadmium in edible plants such as muskmelon may affect the safe production of crops and result in human health problem. Thus effective measures are urgently needed for soil remediation. This work aims to investigate the effects of nano-ferric oxide and biochar alone or mixture on muskmelon under cadmium stress. The results of growth and physiological indexes showed that compared with the application of cadmium alone, the composite treatment (biochar and nano-ferric oxide) decreased malondialdehyde content by 59.12% and ascorbate peroxidase activity increased by 276.6%. Their addition can increase the stress resistance of plants. The results of soil analysis and cadmium content determination in plants showed that the composite treatment was beneficial to reduce the cadmium content in various parts of muskmelon. In the presence of high concentration of cadmium, the Target Hazard Quotient value of peel and flesh of muskmelon in the composite treatment was less than 1, which means the edible risk was greatly reduced. Furthermore, the addition of composite treatment increased the content of effective components; the contents of polyphenols, flavonoids, and saponins in the flesh of the compound treatment were increased by 99.73%, 143.07%, and 18.78% compared with the cadmium treatment. The results provide a technical reference for the further application of biochar combined with nano-ferric oxide in the field of soil heavy metal remediation, and provide a theoretical basis for further research on reducing the toxicity of cadmium to plants and improving the edible quality of crops.
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Affiliation(s)
- Ying Zhou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Zhengkang Zou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Mengfei Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Yunqiang Wang
- Institute of Economic Crops, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
- Vegetable Germplasm Innovation and Genetic Improvement Key Laboratory of Hubei Province, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
| | - Junli Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China.
| | - Lingzhi Qiu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Yuxuan Cheng
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, People's Republic of China
| | - Zhaoyi Dai
- Institute of Economic Crops, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
- Vegetable Germplasm Innovation and Genetic Improvement Key Laboratory of Hubei Province, Hubei Academy of Agricultural Science, Wuhan, 430064, People's Republic of China
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Marieshwari BN, Bhuvaragavan S, Sruthi K, Mullainadhan P, Janarthanan S. Insect phenoloxidase and its diverse roles: melanogenesis and beyond. J Comp Physiol B 2023; 193:1-23. [PMID: 36472653 DOI: 10.1007/s00360-022-01468-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 12/12/2022]
Abstract
Insect life on earth is greatly diversified despite being exposed to several infectious agents due to their diverse habitats and ecological niche. One of the major factors responsible for their successful establishment is having a powerful innate immune system. The most common and effective method used by insects in recognizing pathogen and non-self-substances is the melanization process among others. The key enzyme involved in melanin biosynthesis is the copper containing humoral defense enzyme, phenoloxidase (PO). This review focused on understanding about PO and that had been in research for nearly a century. The review elaborates about evolutionary significance of PO in arthropods, its relationship with mammalian tyrosinases, various substrates, activators and inhibitors involved in the activation of phenoloxidase cascade, as it requires an integrated system of activation that vary among insect species. The enzyme also plays a vital role in insect immunity by involving in several other immune functions like sclerotization, wound healing, opsonization, encapsulation and nodule formation. Further, gene knock down or knock out of PO genes and inhibition of PO-melanization cascade by several mechanisms can also be considered as promising future alternative to control serious pests by making them highly susceptible to any targeted attack.
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Affiliation(s)
| | | | - Kannan Sruthi
- Department of Zoology, University of Madras, Guindy Campus, Chennai, 600025, India
| | | | - Sundaram Janarthanan
- Department of Zoology, University of Madras, Guindy Campus, Chennai, 600025, India.
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Wang ZH, Hu RM, Ye XQ, Huang JH, Chen XX, Shi M. Laccase 1 gene from Plutella xylostella (PxLac1) and its functions in humoral immune response. JOURNAL OF INSECT PHYSIOLOGY 2018; 107:197-203. [PMID: 29626507 DOI: 10.1016/j.jinsphys.2018.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 04/01/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
Laccase (EC 1.10.3.2) is a phenoloxidase found in many insect species. The Laccase 1 gene from Plutella xylostella (PxLac1) was cloned, and its expression patterns and functions were determined using qPCR and RNAi methods. The results showed that the expression levels of PxLac1 were consistently high in all larval stages, and the most abundant was in the midgut during the 4th instar stage. Moreover, the expression of PxLac1 was up-regulated in response to bacterial infection, and decreased 24 h after being parasitized by Cotesia vestalis. Further analyses indicated that the effect of parasitization on PxLac1 was induced by active C. vestalis Bracovirus (CvBV). Haemocyte-free hemolymph phenoloxidase (PO) activity was suppressed when PxLac1 was treated with RNAi. Our results provide evidence for a connection between the Laccase 1 gene and insect immunity, and revealed that parasitoid polydnavirus suppresses host PO activity via PxLac1 regulation.
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Affiliation(s)
- Ze-Hua Wang
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China
| | - Rong-Min Hu
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China
| | - Xi-Qian Ye
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China
| | - Jian-Hua Huang
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China
| | - Xue-Xin Chen
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; State Key Lab of Rice Biology, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Min Shi
- Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China; Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
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Shafeeq T, UlAbdin Z, Lee KY. Induction of stress- and immune-associated genes in the Indian meal moth Plodia interpunctella against envenomation by the ectoparasitoid Bracon hebetor. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2017; 96:e21405. [PMID: 28730731 DOI: 10.1002/arch.21405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Envenomation is an important process in parasitism by parasitic wasps; it suppresses the immune and development of host insects. However, the molecular mechanisms of host responses to envenomation are not yet clear. This study aimed to determine the transcription-level responses of the Indian meal moth Plodia interpunctella against envenomation of the ectoparasitoid Bracon hebetor. Quantitative real-time reverse-transcription PCR was used to determine the transcriptional changes of 13 selected genes, which are associated with development, metabolism, stress, or immunity, in the feeding and wandering fifth instar larvae over a 4-day period after envenomation. The effects of envenomation on the feeding-stage larvae were compared with those of starvation in the transcriptional levels of the 13 genes. Most selected genes were altered in their expression by either envenomation or starvation. In particular, a heat shock protein, hsp70, was highly upregulated in envenomated larvae in both the feeding and wandering stages as well as in starved larvae. Further, some genes were upregulated by envenomation in a stage-specific manner. For example, hsp25 was upregulated after envenomation in the feeding larvae, but hsp90 and an immune-associated gene, hemolin, were upregulated in the wandering larvae. However, both envenomation and starvation resulted in the downregulation of genes associated with development and metabolism. Taken together, P. interpunctella upregulated stress- and immune-responsive genes, but downregulated genes associated with development and metabolism after envenomation. This study provides important information for understanding the molecular mechanisms of host responses to parasitism.
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Affiliation(s)
- Tahir Shafeeq
- Division of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
- Institute of Plant Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Zain UlAbdin
- Department of Entomology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Kyeong-Yeoll Lee
- Division of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea
- Institute of Plant Medicine, Kyungpook National University, Daegu, Republic of Korea
- Institute of Agricultural Science and Technology, Kyungpook National University, Daegu, Republic of Korea
- Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea
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Qi L, Fang Q, Zhao L, Xia H, Zhou Y, Xiao J, Li K, Ye G. De Novo Assembly and Developmental Transcriptome Analysis of the Small White Butterfly Pieris rapae. PLoS One 2016; 11:e0159258. [PMID: 27428371 PMCID: PMC4948883 DOI: 10.1371/journal.pone.0159258] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 06/29/2016] [Indexed: 12/15/2022] Open
Abstract
The small white butterfly Pieris rapae is one of the most destructive pests of Brassicaceae. Yet little is understood about its genes involved in development. To facilitate research on P. rapae, we sequenced the transcriptome of P. rapae during six developmental stages, including the egg, three larval stages, the pupa, and the adult. In total, 240 million high-quality reads were obtained. De novo assembly generated 96,069 unigenes with an average length of 1353 nt. Of these, 31,629 unigenes had homologs as determined by a blastx search against the NR database with a cut-off e-value of 10−5. Clusters of Orthologous Groups of proteins (COG), Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were conducted to functionally annotate those genes. Then, 849 genes involved in seven canonical development signaling pathway were identified, including dozens of key genes such as Hippo, Notch, and JAK2. A total of 21,883 differentially expressed (cut-off of 2-fold) unigenes were detected across the developmental stages, most of which were found between the egg and first larval stages. Interestingly, only 34 differentially expressed unigenes, most of which are cuticle protein related genes, were detected with a cut-off of 210-fold. Furthermore, we identified 32 heat shock protein (Hsp) genes that were expressed with complete open reading frames. Based on phylogenetic trees of the Hsp genes, we found that Hsp genes with close evolutionary relationships had similar expression pattern. Additionally, partial pattern recognition receptors genes were found to be developmental regulated. This study provides comprehensive sequence resources for P. rapae and numerous differential expressed genes, and these findings will lay the foundation for future functional genomics studies on this species.
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Affiliation(s)
- Lixing Qi
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Qi Fang
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | - Lei Zhao
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Hao Xia
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Yuxun Zhou
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Junhua Xiao
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Kai Li
- College of Chemistry, Chemical Engineering, and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Gongyin Ye
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
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Transcriptomic Analysis of Musca domestica to Reveal Key Genes of the Prophenoloxidase-Activating System. G3-GENES GENOMES GENETICS 2015; 5:1827-41. [PMID: 26156588 PMCID: PMC4555219 DOI: 10.1534/g3.115.016899] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The proPO system regulates melanization in arthropods. However, the genes that are involved in the proPO system in housefly Musca domestica remain unclear. Thus, this study analyzed the combined transcriptome obtained from M. domestica larvae, pupae, and adults that were either normal or bacteria-challenged by an Escherichia coli and Staphylococcus aureus mixture. A total of 54,821,138 clean reads (4.93 Gb) were yielded by Illumina sequencing, which were de novo assembled into 89,842 unigenes. Of the 89,842 unigenes, based on a similarity search with known genes in other insects, 24 putative genes related to the proPO system were identified. Eight of the identified genes encoded for peptidoglycan recognition receptors, two encoded for prophenoloxidases, three encoded for prophenoloxidase-activating enzymes, and 11 encoded for serine proteinase inhibitors. The expression levels of these identified genes were investigated by qRT-PCR assay, which were consistent with expected activation process of the proPO system, and their activation functions were confirmed by the measurement of phenoloxidase activity in bacteria-infected larvae after proPO antibody blockage, suggesting these candidate genes might have potentially different roles in the activation of proPO system. Collectively, this study has provided the comprehensive transcriptomic data of an insect and some fundamental basis toward achieving understanding of the activation mechanisms and immune functions of the proPO system in M. domestica.
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Alvarez JV, Chung JS. Cloning of prophenoloxidase from hemocytes of the blue crab, Callinectes sapidus and its expression and enzyme activity during the molt cycle. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1349-1358. [PMID: 23968691 DOI: 10.1016/j.fsi.2013.07.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 07/26/2013] [Accepted: 07/28/2013] [Indexed: 06/02/2023]
Abstract
The arthropods cuticle undergoes dramatic morphological and biochemical changes from being soft to hardness through each molting process. Prophenoloxidase (PPO) known as a key enzyme in the arthropod innate immune system involved in the melanization reaction, has been related with the initial shell-hardening process, specifically in the sclerotization of the protein matrix in the new cuticle. Since hemocytes have been reported as the main PPO source in arthropods, the transport of hemocyte PPO into the newly laid, soft cuticle has been proposed for shell-hardening occurring during and immediately after ecdysis. In order to define the role of hemocyte PPO in the shell-hardening of crustaceans, the full-length cDNA sequence (2806 nt) of hemocytes PPO of the blue crab Callinectes sapidus (CasPPO-hemo) is isolated using degenerate PCR and 5'-3' RACE. CasPPO-hemo encodes a putative PPO (672 aa) showing three hemocyanin domains: N, M, and C in order and two copper binding sites (CuA & CuB). The sequence analysis identifies the putative CasPPO-hemo as zymogen which requires the cleavage at the N-terminus for its activation. Hemocyte extract (CasHLS) contains the PO, the activity of which depends on the in vitro activation of trypsin. The expression levels of CasPPO-hemo are kept constant during the molt cycle. The increase in the number of hemocytes at early premolt correlates with the elevated PO activity, while at late premolt, the increment in hemocyte numbers does not reflect on the PO activity. The functional importance of the changes in the levels of CasHLS-PO activity during molt cycle is discussed in relation to cuticle hardening process.
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Affiliation(s)
- Javier V Alvarez
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, Columbus Center, 701 E. Pratt Street, Baltimore, MD 21202, USA
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Zhu JY, Yang P, Zhang Z, Wu GX, Yang B. Transcriptomic immune response of Tenebrio molitor pupae to parasitization by Scleroderma guani. PLoS One 2013; 8:e54411. [PMID: 23342153 PMCID: PMC3544796 DOI: 10.1371/journal.pone.0054411] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Accepted: 12/13/2012] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Host and parasitoid interaction is one of the most fascinating relationships of insects, which is currently receiving an increasing interest. Understanding the mechanisms evolved by the parasitoids to evade or suppress the host immune system is important for dissecting this interaction, while it was still poorly known. In order to gain insight into the immune response of Tenebrio molitor to parasitization by Scleroderma guani, the transcriptome of T. molitor pupae was sequenced with focus on immune-related gene, and the non-parasitized and parasitized T. molitor pupae were analyzed by digital gene expression (DGE) analysis with special emphasis on parasitoid-induced immune-related genes using Illumina sequencing. METHODOLOGY/PRINCIPAL FINDINGS In a single run, 264,698 raw reads were obtained. De novo assembly generated 71,514 unigenes with mean length of 424 bp. Of those unigenes, 37,373 (52.26%) showed similarity to the known proteins in the NCBI nr database. Via analysis of the transcriptome data in depth, 430 unigenes related to immunity were identified. DGE analysis revealed that parasitization by S. guani had considerable impacts on the transcriptome profile of T. molitor pupae, as indicated by the significant up- or down-regulation of 3,431 parasitism-responsive transcripts. The expression of a total of 74 unigenes involved in immune response of T. molitor was significantly altered after parasitization. CONCLUSIONS/SIGNIFICANCE obtained T. molitor transcriptome, in addition to establishing a fundamental resource for further research on functional genomics, has allowed the discovery of a large group of immune genes that might provide a meaningful framework to better understand the immune response in this species and other beetles. The DGE profiling data provides comprehensive T. molitor immune gene expression information at the transcriptional level following parasitization, and sheds valuable light on the molecular understanding of the host-parasitoid interaction.
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Affiliation(s)
- Jia-Ying Zhu
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming, China.
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