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Shintani M, Tamura K, Bono H. Meta-analysis of public RNA sequencing data of abscisic acid-related abiotic stresses in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2024; 15:1343787. [PMID: 38584943 PMCID: PMC10995227 DOI: 10.3389/fpls.2024.1343787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/07/2024] [Indexed: 04/09/2024]
Abstract
Abiotic stresses such as drought, salinity, and cold negatively affect plant growth and crop productivity. Understanding the molecular mechanisms underlying plant responses to these stressors is essential for stress tolerance in crops. The plant hormone abscisic acid (ABA) is significantly increased upon abiotic stressors, inducing physiological responses to adapt to stress and regulate gene expression. Although many studies have examined the components of established stress signaling pathways, few have explored other unknown elements. This study aimed to identify novel stress-responsive genes in plants by performing a meta-analysis of public RNA sequencing (RNA-Seq) data in Arabidopsis thaliana, focusing on five ABA-related stress conditions (ABA, Salt, Dehydration, Osmotic, and Cold). The meta-analysis of 216 paired datasets from five stress conditions was conducted, and differentially expressed genes were identified by introducing a new metric, called TN [stress-treated (T) and non-treated (N)] score. We revealed that 14 genes were commonly upregulated and 8 genes were commonly downregulated across all five treatments, including some that were not previously associated with these stress responses. On the other hand, some genes regulated by salt, dehydration, and osmotic treatments were not regulated by exogenous ABA or cold stress, suggesting that they may be involved in the plant response to dehydration independent of ABA. Our meta-analysis revealed a list of candidate genes with unknown molecular mechanisms in ABA-dependent and ABA-independent stress responses. These genes could be valuable resources for selecting genome editing targets and potentially contribute to the discovery of novel stress tolerance mechanisms and pathways in plants.
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Affiliation(s)
- Mitsuo Shintani
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Keita Tamura
- Genome Editing Innovation Center, Hiroshima University, Higashi-Hiroshima, Japan
| | - Hidemasa Bono
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
- Genome Editing Innovation Center, Hiroshima University, Higashi-Hiroshima, Japan
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2
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Oliveira-Garcia E, Yan X, Oses-Ruiz M, de Paula S, Talbot NJ. Effector-triggered susceptibility by the rice blast fungus Magnaporthe oryzae. THE NEW PHYTOLOGIST 2024; 241:1007-1020. [PMID: 38073141 DOI: 10.1111/nph.19446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/08/2023] [Indexed: 01/12/2024]
Abstract
Rice blast, the most destructive disease of cultivated rice world-wide, is caused by the filamentous fungus Magnaporthe oryzae. To cause disease in plants, M. oryzae secretes a diverse range of effector proteins to suppress plant defense responses, modulate cellular processes, and support pathogen growth. Some effectors can be secreted by appressoria even before host penetration, while others accumulate in the apoplast, or enter living plant cells where they target specific plant subcellular compartments. During plant infection, the blast fungus induces the formation of a specialized plant structure known as the biotrophic interfacial complex (BIC), which appears to be crucial for effector delivery into plant cells. Here, we review recent advances in the cell biology of M. oryzae-host interactions and show how new breakthroughs in disease control have stemmed from an increased understanding of effector proteins of M. oryzae are deployed and delivered into plant cells to enable pathogen invasion and host susceptibility.
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Affiliation(s)
- Ely Oliveira-Garcia
- Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Xia Yan
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich, NR4 7UH, UK
| | - Miriam Oses-Ruiz
- IMAB, Public University of Navarre (UPNA), Campus Arrosadia, 31006, Pamplona, Navarra, Spain
| | - Samuel de Paula
- Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Nicholas J Talbot
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich, NR4 7UH, UK
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3
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Rennberger G, Branham SE, Wechter WP. Genome-Wide Association Study of Resistance to Pseudomonas syringae in the USDA Collection of Citrullus amarus. PLANT DISEASE 2023; 107:3464-3474. [PMID: 37129351 DOI: 10.1094/pdis-04-23-0795-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Pseudomonas leaf spot (PLS), caused by Pseudomonas syringae pv. syringae, is an emerging disease of watermelon in the United States with the potential to severely reduce yield under humid conditions. The genetic basis of resistance to this disease is not known and no resistant germplasm is available. Because Citrullus amarus is an important reservoir of resistance genes for the cultivated watermelon, C. lanatus, we screened the United States Department of Agriculture plant introduction collection of C. amarus for resistance to PLS. Accessions (n = 117) were phenotyped for their level of resistance to PLS in two separate tests. Accession means of percent leaf area affected ranged from 1.5 to 99.4%. The broad-sense heritability for the trait was 0.51. Whole-genome resequencing generated 2,126,759 single-nucleotide polymorphisms (SNPs) which were used to perform a genome-wide association study (GWAS) aimed at discovering molecular markers for resistance. Three different models-BLINK, FarmCPU, and MLM-were included in the GWAS analyses. BLINK and FarmCPU, which are multilocus models, found eight SNPs, located on chromosomes Ca01, Ca05, Ca06, Ca08, and Ca10, that were significantly associated with resistance to PLS. Two of these SNPs were found by both BLINK and FarmCPU. The MLM model did not detect any significant associations. BLINK and FarmCPU estimated an explained phenotypic variance of 43.6 and 28.5%, respectively, for SNP S6_19327000 and 25.0 and 26.0%, respectively, for SNP S1_33362258, the two most significant SNPs found. In total, 43 candidate genes with known involvement in disease resistance were discovered within the genomic intervals of seven of the eight peak SNPs. Eleven of the candidate genes that were found have been reported to be involved in resistance to P. syringae in other plant species. Two significant SNPs were within resistance genes previously documented to play important roles of plant resistance specific to P. syringae in other pathosystems. The SNPs identified in this study will be instrumental in finding causal genes involved in PLS resistance in watermelon and developing resistant germplasm through breeding.
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Affiliation(s)
- Gabriel Rennberger
- United States Department of Agriculture-Agricultural Research Service (USDA-ARS), U.S. Vegetable Laboratory, Charleston, SC 29414
| | - Sandra E Branham
- Clemson University, Department of Plant and Environmental Sciences, Coastal Research and Education Center, Charleston, SC 29414
| | - William P Wechter
- United States Department of Agriculture-Agricultural Research Service (USDA-ARS), U.S. Vegetable Laboratory, Charleston, SC 29414
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Barr ZK, Werner T, Tilsner J. Heavy Metal-Associated Isoprenylated Plant Proteins (HIPPs) at Plasmodesmata: Exploring the Link between Localization and Function. PLANTS (BASEL, SWITZERLAND) 2023; 12:3015. [PMID: 37631227 PMCID: PMC10459601 DOI: 10.3390/plants12163015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 08/09/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
Heavy metal-associated isoprenylated plant proteins (HIPPs) are a metallochaperone-like protein family comprising a combination of structural features unique to vascular plants. HIPPs possess both one or two heavy metal-binding domains and an isoprenylation site, facilitating a posttranslational protein lipid modification. Recent work has characterized individual HIPPs across numerous different species and provided evidence for varied functionalities. Interestingly, a significant number of HIPPs have been identified in proteomes of plasmodesmata (PD)-nanochannels mediating symplastic connectivity within plant tissues that play pivotal roles in intercellular communication during plant development as well as responses to biotic and abiotic stress. As characterized functions of many HIPPs are linked to stress responses, plasmodesmal HIPP proteins are potentially interesting candidate components of signaling events at or for the regulation of PD. Here, we review what is known about PD-localized HIPP proteins specifically, and how the structure and function of HIPPs more generally could link to known properties and regulation of PD.
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Affiliation(s)
- Zoe Kathleen Barr
- Biomedical Sciences Research Complex, University of St Andrews, BMS Building, North Haugh, St Andrews, Fife KY16 9ST, UK;
- Cell & Molecular Sciences, The James Hutton Institute, Dundee DD2 5DA, UK
| | - Tomáš Werner
- Department of Biology, University of Graz, Schubertstraße 51, 8010 Graz, Austria
| | - Jens Tilsner
- Biomedical Sciences Research Complex, University of St Andrews, BMS Building, North Haugh, St Andrews, Fife KY16 9ST, UK;
- Cell & Molecular Sciences, The James Hutton Institute, Dundee DD2 5DA, UK
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5
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Bibi M, Hussain A, Ali F, Ali A, Said F, Tariq K, Yun BW. In Silico Characterisation of the Aedes aegypti Gustatory Receptors. Int J Mol Sci 2023; 24:12263. [PMID: 37569638 PMCID: PMC10419030 DOI: 10.3390/ijms241512263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/20/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Aedes aegypti, also known as the dengue mosquito or the yellow fewer mosquito, is the vector of dengue, chikungunya, Zika, Mayaro and yellow fever viruses. The A. aegypti genome contains an array of gustatory receptor (GR) proteins that are related to the recognition of taste. In this study, we performed in silico molecular characterization of all 72 A. aegypti GRs reported in the latest version of A. aegypti genome AaegL5. Phylogenetic analysis classified the receptors into three major clads. Multiple GRs were found to encode multiple transcripts. Physicochemical attributes such as the aliphatic index, hydropathicity index and isoelectric point indicated that A. aegypti gustatory receptors are highly stable and are tailored to perform under a variety of cellular environments. Analysis for subcellular localization indicated that all the GRs are located either in the extracellular matrix or the plasma membrane. Results also indicated that the GRs are distributed mainly on chromosomes 2 and 3, which house 22 and 49 GRs, respectively, whereas chromosome 1 houses only one GR. NCBI-CDD analysis showed the presence of a highly conserved 7tm_7 chemosensory receptor protein superfamily that includes gustatory and odorant receptors from insect species Anopheles gambiae and Drosophila melanogaster. Further, three significantly enriched ungapped motifs in the protein sequence of all 72 A. aegypti gustatory receptors were found. High-quality 3D models for the tertiary structures were predicted with significantly higher confidence, along with ligand-binding residues. Prediction of S-nitrosylation sites indicated the presence of target cysteines in all the GRs with close proximity to the ligand-bindings sites within the 3D structure of the receptors. In addition, two highly conserved motifs inside the GR proteins were discovered that house a tyrosine (Y) and a cysteine (C) residue which may serve as targets for NO-mediated tyrosine nitration and S-nitrosylation, respectively. This study will help devise strategies for functional genomic studies of these important receptor molecules in A. aegypti and other mosquito species through in vitro and in vivo studies.
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Affiliation(s)
- Maria Bibi
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Adil Hussain
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Farman Ali
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Asad Ali
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Fazal Said
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Kaleem Tariq
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
| | - Byung-Wook Yun
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
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Yang L, Wu X, Liu S, Zhang L, Li T, Cao Y, Duan Q. Comprehensive Analysis of BrHMPs Reveals Potential Roles in Abiotic Stress Tolerance and Pollen–Stigma Interaction in Brassica rapa. Cells 2023; 12:cells12071096. [PMID: 37048168 PMCID: PMC10093364 DOI: 10.3390/cells12071096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/28/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023] Open
Abstract
Heavy metal-associated proteins (HMPs) participate in heavy metal detoxification. Although HMPs have been identified in several plants, no studies to date have identified the HMPs in Brassica rapa (B. rapa). Here, we identified 85 potential HMPs in B. rapa by bioinformatic methods. The promoters of the identified genes contain many elements associated with stress responses, including response to abscisic acid, low-temperature, and methyl jasmonate. The expression levels of BrHMP14, BrHMP16, BrHMP32, BrHMP41, and BrHMP42 were upregulated under Cu2+, Cd2+, Zn2+, and Pb2+ stresses. BrHMP06, BrHMP30, and BrHMP41 were also significantly upregulated after drought treatment. The transcripts of BrHMP06 and BrHMP11 increased mostly under cold stress. After applying salt stress, the expression of BrHMP02, BrHMP16, and BrHMP78 was induced. We observed increased BrHMP36 expression during the self-incompatibility (SI) response and decreased expression in the compatible pollination (CP) response during pollen–stigma interactions. These changes in expression suggest functions for these genes in HMPs include participating in heavy metal transport, detoxification, and response to abiotic stresses, with the potential for functions in sexual reproduction. We found potential co-functional partners of these key players by protein–protein interaction (PPI) analysis and found that some of the predicted protein partners are known to be involved in corresponding stress responses. Finally, phosphorylation investigation revealed many phosphorylation sites in BrHMPs, suggesting post-translational modification may occur during the BrHMP-mediated stress response. This comprehensive analysis provides important clues for the study of the molecular mechanisms of BrHMP genes in B. rapa, especially for abiotic stress and pollen–stigma interactions.
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Affiliation(s)
- Lin Yang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Xiaoyu Wu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Shangjia Liu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Lina Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Ting Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Yunyun Cao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Qiaohong Duan
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
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The Key Roles of ROS and RNS as a Signaling Molecule in Plant-Microbe Interactions. Antioxidants (Basel) 2023; 12:antiox12020268. [PMID: 36829828 PMCID: PMC9952064 DOI: 10.3390/antiox12020268] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/13/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023] Open
Abstract
Reactive oxygen species (ROS) and reactive nitrogen species (RNS) play a pivotal role in the dynamic cell signaling systems in plants, even under biotic and abiotic stress conditions. Over the past two decades, various studies have endorsed the notion that these molecules can act as intracellular and intercellular signaling molecules at a very low concentration to control plant growth and development, symbiotic association, and defense mechanisms in response to biotic and abiotic stress conditions. However, the upsurge of ROS and RNS under stressful conditions can lead to cell damage, retarded growth, and delayed development of plants. As signaling molecules, ROS and RNS have gained great attention from plant scientists and have been studied under different developmental stages of plants. However, the role of RNS and RNS signaling in plant-microbe interactions is still unknown. Different organelles of plant cells contain the enzymes necessary for the formation of ROS and RNS as well as their scavengers, and the spatial and temporal positions of these enzymes determine the signaling pathways. In the present review, we aimed to report the production of ROS and RNS, their role as signaling molecules during plant-microbe interactions, and the antioxidant system as a balancing system in the synthesis and elimination of these species.
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8
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Vuong UT, Iswanto ABB, Nguyen Q, Kang H, Lee J, Moon J, Kim SH. Engineering plant immune circuit: walking to the bright future with a novel toolbox. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:17-45. [PMID: 36036862 PMCID: PMC9829404 DOI: 10.1111/pbi.13916] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/20/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Plant pathogens destroy crops and cause severe yield losses, leading to an insufficient food supply to sustain the human population. Apart from relying on natural plant immune systems to combat biological agents or waiting for the appropriate evolutionary steps to occur over time, researchers are currently seeking new breakthrough methods to boost disease resistance in plants through genetic engineering. Here, we summarize the past two decades of research in disease resistance engineering against an assortment of pathogens through modifying the plant immune components (internal and external) with several biotechnological techniques. We also discuss potential strategies and provide perspectives on engineering plant immune systems for enhanced pathogen resistance and plant fitness.
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Affiliation(s)
- Uyen Thi Vuong
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Arya Bagus Boedi Iswanto
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Quang‐Minh Nguyen
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Hobin Kang
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Jihyun Lee
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Jiyun Moon
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
| | - Sang Hee Kim
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research CenterGyeongsang National UniversityJinjuRepublic of Korea
- Division of Life ScienceGyeongsang National UniversityJinjuRepublic of Korea
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9
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Zahra S, Shaheen T, Qasim M, Mahmood-Ur-Rahman, Hussain M, Zulfiqar S, Shaukat K, Mehboob-Ur-Rahman. Genome-wide survey of HMA gene family and its characterization in wheat ( Triticum aestivum). PeerJ 2023; 11:e14920. [PMID: 36890869 PMCID: PMC9987320 DOI: 10.7717/peerj.14920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/27/2023] [Indexed: 03/06/2023] Open
Abstract
Background Abiotic stresses, particularly drought and heavy metal toxicity, have presented a significant risk to long-term agricultural output around the world. Although the heavy-metal-associated domain (HMA) gene family has been widely explored in Arabidopsis and other plants, it has not been thoroughly studied in wheat (Triticum aestivum). This study was proposed to investigate the HMA gene family in wheat. Methods To analyze the phylogenetic relationships, gene structure, gene ontology, and conserved motifs, a comparative study of wheat HMA genes with the Arabidopsis genome was performed. Results A total of 27 T. aestivum proteins belonging to the HMA gene family were identified in this study, with amino acid counts ranging from 262 to 1,071. HMA proteins were found to be grouped into three subgroups in a phylogenetic tree, and closely related proteins in the tree showed the same expression patterns as motifs found in distinct subgroups. Gene structural study elucidated that intron and exon arrangement differed by family. Conclusion As a result, the current work offered important information regarding HMA family genes in the T. aestivum genome, which will be valuable in understanding their putative functions in other wheat species.
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Affiliation(s)
- Sadaf Zahra
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Tayyaba Shaheen
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Qasim
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Mahmood-Ur-Rahman
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Momina Hussain
- Department of Biotechnology, Faculty of Life Sciences, University of Okara, Okara, Pakistan
| | - Sana Zulfiqar
- Plant Genomics and Molecular Breeding Laboratory, National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Kanval Shaukat
- Department of Botany, University of Balochistan, Quetta, Pakistan
| | - Mehboob-Ur-Rahman
- Plant Genomics and Molecular Breeding Laboratory, National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
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10
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Cao HW, Zhao YN, Liu XS, Rono JK, Yang ZM. A metal chaperone OsHIPP16 detoxifies cadmium by repressing its accumulation in rice crops. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 311:120058. [PMID: 36041567 DOI: 10.1016/j.envpol.2022.120058] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/09/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) is an environmentally polluted toxic heavy metal and seriously risks food safety and human health through food chain. Mining genetic potentials of plants is a crucial step for limiting Cd accumulation in rice crops and improving environmental quality. This study characterized a novel locus in rice genome encoding a Cd-binding protein named OsHIPP16, which resides in the nucleus and near plasma membrane. OsHIPP16 was strongly induced by Cd stress. Histochemical analysis with pHIPP16::GUS reveals that OsHIPP16 is primarily expressed in root and leaf vascular tissues. Expression of OsHIPP16 in the yeast mutant strain ycf1 sensitive to Cd conferred cellular tolerance. Transgenic rice overexpressing OsHIPP16 (OE) improved rice growth with increased plant height, biomass, and chlorophyll content but with a lower degree of oxidative injury and Cd accumulation, whereas knocking out OsHIPP16 by CRISPR-Cas9 compromised the growth and physiological response. A lifelong trial with Cd-polluted soil shows that the OE plants accumulated much less Cd, particularly in brown rice where the Cd concentrations declined by 11.76-34.64%. Conversely, the knockout oshipp16 mutants had higher levels of Cd with the concentration in leaves being increased by 26.36-35.23% over the wild-type. These results suggest that adequate expression of OsHIPP16 would profoundly contribute to Cd detoxification by regulating Cd accumulation in rice, suggesting that both OE and oshipp16 mutant plants have great potentials for restricting Cd acquisition in the rice crop and phytoremediation of Cd-contaminated wetland soils.
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Affiliation(s)
- Hong Wei Cao
- Department of Biochemistry and Molecular Biology, College of Life Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ya Ning Zhao
- Department of Biochemistry and Molecular Biology, College of Life Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xue Song Liu
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Justice Kipkorir Rono
- Department of Biochemistry and Molecular Biology, College of Life Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhi Min Yang
- Department of Biochemistry and Molecular Biology, College of Life Science, Nanjing Agricultural University, Nanjing, 210095, China.
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Pande A, Mun BG, Methela NJ, Rahim W, Lee DS, Lee GM, Hong JK, Hussain A, Loake G, Yun BW. Heavy metal toxicity in plants and the potential NO-releasing novel techniques as the impending mitigation alternatives. FRONTIERS IN PLANT SCIENCE 2022; 13:1019647. [PMID: 36267943 PMCID: PMC9578046 DOI: 10.3389/fpls.2022.1019647] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 09/07/2022] [Indexed: 05/23/2023]
Abstract
Environmental pollutants like heavy metals are toxic, persistent, and bioaccumulative in nature. Contamination of agricultural fields with heavy metals not only hampers the quality and yield of crops but also poses a serious threat to human health by entering the food chain. Plants generally cope with heavy metal stress by regulating their redox machinery. In this context, nitric oxide (NO) plays a potent role in combating heavy metal toxicity in plants. Studies have shown that the exogenous application of NO donors protects plants against the deleterious effects of heavy metals by enhancing their antioxidative defense system. Most of the studies have used sodium nitroprusside (SNP) as a NO donor for combating heavy metal stress despite the associated concerns related to cyanide release. Recently, NO-releasing nanoparticles have been tested for their efficacy in a few plants and other biomedical research applications suggesting their use as an alternative to chemical NO donors with the advantage of safe, slow and prolonged release of NO. This suggests that they may also serve as potential candidates in mitigating heavy metal stress in plants. Therefore, this review presents the role of NO, the application of chemical NO donors, potential advantages of NO-releasing nanoparticles, and other NO-release strategies in biomedical research that may be useful in mitigating heavy metal stress in plants.
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Affiliation(s)
- Anjali Pande
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Bong-Gyu Mun
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Nusrat Jahan Methela
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Waqas Rahim
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Da-Sol Lee
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Geun-Mo Lee
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
| | - Jeum Kyu Hong
- Laboratory of Horticultural Crop Protection, Department of Horticultural Science, Gyeongsang National University, Jinju, South Korea
| | - Adil Hussain
- Department of Entomology, Abdul Wali Khan University, Mardan, Pakistan
| | - Gary Loake
- Institute of Molecular Plant Sciences, The University of Edinburgh, Edinburgh, United Kingdom
| | - Byung-Wook Yun
- Laboratory of Plant Molecular Pathology and Functional Genomics, Department of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National University, Daegu, South Korea
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12
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Rono JK, Sun D, Yang ZM. Metallochaperones: A critical regulator of metal homeostasis and beyond. Gene 2022; 822:146352. [PMID: 35183685 DOI: 10.1016/j.gene.2022.146352] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/03/2022] [Accepted: 02/15/2022] [Indexed: 12/11/2022]
Abstract
Metallochaperones are a class of unique protein families that was originally found to interact with cellular metal ions by metal delivery to specific target proteins such as metal enzymes. Recently, some members of metallochaperones receive much attention owning to their multi-biological functions in mediating plant growth, development and biotic or abiotic stress responses, particularly in the aspects of metal transport and accumulation in plants. For example, some non-essential toxic heavy metals (e.g. cadmium and mercury) accumulating in farmland due to the industrial and agronomic activities, are a constant threat to crop production, food safety and human health. Digging genetic resources and functional genes like metallochaperones is critical for understanding the metal detoxification in plants, and may help develop cleaner crops with minimal toxic metals in leafy vegetables and grains, or plants for metal-polluted soil phytoremediation. In this review, we highlight the current advancement of the research on functions of metallochaperones in metal accumulation, detoxification and homeostasis. We also summarize the recent progress of the research on the critical roles of the metal-binding proteins in regulating plant responses to some other biological processes including plant growth, development, pathogen stresses, and abiotic stresses such salt, drought, cold and light. Finally, an additional capacity of some members of metallochaperones involved in the resistance to the pathogen attack and possibly regulatory roles was reviewed.
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Affiliation(s)
- Justice Kipkorir Rono
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Di Sun
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhi Min Yang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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13
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Lee SU, Mun BG, Bae EK, Kim JY, Kim HH, Shahid M, Choi YI, Hussain A, Yun BW. Drought Stress-Mediated Transcriptome Profile Reveals NCED as a Key Player Modulating Drought Tolerance in Populus davidiana. FRONTIERS IN PLANT SCIENCE 2021; 12:755539. [PMID: 34777433 PMCID: PMC8581814 DOI: 10.3389/fpls.2021.755539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Populus trichocarpa has been studied as a model poplar species through biomolecular approaches and was the first tree species to be genome sequenced. In this study, we employed a high throughput RNA-sequencing (RNA-seq) mediated leaf transcriptome analysis to investigate the response of four different Populus davidiana cultivars to drought stress. Following the RNA-seq, we compared the transcriptome profiles and identified two differentially expressed genes (DEGs) with contrasting expression patterns in the drought-sensitive and tolerant groups, i.e., upregulated in the drought-tolerant P. davidiana groups but downregulated in the sensitive group. Both these genes encode a 9-cis-epoxycarotenoid dioxygenase (NCED), a key enzyme required for abscisic acid (ABA) biosynthesis. The high-performance liquid chromatography (HPLC) measurements showed a significantly higher ABA accumulation in the cultivars of the drought-tolerant group following dehydration. The Arabidopsis nced3 loss-of-function mutants showed a significantly higher sensitivity to drought stress, ~90% of these plants died after 9 days of drought stress treatment. The real-time PCR analysis of several key genes indicated a strict regulation of drought stress at the transcriptional level in the P. davidiana drought-tolerant cultivars. The transgenic P. davidiana NCED3 overexpressing (OE) plants were significantly more tolerant to drought stress as compared with the NCED knock-down RNA interference (RNAi) lines. Further, the NCED OE plants accumulated a significantly higher quantity of ABA and exhibited strict regulation of drought stress at the transcriptional level. Furthermore, we identified several key differences in the amino acid sequence, predicted structure, and co-factor/ligand binding activity of NCED3 between drought-tolerant and susceptible P. davidiana cultivars. Here, we presented the first evidence of the significant role of NCED genes in regulating ABA-dependent drought stress responses in the forest tree P. davidiana and uncovered the molecular basis of NCED3 evolution associated with increased drought tolerance.
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Affiliation(s)
- Sang-Uk Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Bong-Gyu Mun
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Eun-Kyung Bae
- Forest Microbiology Division, National Institute of Forest Science, Suwon-si, South Korea
| | - Jae-Young Kim
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Hyun-Ho Kim
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Muhammad Shahid
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
- Agriculture Research Institute, Mingora, Swat, Pakistan
| | - Young-Im Choi
- Forest Biotechnology Division, National Institute of Forest Science, Suwon-si, South Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Byung-Wook Yun
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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14
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Wang Q, Lu X, Chen X, Zhao L, Han M, Wang S, Zhang Y, Fan Y, Ye W. Genome-wide identification and function analysis of HMAD gene family in cotton (Gossypium spp.). BMC PLANT BIOLOGY 2021; 21:386. [PMID: 34416873 PMCID: PMC8377987 DOI: 10.1186/s12870-021-03170-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND The abiotic stress such as soil salinization and heavy metal toxicity has posed a major threat to sustainable crop production worldwide. Previous studies revealed that halophytes were supposed to tolerate other stress including heavy metal toxicity. Though HMAD (heavy-metal-associated domain) was reported to play various important functions in Arabidopsis, little is known in Gossypium. RESULTS A total of 169 G. hirsutum genes were identified belonging to the HMAD gene family with the number of amino acids ranged from 56 to 1011. Additionally, 84, 76 and 159 HMAD genes were identified in each G. arboreum, G. raimondii and G. barbadense, respectively. The phylogenetic tree analysis showed that the HMAD gene family were divided into five classes, and 87 orthologs of HMAD genes were identified in four Gossypium species, such as genes Gh_D08G1950 and Gh_A08G2387 of G. hirsutum are orthologs of the Gorai.004G210800.1 and Cotton_A_25987 gene in G. raimondii and G. arboreum, respectively. In addition, 15 genes were lost during evolution. Furthermore, conserved sequence analysis found the conserved catalytic center containing an anion binding (CXXC) box. The HMAD gene family showed a differential expression levels among different tissues and developmental stages in G. hirsutum with the different cis-elements for abiotic stress. CONCLUSIONS Current study provided important information about HMAD family genes under salt-stress in Gossypium genome, which would be useful to understand its putative functions in different species of cotton.
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Affiliation(s)
- Qinqin Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Xuke Lu
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Xiugui Chen
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Lanjie Zhao
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Mingge Han
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Shuai Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Yuexin Zhang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Yapeng Fan
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Wuwei Ye
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
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15
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Prakash V, Singh VP, Tripathi DK, Sharma S, Corpas FJ. Nitric oxide (NO) and salicylic acid (SA): A framework for their relationship in plant development under abiotic stress. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23 Suppl 1:39-49. [PMID: 33590621 DOI: 10.1111/plb.13246] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/03/2021] [Indexed: 05/28/2023]
Abstract
The free radical nitric oxide (NO) and the phenolic phytohormone salicylic acid (SA) are signal molecules which exert key functions at biochemical and physiological levels. Abiotic stresses, especially in early plant development, impose the biggest threats to agricultural systems and crop yield. These stresses impair plant growth and subsequently cause a reduction in root development, affecting nutrient uptake and crop productivity. The molecules NO and SA have been identified as robust tools for efficiently mitigating the negative effects of abiotic stress in plants. SA is engaged in an array of tasks under adverse environmental situations. The function of NO depends on its cellular concentration; at a low level, it acts as a signal molecule, while at a high level, it triggers nitro-oxidative stress. The crosstalk between NO and SA involving different signalling molecules and regulatory factors modulate plant function during stressful situations. Crosstalk between these two signalling molecules induces plant tolerance to abiotic stress and needs further investigation. This review aims to highlight signalling aspects of NO and SA in higher plants and critically discusses the roles of these two molecules in alleviating abiotic stress.
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Affiliation(s)
- V Prakash
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India
| | - V P Singh
- Department of Botany, C.M.P. Degree College, A Constitute PG College of University of Allahabad, Prayagraj, India
| | - D K Tripathi
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Noida, India
| | - S Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, India
| | - F J Corpas
- Department of Biochemistry, Cell and Molecular Biology, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
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16
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Rolly NK, Imran QM, Shahid M, Imran M, Khan M, Lee SU, Hussain A, Lee IJ, Yun BW. Drought-induced AtbZIP62 transcription factor regulates drought stress response in Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 156:384-395. [PMID: 33007532 DOI: 10.1016/j.plaphy.2020.09.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
We investigated the role of AtbZIP62, an uncharacterized Arabidopsis bZIP TF, in oxidative, nitro-oxidative and drought stress conditions using reverse genetics approach. We further monitored the expression of AtPYD1 gene (orthologous to rice OsDHODH1 involved in the pyrimidine biosynthesis) in atbzip62 knock-out (KO) plants in order to investigate the transcriptional interplay of AtbZIP62 and AtPYD1. The atbzip62 KO plants showed significant increase in shoot length under oxidative stress, while no significant difference was recorded for root length compared to WT. However, under nitro-oxidative stress conditions, atbzip62 showed differential response to both NO-donors. Further characterization of AtbZIP62 under drought conditions showed that both atbzip62 and atpyd1-2 showed a sensitive phenotype to drought stress, and could not recover after re-watering. Transcript accumulation of AtbZIP62 and AtPYD1 showed that both were highly up-regulated by drought stress in wild type (WT) plants. Interestingly, AtPYD1 transcriptional level significantly decreased in atbzip62 exposed to drought stress. However, AtbZIP62 expression was highly induced in atpyd1-2 under the same conditions. Both AtbZIP62 and AtPYD1 were up-regulated in atnced3 and atcat2 while showing a contrasting expression pattern in atgsnor1-3. The recorded increase in CAT, POD, and PPO-like activities, the accumulation of chlorophylls and total carotenoids, and the enhanced proline and malondialdehyde levels would explain the sensitivity level of atbzip62 towards drought stress. All results collectively suggest that AtbZIP62 could be involved in AtPYD1 transcriptional regulation while modulating cellular redox state and photosynthetic processes. In addition, AtbZIP62 is suggested to positively regulate drought stress response in Arabidopsis.
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Affiliation(s)
- Nkulu Kabange Rolly
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea; National Laboratory of Seed Testing, National Seed Service, SENASEM, Ministry of Agriculture, Kinshasa, Democratic Republic of the Congo.
| | - Qari Muhammad Imran
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Muhammad Shahid
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Muhammad Imran
- Laboratory of Crop Physiology, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Murtaza Khan
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Sang-Uk Lee
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University, Mardan, 23200, KP, Pakistan.
| | - In-Jung Lee
- Laboratory of Crop Physiology, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
| | - Byung-Wook Yun
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
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17
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He G, Qin L, Tian W, Meng L, He T, Zhao D. Heavy Metal Transporters-Associated Proteins in S. tuberosum: Genome-Wide Identification, Comprehensive Gene Feature, Evolution and Expression Analysis. Genes (Basel) 2020; 11:genes11111269. [PMID: 33126505 PMCID: PMC7694169 DOI: 10.3390/genes11111269] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/20/2020] [Accepted: 10/25/2020] [Indexed: 02/07/2023] Open
Abstract
Plants have evolved a number of defense and adaptation responses to protect themselves against challenging environmental stresses. Genes containing a heavy metal associated (HMA) domain are required for the spatiotemporal transportation of metal ions that bind with various enzymes and co-factors within the cell. To uncover the underlying mechanisms mediated by StHMA genes, we identified 36 gene members in the StHMA family and divided them into six subfamilies by phylogenetic analysis. The StHMAs had high collinearity and were segmentally duplicated. Structurally, most StHMAs had one HMA domain, StHIPPc and StRNA1 subfamilies had two, and 13 StHMAs may be genetically variable. The StHMA gene structures and motifs varied considerably among the various classifications, this suggests the StHMA family is diverse in genetic functions. The promoter analysis showed that the StHMAs had six main cis-acting elements with abiotic stress. An expression pattern analysis revealed that the StHMAs were expressed tissue specifically, and a variety of abiotic stresses may induce the expression of StHMA family genes. The HMA transporter family may be regulated and expressed by a series of complex signal networks under abiotic stress. The results of this study may help to establish a theoretical foundation for further research investigating the functions of HMA genes in Solanum tuberosum to elucidate their regulatory role in the mechanism governing the response of plants to abiotic stress.
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Affiliation(s)
- Guandi He
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China; (G.H.); (L.Q.)
| | - Lijun Qin
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China; (G.H.); (L.Q.)
| | - Weijun Tian
- Agricultural College, Guizhou University, Guiyang 550025, China; (W.T.); (L.M.)
| | - Lulu Meng
- Agricultural College, Guizhou University, Guiyang 550025, China; (W.T.); (L.M.)
| | - Tengbing He
- Agricultural College, Guizhou University, Guiyang 550025, China; (W.T.); (L.M.)
- Institute of New Rural Development of Guizhou University, Guiyang 550025, China
- Correspondence: (T.H.); (D.Z.)
| | - Degang Zhao
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China; (G.H.); (L.Q.)
- Guizhou Academy of Agricultural Science, Guiyang 550025, China
- Correspondence: (T.H.); (D.Z.)
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18
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Li G, Li Q, Wang L, Zhang D. Cadmium tolerance and detoxification in Myriophyllum aquaticum: physiological responses, chemical forms, and subcellular distribution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:37733-37744. [PMID: 32607997 DOI: 10.1007/s11356-020-09872-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Submerged macrophytes have been found to be promising in removing cadmium (Cd) from aquatic ecosystems; however, the mechanism of Cd detoxification in these plants is still poorly understood. In the present study, Cd chemical forms and subcellular distributing behaviors in Myriophyllum aquaticum and the physiological mechanism underlying M. aquaticum in response to Cd stress were explored. During the study, M. aquaticum was grown in a hydroponic system and was treated under different concentrations of Cd (0, 0.01, 0.05, 0.25, and 1.25 mg/L) for 14 days. The differential centrifugation suggested that most Cd was split in the soluble fraction (57.40-66.25%) and bound to the cell wall (24.92-38.57%). Furthermore, Cd in M. aquaticum was primarily present in NaCl-extractable Cd (51.76-91.15% in leaves and 58.71-84.76% in stems), followed by acetic acid-extractable Cd (5.17-22.42% in leaves and 9.54-16.56% in stems) and HCl-extractable Cd (0.80-12.23% in leaves and 3.56-18.87% in stems). The malondialdehyde (MDA) and hydrogen peroxide (H2O2) concentrations in M. aquaticum were noticeably increased under each Cd concentration. The activities of catalase (CAT), guaiacol peroxidase (POD), and superoxide dismutase (SOD) in leaves were initially increased under relatively low concentrations of Cd but were decreased further with the increasing concentrations of Cd. The ascorbate (AsA), glutathione (GSH), and nitric oxide (NO) concentrations in stems increased with increasing Cd concentrations. Taken together, our results indicate that M. aquaticum can be used successfully for phytoremediation of Cd-contaminated water, and the detoxification mechanisms in M. aquaticum include enzymatic and non-enzymatic antioxidants, subcellular partitioning, and the formation of different chemical forms of Cd.
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Affiliation(s)
- Guoxin Li
- College of Environmental Sciences and Engineering, Xiamen University of Technology, Xiamen, China.
| | - Qingsong Li
- College of Environmental Sciences and Engineering, Xiamen University of Technology, Xiamen, China
| | - Lei Wang
- College of Environmental Sciences and Engineering, Xiamen University of Technology, Xiamen, China
| | - Dandan Zhang
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
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19
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Nabi RBS, Tayade R, Imran QM, Hussain A, Shahid M, Yun BW. Functional Insight of Nitric-Oxide Induced DUF Genes in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2020; 11:1041. [PMID: 32765550 PMCID: PMC7378322 DOI: 10.3389/fpls.2020.01041] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 06/24/2020] [Indexed: 05/30/2023]
Abstract
Advances in next-generation sequencing technologies facilitate the study of plant molecular functions in detail and with precision. Plant genome and proteome databases are continually being updated with large transcriptomic or genomic datasets. With the ever-increasing amount of sequencing data, several thousands of genes or proteins in public databases remain uncharacterized, and their domain functions are largely unknown. Such proteins contain domains of unknown function (DUF). In the present study, we identified 231 upregulated and 206 downregulated DUF genes from the available RNA-Seq-based transcriptome profiling datasets of Arabidopsis leaves exposed to a nitric oxide donor, S-nitroso-L-cysteine (CysNO). In addition, we performed extensive in silico and biological experiments to determine the potential functions of AtDUF569 and to elucidate its role in plant growth, development, and defense. We validated the expression pattern of the most upregulated and the most downregulated DUF genes from the transcriptomic data. In addition, a loss-of AtDUF569 function mutant was evaluated for growth, development, and defense against biotic and abiotic stresses. According to the results of the study, AtDUF569 negatively regulates biotic stress responses and differentially regulates plant growth under nitro-oxidative stress conditions.
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Affiliation(s)
- Rizwana Begum Syed Nabi
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang, South Korea
| | - Rupesh Tayade
- Laboratory of Plant Breeding, School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Qari Muhammad Imran
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University, Mardan, Pakistan
| | - Muhammad Shahid
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Byung-Wook Yun
- Laboratory of Plant Functional Genomics, School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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20
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Khan M, Imran QM, Shahid M, Mun BG, Lee SU, Khan MA, Hussain A, Lee IJ, Yun BW. Nitric oxide- induced AtAO3 differentially regulates plant defense and drought tolerance in Arabidopsis thaliana. BMC PLANT BIOLOGY 2019; 19:602. [PMID: 31888479 PMCID: PMC6937950 DOI: 10.1186/s12870-019-2210-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 12/18/2019] [Indexed: 05/29/2023]
Abstract
BACKGROUND Exposure of plants to different environmental insults instigates significant changes in the cellular redox tone driven in part by promoting the production of reactive nitrogen species. The key player, nitric oxide (NO) is a small gaseous diatomic molecule, well-known for its signaling role during stress. In this study, we focused on abscisic acid (ABA) metabolism-related genes that showed differential expression in response to the NO donor S-nitroso-L-cysteine (CySNO) by conducting RNA-seq-based transcriptomic analysis. RESULTS CySNO-induced ABA-related genes were identified and further characterized. Gene ontology terms for biological processes showed most of the genes were associated with protein phosphorylation. Promoter analysis suggested that several cis-regulatory elements were activated under biotic and/or abiotic stress conditions. The ABA biosynthetic gene AtAO3 was selected for validation using functional genomics. The loss of function mutant atao3 was found to differentially regulate oxidative and nitrosative stress. Further investigations for determining the role of AtAO3 in plant defense suggested a negative regulation of plant basal defense and R-gene-mediated resistance. The atao3 plants showed resistance to virulent Pseudomonas syringae pv. tomato strain DC3000 (Pst DC3000) with gradual increase in PR1 gene expression. Similarly, atao3 plants showed increased hypersensitive response (HR) when challenged with Pst DC3000 (avrB). The atgsnor1-3 and atsid2 mutants showed a susceptible phenotype with reduced PR1 transcript accumulation. Drought tolerance assay indicated that atao3 and atnced3 ABA-deficient mutants showed early wilting, followed by plant death. The study of stomatal structure showed that atao3 and atnced3 were unable to close stomata even at 7 days after drought stress. Further, they showed reduced ABA content and increased electrolyte leakage than the wild-type (WT) plants. The quantitative polymerase chain reaction analysis suggested that ABA biosynthesis genes were down-regulated, whereas expression of most of the drought-related genes were up-regulated in atao3 than in WT. CONCLUSIONS AtAO3 negatively regulates pathogen-induced salicylic acid pathway, although it is required for drought tolerance, despite the fact that ABA production is not totally dependent on AtAO3, and that drought-related genes like DREB2 and ABI2 show response to drought irrespective of ABA content.
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Affiliation(s)
| | | | | | - Bong-Gyu Mun
- Laboratory of Plant Functional Genomics Department of Plant Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Sang-Uk Lee
- Laboratory of Plant Functional Genomics Department of Plant Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Muhammad Aaqil Khan
- Laboratory of Plant Physiology, Department of Plant Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University, KPK, Mardan, Pakistan
| | - In-Jung Lee
- Laboratory of Plant Physiology, Department of Plant Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Byung-Wook Yun
- Laboratory of Plant Functional Genomics Department of Plant Biosciences, Kyungpook National University, Daegu, Republic of Korea
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21
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Khan MA, Khan AL, Imran QM, Asaf S, Lee SU, Yun BW, Hamayun M, Kim TH, Lee IJ. Exogenous application of nitric oxide donors regulates short-term flooding stress in soybean. PeerJ 2019; 7:e7741. [PMID: 31608169 PMCID: PMC6788439 DOI: 10.7717/peerj.7741] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 08/25/2019] [Indexed: 12/20/2022] Open
Abstract
Short-term water submergence to soybean (Glycine max L.) create hypoxic conditions hindering plant growth and productivity. Nitric oxide (NO) is considered a stress-signalling and stress-evading molecule, however, little is known about its role during flooding stress. We elucidated the role of sodium nitroprusside (SNP) and S-nitroso L-cysteine (CySNO) as NO donor in modulation of flooding stress-related bio-chemicals and genetic determinants of associated nitrosative stress to Daewon and Pungsannamul soybean cultivars after 3 h and 6 h of flooding stress. The results showed that exogenous SNP and CysNO induced glutathione activity and reduced the resulting superoxide anion contents during short-term flooding in Pungsannamul soybean. The exo- SNP and CysNO triggered the endogenous S-nitrosothiols, and resulted in elevated abscisic acid (ABA) contents in both soybean cultivars overtime. To know the role of ABA and NO related genes in short-term flooding stress, the mRNA expression of S-nitrosoglutathione reductase (GSNOR1), NO overproducer1 (NOX1) and nitrate reductase (NR), Timing of CAB expression1 (TOC1), and ABA-receptor (ABAR) were assessed. The transcripts accumulation of GSNOR1, NOX1, and NR being responsible for NO homeostasis, were significantly high in response to early or later phases of flooding stress. ABAR and TOC1 showed a decrease in transcript accumulation in both soybean plants treated with exogenous SNP and CySNO. The exo- SNP and CySNO could impinge a variety of biochemical and transcriptional programs that can mitigate the negative effects of short-term flooding stress in soybean.
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Affiliation(s)
- Muhammad Aaqil Khan
- School of Applied Biosciences, Kyungpook National University, Degue, South Korea
| | - Abdul Latif Khan
- Natural and Medical Sciences Research Center University of Nizwa, Nizwa, Oman
| | - Qari Muhammad Imran
- School of Applied Biosciences, Kyungpook National University, Degue, South Korea
| | - Sajjad Asaf
- Natural and Medical Sciences Research Center University of Nizwa, Nizwa, Oman
| | - Sang-Uk Lee
- School of Applied Biosciences, Kyungpook National University, Degue, South Korea
| | - Byung-Wook Yun
- School of Applied Biosciences, Kyungpook National University, Degue, South Korea
| | - Muhammad Hamayun
- Department of Botany, Abdul Wali Khan University, Mardan, Pakistan
| | - Tae-Han Kim
- School of Agricultural Civil & Bio-industrial Machinery Engineering, Kyungpook National University, Daegu, South Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Degue, South Korea
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Bot P, Mun BG, Imran QM, Hussain A, Lee SU, Loake G, Yun BW. Differential expression of AtWAKL10 in response to nitric oxide suggests a putative role in biotic and abiotic stress responses. PeerJ 2019; 7:e7383. [PMID: 31440429 PMCID: PMC6699482 DOI: 10.7717/peerj.7383] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/30/2019] [Indexed: 12/13/2022] Open
Abstract
Plant defense against pathogens and abiotic stresses is regulated differentially by communicating signal transduction pathways in which nitric oxide (NO) plays a key role. Here, we show the biological role of Arabidopsis thaliana wall-associated kinase (AtWAK) Like10 (AtWAKL10) that exhibits greater than a 100-fold change in transcript accumulation in response to the NO donor S-nitroso-L-cysteine (CysNO), identified from high throughput RNA-seq based transcriptome analysis. Loss of AtWAKL10 function showed a similar phenotype to wild type (WT) with, however, less branching. The growth of atwakl10 on media supplemented with oxidative or nitrosative stress resulted in differential results with improved growth following treatment with CysNO but reduced growth in response to S-nitrosoglutatione (GSNO) and methyl-viologen. Further, atwakl10 plants exhibited increased susceptibility to virulent Pseudomonas syringae pv tomato (Pst) DC3000 with a significant increase in pathogen growth and decrease in PR1 transcript accumulation compared to WT overtime. Similar results were found in response to Pst DC3000 avrB, resulting in increased cell death as shown by increased electrolyte leakage in atwakl10. Furthermore, atwakl10 also showed increased reactive oxygen species accumulation following Pst DC3000 avrB inoculation. Promoter analysis of AtWAKL10 showed transcription factor (TF) binding sites for biotic and abiotic stress-related TFs. Further investigation into the role of AtWAKL10 in abiotic stresses showed that following two weeks water-withholding drought condition most of the atwakl10 plants got wilted; however, the majority (60%) of these plants recovered following re-watering. In contrast, in response to salinity stress, atwakl10 showed reduced germination under 150 mM salt stress compared to WT, suggesting that NO-induced AtWAKL10 differentially regulates different abiotic stresses. Taken together, this study further elucidates the importance of NO-induced changes in gene expression and their role in plant biotic and abiotic stress tolerance.
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Affiliation(s)
- Phearom Bot
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Bong-Gyu Mun
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Qari Muhammad Imran
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Sang-Uk Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Gary Loake
- Institute of Molecular Plant Sciences, University of Edinburgh, Edinburgh, UK
| | - Byung-Wook Yun
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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Comprehensive Analyses of Nitric Oxide-Induced Plant Stem Cell-Related Genes in Arabidopsis thaliana. Genes (Basel) 2019; 10:genes10030190. [PMID: 30813477 PMCID: PMC6471024 DOI: 10.3390/genes10030190] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/18/2019] [Accepted: 02/18/2019] [Indexed: 11/17/2022] Open
Abstract
Plant stem cells are pluripotent cells that have diverse applications in regenerative biology and medicine. However, their roles in plant growth and disease resistance are often overlooked. Using high-throughput RNA-seq data, we identified approximately 20 stem cell-related differentially expressed genes (DEGs) that were responsive to the nitric oxide (NO) donor S-nitrosocysteine (CySNO) after six hours of infiltration. Among these DEGs, the highest number of positive correlations (R ≥ 0.8) was observed for CLAVATA3/EMBRYO SURROUNDING REGION-RELATED (CLE) 12. Gene ontology (GO) terms for molecular function showed DEGs associated with signal transduction and receptor activity. A promoter study of these DEGs showed the presence of cis-acting elements that are involved in growth as well as the regulation of abiotic and biotic stress. Phylogenetic analysis of the Arabidopsis stem cell-related genes and their common orthologs in rice, soybean, poplar, and tomato suggested that most soybean stem cell-related genes were grouped with the Arabidopsis CLE type of stem cell genes, while the rice stem cell-related genes were grouped with the Arabidopsis receptor-like proteins. The functional genomic-based characterization of the role of stem cell DEGs showed that under control conditions, the clv1 mutant showed a similar phenotype to that of the wild-type (WT) plants; however, under CySNO-mediated nitrosative stress, clv1 showed increased shoot and root length compared to WT. Furthermore, the inoculation of clv1 with virulent Pst DC3000 showed a resistant phenotype with fewer pathogens growing at early time points. The qRT-PCR validation and correlation with the RNA-seq data showed a Pearson correlation coefficient of >0.8, indicating the significantly high reliability of the RNA-seq analysis.
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Comprehensive Analyses of Nitric Oxide-Induced Plant Stem Cell-Related Genes in Arabidopsis thaliana. Genes (Basel) 2019. [DOI: 10.3390/genes10020173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Plant stem cells are pluripotent cells that have diverse applications in regenerative biology and medicine. However, their roles in plant growth and disease resistance are often overlooked. Using high-throughput RNA-seq data, we identified approximately 20 stem cell-related differentially expressed genes (DEGs) that were responsive to the nitric oxide (NO) donor S-nitrosocysteine (CySNO) after six hours of infiltration. Among these DEGs, the highest number of positive correlations (R ≥ 0.8) was observed for CLAVATA3/EMBRYO SURROUNDING REGION-RELATED (CLE) 12. Gene ontology (GO) terms for molecular function showed DEGs associated with signal transduction and receptor activity. A promoter study of these DEGs showed the presence of cis-acting elements that are involved in growth as well as the regulation of abiotic and biotic stress. Phylogenetic analysis of the Arabidopsis stem cell-related genes and their common orthologs in rice, soybean, poplar, and tomato suggested that most soybean stem cell-related genes were grouped with the Arabidopsis CLE type of stem cell genes, while the rice stem cell-related genes were grouped with the Arabidopsis receptor-like proteins. The functional genomic-based characterization of the role of stem cell DEGs showed that under control conditions, the clv1 mutant showed a similar phenotype to that of the wild-type (WT) plants; however, under CySNO-mediated nitrosative stress, clv1 showed increased shoot and root length compared to WT. Furthermore, the inoculation of clv1 with virulent Pst DC3000 showed a resistant phenotype with fewer pathogens growing at early time points. The qRT-PCR validation and correlation with the RNA-seq data showed a Pearson correlation coefficient of >0.8, indicating the significantly high reliability of the RNA-seq analysis.
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Dharmaraj K, Cui W, Rikkerink EHA, Templeton MD. Construction of a kiwifruit yeast two-hybrid cDNA library to identify host targets of the Pseudomonas syringae pv. actinidiae effector AvrPto5. BMC Res Notes 2019; 12:63. [PMID: 30691538 PMCID: PMC6350409 DOI: 10.1186/s13104-019-4102-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/19/2019] [Indexed: 11/10/2022] Open
Abstract
Objective Bacterial canker is a destructive disease of kiwifruit caused by the Gram-negative bacterium Pseudomonas syringae pv. actinidiae (Psa). To understand the disease-causing mechanism of Psa, a kiwifruit yeast two-hybrid cDNA library was constructed to identify putative host targets of the Psa Type Three Secreted Effector AvrPto5. Results In this study, we used the Mate & Plate™ yeast two-hybrid library method for constructing a kiwifruit cDNA library from messenger RNA of young leaves. The constructed library consisted of 2.15 × 106 independent clones with an average insert size of 1.52 kb. The screening of the kiwifruit yeast two-hybrid cDNA library with Psa AvrPto5 revealed the interaction of a V-type proton ATPase subunit-H, a proline rich-protein and heavy metal-associated isoprenylated plant protein 26. Among these, heavy metal-associated isoprenylated plant protein 26 showed a positive interaction with Psa AvrPto5 as both prey and bait. Electronic supplementary material The online version of this article (10.1186/s13104-019-4102-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Karthikeyan Dharmaraj
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand.,The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand.,Plant Health and Environment Laboratory, Ministry for Primary Industries, 231 Morrin Road, Auckland, 1072, New Zealand
| | - Wei Cui
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand
| | - Erik H A Rikkerink
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand
| | - Matthew D Templeton
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand. .,The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand.
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26
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WRKYs, the Jack-of-various-Trades, Modulate Dehydration Stress in Populus davidiana-A Transcriptomic Approach. Int J Mol Sci 2019; 20:ijms20020414. [PMID: 30669402 PMCID: PMC6358917 DOI: 10.3390/ijms20020414] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 11/17/2022] Open
Abstract
Populus davidiana, native to Korea and central Asian countries, is a major contributor to the Korean forest cover. In the current study, using high-throughput RNA-seq mediated transcriptome analysis, we identified about 87 P. davidiana WRKY transcription factors (PopdaWRKY TFs) that showed differential expression to dehydration stress in both sensitive and tolerant cultivars. Our results suggested that, on average, most of the WRKY genes were upregulated in tolerant cultivars but downregulated in sensitive cultivars. Based on protein sequence alignment, P. davidiana WRKYs were classified into three major groups, I, II, III, and further subgroups. Phylogenetic analysis showed that WRKY TFs and their orthologs in Arabidopsis and rice were clustered together in the same subgroups, suggesting similar functions across species. Significant correlation was found among qRT-PCR and RNA-seq analysis. In vivo analysis using model plant Arabidopsis showed that atwrky62 (orthologous to Potri.016G137900) knockout mutants were significantly sensitive to dehydration possibly due to an inability to close their stomata under dehydration conditions. In addition, a concomitant decrease in expression of ABA biosynthetic genes was observed. The AtHK1 that regulates stomatal movement was also downregulated in atwrky62 compared to the wild type. Taken together, our findings suggest a regulatory role of PopdaWRKYs under dehydration stress.
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27
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Exogenously Applied Nitric Oxide Enhances Salt Tolerance in Rice (Oryza sativa L.) at Seedling Stage. AGRONOMY-BASEL 2018. [DOI: 10.3390/agronomy8120276] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Salinity is one of the major abiotic factors that limit rice production worldwide. Previous trends show that salt concentration in rivers is increasing consistently, posing potentially adverse threats in the near future. Thus, crops currently being cultivated, particularly in small-scale farming systems, are under high threat from salinity. In this study, we investigated the mitigating effect of nitric oxide (NO) on salt stress in rice based on the assessment of changes in the transcript levels of different genes and the phenotypic response of rice genotypes. We observed that exogenously applied NO increased the expression levels of OsHIPP38, OsGR1, and OsP5CS2 in the susceptible genotype of rice, whereas in the tolerant genotype, the effect of NO was mainly in counteracting the salt-induced gene expression that diverts cellular energy for defense. Moreover, seedlings that were pretreated with NO showed high biomass production under salt stress conditions, indicating the positive role of NO against salt-induced leaf chlorosis and early senescence. The effect of NO-mediated enhancement was more pronounced in the salt tolerant genotype. Therefore, the use of NO with the integration of tolerant genes or genotypes will enhance salt tolerance levels in rice.
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Cheng D, Tan M, Yu H, Li L, Zhu D, Chen Y, Jiang M. Comparative analysis of Cd-responsive maize and rice transcriptomes highlights Cd co-modulated orthologs. BMC Genomics 2018; 19:709. [PMID: 30257650 PMCID: PMC6158873 DOI: 10.1186/s12864-018-5109-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Accepted: 09/21/2018] [Indexed: 11/29/2022] Open
Abstract
Background Metal tolerance is often an integrative result of metal uptake and distribution, which are fine-tuned by a network of signaling cascades and metal transporters. Thus, with the goal of advancing the molecular understanding of such metal homeostatic mechanisms, comparative RNAseq-based transcriptome analysis was conducted to dissect differentially expressed genes (DEGs) in maize roots exposed to cadmium (Cd) stress. Results To unveil conserved Cd-responsive genes in cereal plants, the obtained 5166 maize DEGs were compared with 2567 Cd-regulated orthologs in rice roots, and this comparison generated 880 universal Cd-responsive orthologs groups composed of 1074 maize DEGs and 981 rice counterparts. More importantly, most of the orthologous DEGs showed coordinated expression pattern between Cd-treated maize and rice, and these include one large orthologs group of pleiotropic drug resistance (PDR)-type ABC transporters, two clusters of amino acid transporters, and 3 blocks of multidrug and toxic compound extrusion (MATE) efflux family transporters, and 3 clusters of heavy metal-associated domain (HMAD) isoprenylated plant proteins (HIPPs), as well as all 4 groups of zinc/iron regulated transporter protein (ZIPs). Additionally, several blocks of tandem maize paralogs, such as germin-like proteins (GLPs), phenylalanine ammonia-lyases (PALs) and several enzymes involved in JA biosynthesis, displayed consistent co-expression pattern under Cd stress. Out of the 1074 maize DEGs, approximately 30 maize Cd-responsive genes such as ZmHIPP27, stress-responsive NAC transcription factor (ZmSNAC1) and 9-cis-epoxycarotenoid dioxygenase (NCED, vp14) were also common stress-responsive genes reported to be uniformly regulated by multiple abiotic stresses. Moreover, the aforementioned three promising Cd-upregulated genes with rice counterparts were identified to be novel Cd-responsive genes in maize. Meanwhile, one maize glutamate decarboxylase (ZmGAD1) with Cd co-modulated rice ortholog was selected for further analysis of Cd tolerance via heterologous expression, and the results suggest that ZmGAD1 can confer Cd tolerance in yeast and tobacco leaves. Conclusions These novel findings revealed the conserved function of Cd-responsive orthologs and paralogs, which would be valuable for elucidating the genetic basis of the plant response to Cd stress and unraveling Cd tolerance genes. Electronic supplementary material The online version of this article (10.1186/s12864-018-5109-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dan Cheng
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingpu Tan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China.
| | - Haijuan Yu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Liang Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Dandan Zhu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yahua Chen
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingyi Jiang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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Khan MA, Hamayun M, Iqbal A, Khan SA, Hussain A, Asaf S, Khan AL, Yun BW, Lee IJ. Gibberellin application ameliorates the adverse impact of short-term flooding on Glycine max L. Biochem J 2018; 475:2893-2905. [PMID: 30127090 DOI: 10.1042/bcj20180534] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/14/2018] [Accepted: 08/20/2018] [Indexed: 11/17/2022]
Abstract
Flooding is an abiotic stress that creates hypoxic conditions triggered by redox potential leading to restricted growth and grain yield in plants. In the current study, we have investigated the effect of exogenous gibberellins (GA4+7) on soybean under flooding stress. A regulatory role of GAs on biochemical changes in soybean plants [including chlorophyll contents, endogenous bioactive GA1 and GA4, endogenous jasmonic acid (JA) and abscisic acid (ABA)] has been elucidated after 3 and 6 h of flooding stress. The modulation of stress-related bio-chemicals and their genetic determinants [for instance, ABA (Timing of CAB expression1-TOC1, ABA-receptor-ABAR) and NO (S-nitrosoglutathione reductase-GSNOR1, NO overproducer1-NOX, and nitrite reductase-NR)] in response to short-term flooding stress were also explored. The current study showed that exogenous GAs rescued chlorophyll contents, enhanced endogenous bioactive GA1 and GA4 levels, endogenous jasmonic acid (JA) and checked the rate of ABA biosynthesis under short-term flooding. The exo-GAs induced the glutathione activity and reduced the resulting superoxide anion contents during short-term flooding in Pungsannamul soybean. Exo-GAs also triggered the endogenous S-nitrosothiols (precursor for increased NO production) that have been decreased over the time. Moreover, the exo-GAs could impinge a variety of biochemical and transcriptional programs that are ameliorative to plant growth during short-term flooding stress. The presence of GA1 and GA4 also confirms the presence of both C13-hydroxylation pathway and non-C13-hydroxylation pathway in soybean, respectively.
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Affiliation(s)
- Muhammad Aaqil Khan
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Muhammad Hamayun
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Amjad Iqbal
- Department of Agriculture, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Sumera Afzal Khan
- Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar, Pakistan
| | - Anwar Hussain
- Department of Botany, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Sajjad Asaf
- Natural and Medical Science Research Center, University of Nizwa, Nizwa 616, Oman, Nizwa, Oman
| | - Abdul Latif Khan
- Natural and Medical Science Research Center, University of Nizwa, Nizwa 616, Oman, Nizwa, Oman
| | - Byung-Wook Yun
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
- Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, Daegu, Republic of Korea
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Imran QM, Hussain A, Lee SU, Mun BG, Falak N, Loake GJ, Yun BW. Transcriptome profile of NO-induced Arabidopsis transcription factor genes suggests their putative regulatory role in multiple biological processes. Sci Rep 2018; 8:771. [PMID: 29335449 PMCID: PMC5768701 DOI: 10.1038/s41598-017-18850-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 12/19/2017] [Indexed: 11/08/2022] Open
Abstract
TFs are important proteins regulating plant responses during environmental stresses. These insults typically induce changes in cellular redox tone driven in part by promoting the production of reactive nitrogen species (RNS). The main source of these RNS is nitric oxide (NO), which serves as a signalling molecule, eliciting defence and resistance responses. To understand how these signalling molecules regulate key biological processes, we performed a large scale S-nitrosocysteine (CySNO)-mediated RNA-seq analysis. The DEGs were analysed to identify potential regulatory TFs. We found a total of 673 (up- and down-regulated) TFs representing a broad range of TF families. GO-enrichment and MapMan analysis suggests that more than 98% of TFs were mapped to the Arabidopsis thaliana genome and classified into pathways like hormone signalling, protein degradation, development, biotic and abiotic stress, etc. A functional analysis of three randomly selected TFs, DDF1, RAP2.6, and AtMYB48 identified a regulatory role in plant growth and immunity. Loss-of-function mutations within DDF1 and RAP2.6 showed compromised basal defence and effector triggered immunity, suggesting their positive role in two major plant defence systems. Together, these results imply an important data representing NO-responsive TFs that will help in exploring the core mechanisms involved in biological processes in plants.
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Affiliation(s)
- Qari Muhammad Imran
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University, Mardan, Pakistan
| | - Sang-Uk Lee
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Bong-Gyu Mun
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Noreen Falak
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Gary J Loake
- Institute of Molecular Plant Sciences, University of Edinburgh, King's Buildings, Edinburgh, UK.
| | - Byung-Wook Yun
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea.
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Tan M, Cheng D, Yang Y, Zhang G, Qin M, Chen J, Chen Y, Jiang M. Co-expression network analysis of the transcriptomes of rice roots exposed to various cadmium stresses reveals universal cadmium-responsive genes. BMC PLANT BIOLOGY 2017; 17:194. [PMID: 29115926 PMCID: PMC5678563 DOI: 10.1186/s12870-017-1143-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 10/30/2017] [Indexed: 05/18/2023]
Abstract
BACKGROUND The migration of cadmium (Cd) from contaminated soil to rice is a cause for concern. However, the molecular mechanism underlying the response of rice roots to various Cd stresses remains to be clarified from the viewpoint of the co-expression network at a system-wide scale. RESULTS We employed a comparative RNAseq-based approach to identify early Cd-responsive differentially expressed genes (DEGs) in rice 'Nipponbare' seedling roots after 1 h of high-Cd treatment. A multiplicity of the identified 1772 DEGs were implicated in hormone signaling and transcriptional regulation, particularly NACs and WRKYs were all upregulated under Cd stress. All of the 6 Cd-upregulated ABC transporters were pleiotropic drug resistance proteins (PDRs), whereas all of the 6 ZRT/IRT-like proteins (ZIPs) were consistently downregulated by Cd treatment. To further confirm our results of this early transcriptomic response to Cd exposure, we then conducted weighted gene co-expression network analysis (WGCNA) to re-analyze our RNAseq data in combination with other 11 previously published RNAseq datasets for rice roots exposed to diverse concentrations of Cd for extended treatment periods. This integrative approach identified 271 transcripts as universal Cd-regulated DEGs that are key components of the Cd treatment coupled co-expression module. A global view of the 164 transcripts with annotated functions in pathway networks revealed several Cd-upregulated key functional genes, including transporter ABCG36/OsPDR9, 12-oxo-phytodienoic acid reductases (OPRs) for JA synthesis, and ZIM domain proteins JAZs in JA signaling, as well as OsWRKY10, NAC, and ZFP transcription factors. More importantly, 104 of these, including ABCG36/OsPDR9, OsNAC3, as well as several orthologs in group metalloendoproteinase, plastocyanin-like domain containing proteins and pectin methylesterase inhibitor, may respond specifically to various Cd pressures, after subtracting the 60 general stress-responsive genes reported to be commonly upregulated following multiple stresses. CONCLUSION An integrative approach was implemented to identify DEGs and co-expression network modules in response to various Cd pressures, and 104 of the 164 annotatable universal Cd-responsive DEGs may specifically respond to various Cd pressures. These results provide insight into the universal molecular mechanisms beneath the Cd response in rice roots, and suggest many promising targets for improving the rice acclimation process against Cd toxicity.
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Affiliation(s)
- Mingpu Tan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Dan Cheng
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yuening Yang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Guoqiang Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mengjie Qin
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jun Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Yahua Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingyi Jiang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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