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Shi Y, Jiang J, Ye H, Sheng Y, Zhou Y, Foong SY, Sonne C, Chong WWF, Lam SS, Xie Y, Li J, Ge S. Transforming municipal cotton waste into a multilayer fibre biocomposite with high strength. ENVIRONMENTAL RESEARCH 2023; 218:114967. [PMID: 36455630 DOI: 10.1016/j.envres.2022.114967] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/11/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
We analyzed the problematic textile fiber waste as potential precursor material to produce multilayer cotton fiber biocomposite. The properties of the products were better than the current dry bearing type particleboards and ordinary dry medium-density fiberboard in terms of the static bending strength (67.86 MPa), internal bonding strength (1.52 MPa) and water expansion rate (9.57%). The three-layer, four-layer and five-layer waste cotton fiber composite (WCFC) were tried in the experiment, the mechanical properties of the three-layer WCFC are insufficient, the five-layer WCFC is too thick and the four-layer WCFC had the best comprehensive performance. The cross-section morphology of the four-layer WCFC shows a dense structure with a high number of adhesives attached to the fiber. The hardness and stiffness of the four-layer cotton fiber composite enhanced by the high crystallinity of cellulose content, and several chemical bondings were presence in the composites. Minimum mass loss (30%) and thermal weight loss rate (0.70%/°C) was found for the four-layer WCFC. Overall, our findings suggested that the use of waste cotton fiber (WCF) to prepare biocomposite with desirable physical and chemical properties is feasible, and which can potentially be used as building material, furniture and automotive applications.
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Affiliation(s)
- Yang Shi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Jinxuan Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Haoran Ye
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Yequan Sheng
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Yihui Zhou
- Aerospace Kaitian Environmental Technology Co., Ltd, Changsha 410000, China
| | - Shin Ying Foong
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Christian Sonne
- Aarhus University, Department of Bioscience, Arctic Research Centre (ARC), Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark
| | - William Woei Fong Chong
- Automotive Development Centre (ADC), Institute for Vehicle Systems and Engineering (IVeSE), Universiti Teknologi Malaysia (UTM), Johor Bahru, 81310, Johor, Malaysia
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Automotive Development Centre (ADC), Institute for Vehicle Systems and Engineering (IVeSE), Universiti Teknologi Malaysia (UTM), Johor Bahru, 81310, Johor, Malaysia.
| | - Yanfei Xie
- People's Hospital of Ningxiang City, Ningxiang, Hunan 410600, China
| | - Jianzhang Li
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Shengbo Ge
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Aerospace Kaitian Environmental Technology Co., Ltd, Changsha 410000, China.
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Tong S, Wang Y, Chen N, Wang D, Liu B, Wang W, Chen Y, Liu J, Ma T, Jiang Y. PtoNF-YC9-SRMT-PtoRD26 module regulates the high saline tolerance of a triploid poplar. Genome Biol 2022; 23:148. [PMID: 35799188 PMCID: PMC9264554 DOI: 10.1186/s13059-022-02718-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/25/2022] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Sensing and responding to stresses determine the tolerance of plants to adverse environments. The triploid Chinese white poplar is widely cultivated in North China because of its adaptation to a wide range of habitats including highly saline ones. However, its triploid genome complicates any detailed investigation of the molecular mechanisms underlying its adaptations. RESULTS We report a haplotype-resolved genome of this triploid poplar and characterize, using reverse genetics and biochemical approaches, a MYB gene, SALT RESPONSIVE MYB TRANSCRIPTION FACTOR (SRMT), which combines NUCLEAR FACTOR Y SUBUNIT C 9 (PtoNF-YC9) and RESPONSIVE TO DESICCATION 26 (PtoRD26), to regulate an ABA-dependent salt-stress response signaling. We reveal that the salt-inducible PtoRD26 is dependent on ABA signaling. We demonstrate that ABA or salt drives PtoNF-YC9 shuttling into the nucleus where it interacts with SRMT, resulting in the rapid expression of PtoRD26 which in turn directly regulates SRMT. This positive feedback loop of SRMT-PtoRD26 can rapidly amplify salt-stress signaling. Interference with either component of this regulatory module reduces the salt tolerance of this triploid poplar. CONCLUSION Our findings reveal a novel ABA-dependent salt-responsive mechanism, which is mediated by the PtoNF-YC9-SRMT-PtoRD26 module that confers salt tolerance to this triploid poplar. These genes may therefore also serve as potential and important modification targets in breeding programs.
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Affiliation(s)
- Shaofei Tong
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Yubo Wang
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Ningning Chen
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Deyan Wang
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Bao Liu
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Weiwei Wang
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Yang Chen
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China
| | - Jianquan Liu
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China.
| | - Tao Ma
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China.
| | - Yuanzhong Jiang
- Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, China.
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Comprehensive Analyses of Four PtoNF-YC Genes from Populus tomentosa and Impacts on Flowering Timing. Int J Mol Sci 2022; 23:ijms23063116. [PMID: 35328537 PMCID: PMC8950544 DOI: 10.3390/ijms23063116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 12/10/2022] Open
Abstract
Flowering is an important link in the life process of angiosperms, and it is also an important sign of the transformation of plants from vegetative to reproductive growth. Although the flowering regulation network of Arabidopsis is well-understood, there has been little research on the molecular mechanisms of perennial woody plant flower development regulation. Populus tomentosa is a unique Chinese poplar species with fast growth, strong ecological adaptability, and a long lifecycle. However, it has a long juvenile phase, which seriously affects its breeding process. Nuclear factor-Y (NF-Y) is an important type of transcription factor involved in the regulation of plant flowering. However, there are few reports on PtoNF-Y gene flowering regulation, and the members of the PtNF-YC subfamily are unknown. In this study, four key genes were cloned and analyzed for sequence characteristics, gene structure, genetic evolution, expression patterns, and subcellular localization. The plant expression vector was further constructed, and transgenic Arabidopsis and P. tomentosa plants were obtained through genetic transformation and a series of molecular tests. The flowering time and other growth characteristics were analyzed. Finally, the expression level of flowering genes was detected by quantitative PCR, the interaction between PtoNF-YC and PtoCOL proteins was measured using the yeast two-hybrid system to further explain the flowering regulation mechanism, and the molecular mechanisms by which PtNF-YC6 and PtNF-YC8 regulate poplar flowering were discussed. These results lay the foundation for elucidating the molecular regulation mechanism of PtoNF-YC in flowering and furthering the molecular design and breeding of poplar, while providing a reference for other flowering woody plants.
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Bian W, Liu X, Zhang Z, Zhang H. Transcriptome analysis of diploid and triploid Populus tomentosa. PeerJ 2020; 8:e10204. [PMID: 33194408 PMCID: PMC7602689 DOI: 10.7717/peerj.10204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/28/2020] [Indexed: 11/30/2022] Open
Abstract
Triploid Chinese white poplar (Populus tomentosa Carr., Salicaceae) has stronger advantages in growth and better stress resistance and wood quality than diploid P. tomentosa. Using transcriptome sequencing technology to identify candidate transcriptome-based markers for growth vigor in young tree tissue is of great significance for the breeding of P. tomentosa varieties in the future. In this study, the cuttings of diploid and triploid P. tomentosa were used as plant materials, transcriptome sequencing was carried out, and their tissue culture materials were used for RT-qPCR verification of the expression of genes. The results showed that 12,240 differentially expressed genes in diploid and triploid P. tomentosa transcripts were annotated and enriched into 135 metabolic pathways. The top six pathways that enriched the most significantly different genes were plant-pathogen interaction, phenylpropanoid biosynthesis, MAPK signalling pathway-plant, ascorbate and aldarate metabolism, diterpenoid biosynthesis, and the betalain biosynthesis pathway. Ten growth-related genes were selected from pathways of plant hormone signal transduction and carbon fixation in photosynthetic organisms for RT-qPCR verification. The expression levels of MDH and CYCD3 in tissue-cultured and greenhouse planted triploid P. tomentosa were higher than those in tissue-cultured diploid P. tomentosa, which was consist ent with the TMM values calculated by transcriptome.
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Affiliation(s)
- Wen Bian
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, Yunnan, China
| | - Xiaozhen Liu
- Key Laboratory of Biodiversity Conservation in Southwest China, State Forest Administration, Southwest Forestry University, Kunming, Yunnan, China
| | - Zhiming Zhang
- Key Laboratory of Biodiversity Conservation in Southwest China, State Forest Administration, Southwest Forestry University, Kunming, Yunnan, China
| | - Hanyao Zhang
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, Yunnan, China
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Li J, Gao K, Yang X, Khan WU, Guo B, Guo T, An X. Identification and characterization of the CONSTANS-like gene family and its expression profiling under light treatment in Populus. Int J Biol Macromol 2020; 161:999-1010. [PMID: 32531358 DOI: 10.1016/j.ijbiomac.2020.06.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/21/2020] [Accepted: 06/07/2020] [Indexed: 10/24/2022]
Abstract
The CONSTANS-like (COL) genes play an important role in the photoperiodic flowering pathway. Poplar is a perennial woody plant with a long juvenile phase, but the molecular characterization of COL genes in Populus is limited. In this study, 14 COL genes were identified in the Populus genome. Phylogenetic analysis indicated the PtCOL proteins were divided into three subgroups, and the members of each subgroup had similar gene structure and motif composition. Chromosome distribution analysis showed that 14 PtCOL genes were distributed on 10 chromosomes. Multiple sequence alignment indicated that these proteins contained a highly conserved B-box1 and a conserved CCT domain, but the B-box2 structure was divided into three different types. Promoter analysis found that there were several light-responsive cis-elements in the PtCOL genes. Furthermore, tissue-specific expression showed that all nine PtCOL genes were widely expressed in various tissues and organs of Populus, and were preferentially expressed in the leaves. Additionally, the transcription level of PtCOL exhibited a diurnal oscillation pattern in different light conditions. This study not only provided comprehensive information for further analysis of the function of the PtCOL gene family, but also revealed the biological roles of PtCOL genes in the photoperiod-dependent flowering process of Populus.
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Affiliation(s)
- Juan Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Kai Gao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Xiaoyu Yang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Wasif Ullah Khan
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Bin Guo
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China; Shanxi Academy of Forest Sciences, Taiyuan, Shanxi 030012, China
| | - Ting Guo
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
| | - Xinmin An
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China.
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Altered sucrose metabolism and plant growth in transgenic Populus tomentosa with altered sucrose synthase PtSS3. Transgenic Res 2019; 29:125-134. [PMID: 31853721 DOI: 10.1007/s11248-019-00184-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 12/13/2019] [Indexed: 11/27/2022]
Abstract
Improvement of wood quality is an important focus of forest genetics and breeding research. Sucrose synthase (SS) catalyzes the reaction of sucrose and uridine diphosphate into uridine diphosphate glucose and fructose. It is a key enzyme involved in cell wall formation during secondary growth by providing the UDP-Glucose substrate for cellulose biosynthesis. In this study, we isolated the single-copy gene PtSS3 from the SS gene family of Populus tomentosa and analyzed its structure. To identify its function in secondary growth, we generated 19 transgenic lines of P. tomentosa using PtSS3 overexpression (OE) and artificial microRNA (amiRNA) constructs. We also performed comprehensive analyses of the transgenic P. tomentosa plants, including phenotypic analyses, quantitative real-time PCR, enzyme activity assays and sugar metabolism. We found significantly higher PtSS3 enzyme activity, fructose, and glucose levels and significantly lower sucrose levels in the stems and leaves of OE-PtSS3 plants. The opposite trend was observed in the amiRNA-PtSS3 lines. Gene expression analyses showed that PtSS3 transcript levels in stems and leaves were up-regulated in the OE-PtSS3 lines and down-regulated in the amiRNA-PtSS3 lines, and the OE-PtSS3 plants grew taller than the wild-type and amiRNA-PtSS3 plants. These findings indicate that PtSS3 plays an important role in sucrose metabolism and growth of trees.
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Genome-wide analysis of purple acid phosphatase (PAP) family proteins in Jatropha curcas L. Int J Biol Macromol 2019; 123:648-656. [DOI: 10.1016/j.ijbiomac.2018.11.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/30/2018] [Accepted: 11/06/2018] [Indexed: 11/22/2022]
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8
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Zhai X, Niu S, Ren Y, Fan G. Discovery and profiling of microRNAs and their targets in Paulownia ‘Yuza 1’ plants via high-throughput sequencing and degradome analysis. Genes Genomics 2016. [DOI: 10.1007/s13258-016-0420-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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An X, Chen Z, Wang J, Ye M, Ji L, Wang J, Liao W, Ma H. Identification and characterization of the Populus sucrose synthase gene family. Gene 2014; 539:58-67. [PMID: 24508272 DOI: 10.1016/j.gene.2014.01.062] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 01/14/2014] [Accepted: 01/24/2014] [Indexed: 12/11/2022]
Abstract
In this study, we indentified 15 sucrose synthase (SS) genes in Populus and the results of RT-qPCR revealed that their expression patterns were constitutive and partially overlapping but diverse. The release of the most recent Populus genomic data in Phytozome v9.1 has revealed the largest SS gene family described to date, comprising 15 distinct members. This information will now enable the analysis of transcript expression profiles for those that have not been previously reported. Here, we performed a comprehensive analysis of SS genes in Populus by describing the gene structure, chromosomal location and phylogenetic relationship of each family member. A total of 15 putative SS gene members were identified in the Populus trichocarpa (Torr. & Gray) genome using the SS domain and amino acid sequences from Arabidopsis thaliana as a probe. A phylogenetic analysis indicated that the 15 members could be classified into four groups that fall into three major categories: dicots, monocots & dicots 1 (M & D 1), and monocots & dicots 2 (M & D 2). In addition, the 15 SS genes were found to be unevenly distributed on seven chromosomes. The two conserved domains (sucrose synthase and glycosyl transferase) were found in this family. Meanwhile, the expression profiles of all 15 gene members in seven different organs were investigated in Populus tomentosa (Carr.) by using RT-qPCR. Additional analysis indicated that the poplar SS gene family is also involved in response to water-deficit. The current study provides basic information that will assist in elucidating the functions of poplar SS family.
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Affiliation(s)
- Xinmin An
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China.
| | - Zhong Chen
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
| | - Jingcheng Wang
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China; Chinese Academy for Environmental Planning, Ministry of Environmental Protection of the People's Republic of China, Beijing 100012, China
| | - Meixia Ye
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
| | - Lexiang Ji
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
| | - Jia Wang
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
| | - Weihua Liao
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
| | - Huandi Ma
- National Engineering Laboratory for Tree Breeding, NDRC, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghua East Road No.35, Haidian District, Beijing 100083, China
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Diola V, Brito GG, Caixeta ET, Pereira LFP, Loureiro ME. A new set of differentially expressed signaling genes is early expressed in coffee leaf rust race II incompatible interaction. Funct Integr Genomics 2013; 13:379-89. [PMID: 23835851 DOI: 10.1007/s10142-013-0330-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Revised: 06/11/2013] [Accepted: 06/25/2013] [Indexed: 01/23/2023]
Abstract
New races of coffee rust are overcoming resistance genes available in germplasm and cultivated cultivars and bringing recently some coffee-producing countries in severe economic challenge. The objective of this study was to identify the genes that are linked to host resistance to the major coffee rust race II. In our study, we have identified and studied a segregating population that has a single monogenic resistant gene to coffee rust. Coffee leaves of parents, resistant, and susceptible genotypes of the F2 generation plants were inoculated with pathogen spores. A differential analysis was performed by combined cDNA-AFLP and bulk segregant analysis (BSA) in pooled samples collected 48 and 72 h postinoculation, increasing the selectiveness for differential gene expression. Of 108 differential expressed genes, between 33,000 gene fragments analyzed, 108 differential expressed genes were identified in resistant plants. About 20 and 22 % of these resistant-correlated genes are related to signaling and defense genes, respectively. Between signaling genes, the major subclass corresponds to receptor and resistant homolog genes, like nucleotide-binding site leucine-rich repeat (NBS-LRR), Pto-like, RLKs, Bger, and RGH1A, all not previously described in coffee rust responses. The second major subclass included kinases, where two mitogen-activated kinases (MAPK) are identified. Further gene expression analysis was performed for 21 selected genes by real-time PCR gene expression analysis at 0, 12, 24, 48, and 72 h postinoculation. The expression of genes involved in signaling and defense was higher at 24 and 72 h after inoculation, respectively. The NBS-LRR was the more differentially expressed gene between the signaling genes (four times more expressed in the resistant genotype), and thraumatin (PR5) was the more expressed between all genes (six times more expressed). Multivariate analysis reinforces the significance of the temporal separation of identified signaling and defense genes: early expression of signaling genes support the hypothesis that higher expression of the signaling components up regulates the defense genes identified. Additionally the increased gene expression of these two gene sets is associated with a single monogenic resistance trait to to leaf coffee rust in the interaction characterized here.
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Affiliation(s)
- Valdir Diola
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
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Zheng HQ, Zhang Q, Li HX, Lin SZ, An XM, Zhang ZY. Over-expression of the triploid white poplar PtDrl01 gene in tobacco enhances resistance to tobacco mosaic virus. PLANT BIOLOGY (STUTTGART, GERMANY) 2011; 13:145-53. [PMID: 21143735 DOI: 10.1111/j.1438-8677.2010.00327.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A full-length cDNA, designated as the Populus tomentosa disease resistance-like 01 (PtDrl01) gene, was isolated from triploid white poplar [(Populus tomentosa × P. bolleana) × P. tomentosa]. The protein thought to be produced by the PtDrl01 gene contains a nuclear localisation sequence (NLS), a toll/interleukin-1 receptor (TIR) homologue region, a nucleotide binding site (NBS) and a leucine-rich repeat (LRR) domain. The protein also exhibits a considerable degree of homology to N-like resistance proteins. Real-time quantitative RT-PCR analysis revealed that expression of the PtDrl01 gene in triploid white poplar leaves could be induced by two defence signalling molecules: methyl jasmonate (MeJA) and salicylic acid (SA). Over-expression of the PtDrl01 gene in transgenic tobacco induced enhanced resistance to tobacco mosaic virus (TMV). Long-term resistance from the PtDrl01 gene to TMV infection was also observed in transgenic tobacco plants. Additionally, over-expression of the PtDrl01 gene resulted in transcriptional changes in genes expressing pathogenesis-related proteins in transgenic tobacco under non-stress conditions. These data strongly suggest that the PtDrl01 gene is involved in plant defence responses to pathogen infection.
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Affiliation(s)
- H-Q Zheng
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding of Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing, China
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Zhang Q, Wang C, Tian J, Li K, Shou H. Identification of rice purple acid phosphatases related to phosphate starvation signalling. PLANT BIOLOGY (STUTTGART, GERMANY) 2011; 13:7-15. [PMID: 21143719 DOI: 10.1111/j.1438-8677.2010.00346.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Purple acid phosphatases (PAPs) are a family of metallo-phosphoesterases involved in a variety of physiological functions, especially phosphate deficiency adaptations in plants. We identified 26 putative PAP genes by a genome-wide analysis of rice (Oryza sativa), 24 of which have isolated EST sequences in the dbEST database. Amino acid sequence analysis revealed that 25 of these genes possess sets of metal-ligating residues typical of known PAPs. Phylogenetic analysis classified the 26 rice and 29 Arabidopsis PAPs into three main groups and seven subgroups. We detected transcripts of 21 PAP genes in roots or leaves of rice seedlings. The expression levels of ten PAP genes were up-regulated by both phosphate deprivation and over-expression of the transcription factor OsPHR2. These PAP genes all contained one or two OsPHR2 binding elements in their promoter regions, implying that they are directly regulated by OsPHR2. Both acid phosphatase (AP) and surface secretory acid phosphatase (SAP) activity assays showed that the up-regulation of PAPs by Pi starvation, OsPHR2 over-expression, PHO2 knockout or OsSPX1 RNA interference led to an increase in AP and SAP activity in rice roots. This study reveals the potential for developing technologies for crop improvement in phosphorus use efficiency.
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Affiliation(s)
- Q Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou, China
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An XM, Wang DM, Wang ZL, Li B, Bo WH, Cao GL, Zhang ZY. Isolation of a LEAFY homolog from Populus tomentosa: expression of PtLFY in P. tomentosa floral buds and PtLFY-IR-mediated gene silencing in tobacco (Nicotiana tabacum). PLANT CELL REPORTS 2011; 30:89-100. [PMID: 21104255 DOI: 10.1007/s00299-010-0947-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 10/24/2010] [Accepted: 10/28/2010] [Indexed: 05/30/2023]
Abstract
To understand the genetic and molecular mechanisms underlying floral development in Populus tomentosa, we isolated PtLFY, a LEAFY homolog, from a P. tomentosa floral bud cDNA library. DNA gel blot analysis showed that PtLFY is present as a single copy in the genomes of both male and female individuals of P. tomentosa. The genomic copy is composed of three exons and two introns. Relative expression levels of PtLFY in tissues of P. tomentosa were estimated by RT-PCR; our results revealed that PtLFY mRNA is highly abundant in roots and both male and female floral buds. A low level of gene expression was detected in stems and vegetative buds, and no PtLFY-specific transcripts were detected in leaves. PtLFY expression patterns were analyzed during the development of both male and female floral buds in P. tomentosa via real-time quantitative RT-PCR. Continuous, stable and high-level expression of PtLFY-specific mRNA was detected in both male and female floral buds from September 13th to February 25th, but the level of PtLFY transcripts detected in male floral buds was considerably higher than in female floral buds. Our results also showed an inverted repeat PtLFY fragment (PtLFY-IR) effectively blocked flowering of transgenic tobacco plants, and that this effect appeared to be due to post-transcriptional silencing of the endogenous tobacco LFY homologs NFL1 and NFL2.
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Affiliation(s)
- Xin-Min An
- National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing 100083, People's Republic of China
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Zheng H, Lin S, Zhang Q, Lei Y, Hou L, Zhang Z. Functional identification and regulation of the PtDrl02 gene promoter from triploid white poplar. PLANT CELL REPORTS 2010; 29:449-60. [PMID: 20179934 DOI: 10.1007/s00299-010-0834-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 02/04/2010] [Accepted: 02/08/2010] [Indexed: 05/28/2023]
Abstract
The PtDrl02 gene belongs to the TIR-NBS gene family in triploid white poplar (Populus tomentosa x P. bolleana) x P. tomentosa. Its expression pattern displays tissue-specificity, and the transcript level can be induced by wounding, methyl jasmonate (MeJA), and salicylic acid (SA). To understand the regulatory mechanism controlling PtDrl02 gene expression, we functionally characterized the PtDrl02 promoter region. Using the beta-glucuronidase as a reporter, we found that the PtDrl02 promoter directed gene expression mainly in the aerial parts of the plants and was confined to the cortex tissues of leaf veins, petioles, stems, and stem piths, showing a typical tissue-specific expression pattern. Deletion analysis revealed two positive regulatory regions (-985 to -669 and -669 to -467) responsible for the basal activity of the PtDrl02 promoter. Impressively, the sequence from -669 to -467 was shown to contain cis-element (s) responding to wounding and MeJA, while the promoter region between -244 and 0 could individually display wounding-responsiveness, and the fragment from -467 to -244 was required for SA- and NaCl-inducible expression of the PtDrl02 promoter. Additionally, it was found that the -985 to -669 sequence was the ABA-responding promoter fragment. These results suggested that the PtDrl02 promoter was modulated by multiple cis-regulatory elements in distinct and complex patterns to regulate PtDrl02 gene expression. Our study also suggested that the PtDrl02 gene 5' untranslated region, as well as a Populus WRKY transcription factor, PtWRKY1, was involved in the regulation of PtDrl02 promoter activities.
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Affiliation(s)
- Huiquan Zheng
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing, People's Republic of China
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15
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Zheng H, Lin S, Zhang Q, Lei Y, Zhang Z. Functional analysis of 5' untranslated region of a TIR-NBS-encoding gene from triploid white poplar. Mol Genet Genomics 2009; 282:381-94. [PMID: 19618215 DOI: 10.1007/s00438-009-0471-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2009] [Accepted: 07/01/2009] [Indexed: 11/27/2022]
Abstract
Genome-wide analyses have identified a set of TIR-NBS-encoding genes in plants. However, the molecular mechanism underlying the expression of these genes is still unknown. In this study, we presented a TIR-NBS-encoding gene, PtDrl02, that displayed a low level of tissue-specific expression in a triploid white poplar [(Populus tomentosa x P. bolleana) x P. tomentosa], and analyzed the effects of the 5' untranslated region (UTR) on gene expression. The 5' UTR sequence repressed the reporter activity of beta-glucuronidase (GUS) gene under PtDrl02 promoter by 113.5-fold with a staining ratio of 2.97% in the transgenic tobacco plants. Quantitative RT-PCR assays revealed that the 5' UTR sequence decreased the transcript level of the GUS reporter gene by 13.3-fold, implying a regulatory role of 5' UTR in transcription and/or mRNA destabilization. The comparison of GUS activity with the transcript abundance indicated that the 5' UTR sequence decreased the translation efficiency of target gene by 88.3%. Additionally, the analysis of the transgenic P-985/UTRDelta/GUS plants showed that both the exon1 sequence and the leading intron within the 5' UTR region were responsible for the regulation of gene expression. Our results suggested a negative effect of the 5' UTR of PtDrl02 gene on gene expression.
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Affiliation(s)
- Huiquan Zheng
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing 100083, People's Republic of China
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