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Wan JN, Mbari NJ, Wang SW, Liu B, Mwangi BN, Rasoarahona JR, Xin HP, Zhou YD, Wang QF. Modeling impacts of climate change on the potential distribution of six endemic baobab species in Madagascar. Plant Divers 2021; 43:117-124. [PMID: 33997544 PMCID: PMC8103343 DOI: 10.1016/j.pld.2020.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 05/12/2023]
Abstract
Madagascar, a globally renowned biodiversity hotspot characterized by high rates of endemism, is one of the few remaining refugia for many plants and animal species. However, global climate change has greatly affected the natural ecosystem and endemic species living in Madagascar, and will likely continue to influence species distribution in the future. Madagascar is home to six endemic baobab (Adansonia spp., Bombacoideae [Malvaceae]) species (Adansonia grandidieri, A. suarezensis, A. madagascariensis, A. perrieri, A. rubrostipa, A. za), which are remarkable and endangered plants. This study aimed to model the current distribution of suitable habitat for each baobab species endemic to Madagascar and determine the effect that climate change will have on suitable baobab habitat by the years 2050 and 2070. The distribution was modeled using MaxEnt based on locality information of 245 occurrence sites of six species from both online database and our own field work. A total of seven climatic variables were used for the modeling process. The present distribution of all six Madagascar's baobabs was largely influenced by temperature-related factors. Although both expansion and contraction of suitable habitat are predicted for all species, loss of original suitable habitat is predicted to be extensive. For the most widespread Madagascar baobab, A. za, more than 40% of its original habitat is predicted to be lost because of climate change. Based on these findings, we recommend that areas predicted to contract in response to climate change should be designated key protection regions for baobab conservation.
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Affiliation(s)
- Jun-Nan Wan
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
| | - Ndungu J. Mbari
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Sheng-Wei Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Bing Liu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
| | - Brian N. Mwangi
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Jean R.E. Rasoarahona
- High School of Agricultural Sciences, University of Antananarivo, P.O. Box 175, Madagascar
| | - Hai-Ping Xin
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
| | - Ya-Dong Zhou
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
| | - Qing-Feng Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China
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Wan T, Liu ZM, Li LF, Leitch AR, Leitch IJ, Lohaus R, Liu ZJ, Xin HP, Gong YB, Liu Y, Wang WC, Chen LY, Yang Y, Kelly LJ, Yang J, Huang JL, Li Z, Liu P, Zhang L, Liu HM, Wang H, Deng SH, Liu M, Li J, Ma L, Liu Y, Lei Y, Xu W, Wu LQ, Liu F, Ma Q, Yu XR, Jiang Z, Zhang GQ, Li SH, Li RQ, Zhang SZ, Wang QF, Van de Peer Y, Zhang JB, Wang XM. A genome for gnetophytes and early evolution of seed plants. Nat Plants 2018; 4:82-89. [PMID: 29379155 DOI: 10.1038/s41477-017-0097-2] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 12/27/2017] [Indexed: 05/07/2023]
Abstract
Gnetophytes are an enigmatic gymnosperm lineage comprising three genera, Gnetum, Welwitschia and Ephedra, which are morphologically distinct from all other seed plants. Their distinctiveness has triggered much debate as to their origin, evolution and phylogenetic placement among seed plants. To increase our understanding of the evolution of gnetophytes, and their relation to other seed plants, we report here a high-quality draft genome sequence for Gnetum montanum, the first for any gnetophyte. By using a novel genome assembly strategy to deal with high levels of heterozygosity, we assembled >4 Gb of sequence encoding 27,491 protein-coding genes. Comparative analysis of the G. montanum genome with other gymnosperm genomes unveiled some remarkable and distinctive genomic features, such as a diverse assemblage of retrotransposons with evidence for elevated frequencies of elimination rather than accumulation, considerable differences in intron architecture, including both length distribution and proportions of (retro) transposon elements, and distinctive patterns of proliferation of functional protein domains. Furthermore, a few gene families showed Gnetum-specific copy number expansions (for example, cellulose synthase) or contractions (for example, Late Embryogenesis Abundant protein), which could be connected with Gnetum's distinctive morphological innovations associated with their adaptation to warm, mesic environments. Overall, the G. montanum genome enables a better resolution of ancestral genomic features within seed plants, and the identification of genomic characters that distinguish Gnetum from other gymnosperms.
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Affiliation(s)
- Tao Wan
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
- Sino-Africa Joint Research Centre, Chinese Academy of Science, Wuhan, China
| | - Zhi-Ming Liu
- Novogene Bioinformatics Institute, Beijing, China
| | - Ling-Fei Li
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Andrew R Leitch
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | | | - Rolf Lohaus
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Centre for Plant Systems Biology, VIB, Ghent, Belgium
| | - Zhong-Jian Liu
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, National Orchid Conservation Centre of China and Orchid Conservation and Research Centre, Shenzhen, China
| | - Hai-Ping Xin
- Sino-Africa Joint Research Centre, Chinese Academy of Science, Wuhan, China
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Yan-Bing Gong
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Yang Liu
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Wen-Cai Wang
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | - Ling-Yun Chen
- Sino-Africa Joint Research Centre, Chinese Academy of Science, Wuhan, China
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Yong Yang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Laura J Kelly
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | - Ji Yang
- Education Key Laboratory for Biodiversity Science and Ecological Engineering, Fudan University, Shanghai, China
| | - Jin-Ling Huang
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Henan University, Kaifeng, China
- Department of Biology, East Carolina University, Greenville, NC, USA
| | - Zhen Li
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Centre for Plant Systems Biology, VIB, Ghent, Belgium
| | - Ping Liu
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Li Zhang
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Hong-Mei Liu
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Hui Wang
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Shu-Han Deng
- Novogene Bioinformatics Institute, Beijing, China
| | - Meng Liu
- Novogene Bioinformatics Institute, Beijing, China
| | - Ji Li
- Novogene Bioinformatics Institute, Beijing, China
| | - Lu Ma
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | - Yan Liu
- Novogene Bioinformatics Institute, Beijing, China
| | - Yang Lei
- Novogene Bioinformatics Institute, Beijing, China
| | - Wei Xu
- Novogene Bioinformatics Institute, Beijing, China
| | - Ling-Qing Wu
- Novogene Bioinformatics Institute, Beijing, China
| | - Fan Liu
- Sino-Africa Joint Research Centre, Chinese Academy of Science, Wuhan, China
| | - Qian Ma
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Xin-Ran Yu
- Novogene Bioinformatics Institute, Beijing, China
| | - Zhi Jiang
- Novogene Bioinformatics Institute, Beijing, China
| | - Guo-Qiang Zhang
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, National Orchid Conservation Centre of China and Orchid Conservation and Research Centre, Shenzhen, China
| | - Shao-Hua Li
- Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Rui-Qiang Li
- Novogene Bioinformatics Institute, Beijing, China
| | - Shou-Zhou Zhang
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China
| | - Qing-Feng Wang
- Sino-Africa Joint Research Centre, Chinese Academy of Science, Wuhan, China.
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China.
| | - Yves Van de Peer
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.
- Centre for Plant Systems Biology, VIB, Ghent, Belgium.
- Genomics Research Institute, University of Pretoria, Pretoria, South Africa.
| | - Jin-Bo Zhang
- Novogene Bioinformatics Institute, Beijing, China.
| | - Xiao-Ming Wang
- Key Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Science, Shenzhen, China.
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Wu BH, Cao YG, Guan L, Xin HP, Li JH, Li SH. Genome-wide transcriptional profiles of the berry skin of two red grape cultivars (Vitis vinifera) in which anthocyanin synthesis is sunlight-dependent or -independent. PLoS One 2014; 9:e105959. [PMID: 25158067 PMCID: PMC4144973 DOI: 10.1371/journal.pone.0105959] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 07/27/2014] [Indexed: 11/19/2022] Open
Abstract
Global gene expression was analyzed in the berry skin of two red grape cultivars, which can ('Jingyan') or cannot ('Jingxiu') synthesize anthocyanins after sunlight exclusion from fruit set until maturity. Gene transcripts responding to sunlight exclusion in 'Jingyan' were less complex than in 'Jingxiu'; 528 genes were induced and 383 repressed in the former, whereas 2655 genes were induced and 205 suppressed in 'Jingxiu'. They were regulated either in the same or opposing manner in the two cultivars, or in only one cultivar. In addition to VvUFGT and VvMYBA1, some candidate genes (e.g. AOMT, GST, and ANP) were identified which are probably involved in the differential responses of 'Jingxiu' and 'Jingyan' to sunlight exclusion. In addition, 26 MYB, 14 bHLH and 23 WD40 genes responded differently to sunlight exclusion in the two cultivars. Interestingly, all of the 189 genes classified as being relevant to ubiquitin-dependent protein degradation were down-regulated by sunlight exclusion in 'Jingxiu', but the majority (162) remained unchanged in 'Jingyan' berry skin. It would be of interest to determine the precise role of the ubiquitin pathway following sunlight exclusion, particularly the role of COP9 signalosome, cullins, RING-Box 1, and COP1-interacting proteins. Only a few genes in the light signal system were found to be regulated by sunlight exclusion in either or both cultivars. This study provides a valuable overview of the transcriptome changes and gives insight into the genetic background that may be responsible for sunlight-dependent versus -independent anthocyanin biosynthesis in berry skin.
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Affiliation(s)
- Ben-Hong Wu
- Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing, P. R. China
| | - Yue-Gang Cao
- Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Le Guan
- Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Hai-Ping Xin
- Key Laboratory of Plant Germplasm Enhancement and Speciality Agriculture, Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan, P. R. China
| | - Ji-Hu Li
- Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing, P. R. China
| | - Shao-Hua Li
- Beijing Key Laboratory of Grape Science and Enology, and CAS Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of Sciences, Beijing, P. R. China
- Key Laboratory of Plant Germplasm Enhancement and Speciality Agriculture, Wuhan Botanical Garden, The Chinese Academy of Sciences, Wuhan, P. R. China
- * E-mail:
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Wu JJ, Peng XB, Li WW, He R, Xin HP, Sun MX. Mitochondrial GCD1 dysfunction reveals reciprocal cell-to-cell signaling during the maturation of Arabidopsis female gametes. Dev Cell 2012; 23:1043-58. [PMID: 23085019 DOI: 10.1016/j.devcel.2012.09.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 06/11/2012] [Accepted: 09/17/2012] [Indexed: 12/27/2022]
Abstract
Cell-to-cell communication in embryo sacs is thought to regulate the development of female gametes in flowering plants, but the details remain poorly understood. Here, we report a mitochondrial protein, GAMETE CELL DEFECTIVE 1 (GCD1), enriched in gametophytes that is essential for final maturation of female gametes. Using Arabidopsis gcd1 mutants, we found that final maturation of the egg and central cells is not required for double fertilization but is necessary for embryogenesis initiation and endosperm development. Furthermore, nonautonomous effects, observed when GCD1 or AAC2 function is disrupted, suggest that mitochondrial function influences reciprocal signaling between central and egg cells to regulate maturation of the partner (egg or central) cell. Our findings confirm that cell-to-cell communication is important in functional maturation of female gametic cells and suggest that both egg and central cells sense and transmit their mitochondrial metabolic status as an important cue that regulates the coordination of gamete maturation.
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Affiliation(s)
- Jian-Jun Wu
- Department of Cell and Development Biology, College of Life Science, State Key Laboratory of Plant Hybrid Rice, Wuhan University, Wuhan 430072, China
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Abstract
During early embryogenesis in mammals and higher plants, the maternal-to-zygotic transition (MZT) marks the turnover of developmental control from maternal products to de novo zygotic genome transcripts. Intensive studies in animals indicate that early embryonic development is largely maternally controlled. In recent years, the MZT has drawn the attention of botanists, as it is important for understanding the mechanism of embryogenesis and hybrid vigor. In this study, we present a brief overview of some aspects of the MZT in flowering plants. Based on what we have learned from Nicotiana tabacum, we hypothesize that the MZT occurs before zygotic cell division and that the development of the fertilized egg cell in flowering plants can be divided into two phases: the zygote stage, which is mainly controlled maternally, and the one-celled proembryo stage, in which zygotic genome activation (ZGA) occurs and is required for zygote division.
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Affiliation(s)
- Hai-Ping Xin
- Department of Cell and Developmental Biology, College of Life Sciences, Wuhan University, Wuhan 430072, China
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Zhang JE, Luo A, Xin HP, Zhao J, Li SS, Qu LH, Ma LG, Scholten S, Sun MX. Genes of both parental origins are differentially involved in early embryogenesis of a tobacco interspecies hybrid. PLoS One 2011; 6:e23153. [PMID: 21829711 PMCID: PMC3150392 DOI: 10.1371/journal.pone.0023153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 07/12/2011] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND In animals, early embryonic development is largely dependent on maternal transcripts synthesized during gametogenesis. However, in higher plants, the extent of maternal control over zygote development and early embryogenesis is not fully understood yet. Nothing is known about the activity of the parental genomes during seed formation of interspecies hybrids. METHODOLOGY/PRINCIPAL FINDINGS Here, we report that an interspecies hybridization system between SR1 (Nicotiana tabacum) and Hamayan (N. rustica) has been successfully established. Based on the system we selected 58 genes that have polymorphic sites between SR1 and Hamayan, and analyzed the allele-specific expression of 28 genes in their hybrid zygotes (Hamayan x SR1). Finally the allele-specific expressions of 8 genes in hybrid zygotes were repeatedly confirmed. Among them, 4 genes were of paternal origin, 1 gene was of maternal origin and 3 genes were of biparental origin. These results revealed obvious biparental involvement and differentially contribution of parental-origin genes to zygote development in the interspecies hybrid. We further detected the expression pattern of the genes at 8-celled embryo stage found that the involvement of the parental-origin genes may change at different stages of embryogenesis. CONCLUSIONS/SIGNIFICANCE We reveal that genes of both parental origins are differentially involved in early embryogenesis of a tobacco interspecies hybrid and functions in a developmental stage-dependent manner. This finding may open a window to seek for the possible molecular mechanism of hybrid vigor.
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Affiliation(s)
- Jun-E Zhang
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
- College of Life Science, Jiangxi Normal University, Nanchang, China
| | - An Luo
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Hai-Ping Xin
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Jing Zhao
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Shi-Sheng Li
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Liang-Huan Qu
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Li-Gang Ma
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
| | - Stefan Scholten
- Biocenter Klein Flottbek, Developmental Biology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Meng-Xiang Sun
- Key Laboratory of Ministry of Education for Plant Development Biology, College of Life Science, Wuhan University, Wuhan, China
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Xin HP, Peng XB, Ning J, Yan TT, Ma LG, Sun MX. Expressed sequence-tag analysis of tobacco sperm cells reveals a unique transcriptional profile and selective persistence of paternal transcripts after fertilization. Sex Plant Reprod 2011; 24:37-46. [PMID: 20981558 DOI: 10.1007/s00497-010-0151-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 10/11/2010] [Indexed: 11/26/2022]
Abstract
Transcript analysis of male gametes of Nicotiana tabacum was conducted to gather gene expression data regarding the specialization of male germ cells and transmission of paternal transcripts during fertilization. We constructed a tobacco sperm cell cDNA library yielding 1,864 expressed sequence tags representing 1,050 clusters; 37.2% of these clusters have no homologs in GenBank, and 42% did not match any functionally classified protein. A comparative analysis of tobacco sperm transcripts with those of Arabidopsis and maize confirms that some genes are conserved in sperm specialization, while some are distinct to tobacco germline cells. Using reverse transcription-PCR (RT-PCR) of selected transcripts, we evaluated expression of sperm-obtained sequences in vegetative tissue, isolated egg cells, zygotes, and two-celled proembryos, identifying sperm cell-specific transcripts as potential markers for fertilization analysis. We further confirmed that two clusters of sperm transcripts were detected in zygotes about 10 h after fertilization, offering new examples of apparently paternally transmitted transcripts that may be involved in egg cell activation and/or early embryogenesis.
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Affiliation(s)
- Hai-Ping Xin
- Key Laboratory of the Ministry of Education for Plant Developmental Biology, College of Life Science, Wuhan University, Wuhan, China
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Xin H, Sun M. What we have learned from transcript profile analyses of male and female gametes in flowering plants. Sci China Life Sci 2010; 53:927-33. [PMID: 20821291 DOI: 10.1007/s11427-010-4033-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Accepted: 06/21/2010] [Indexed: 11/30/2022]
Abstract
Double fertilization is one of the predominant features of sexual reproduction in flowering plants but, because of the physical inaccessibility of gametes, the essential molecular mechanisms in these processes are largely unknown. Based on the techniques for isolating highly purified gametes from several species and well-developed methods for manipulating RNA from limited quantities of gametes, genome-wide investigations of gamete transcription profiles were recently conducted in flowering plants. In this review, we survey the accumulated knowledge on gamete collection and purification, cDNA library construction, and transcript profile analysis to assess our understanding of the molecular mechanisms of gamete specialization and fertilization.
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Affiliation(s)
- HaiPing Xin
- Key Laboratory of the Ministry of Education for Plant Developmental Biology, College of Life Science, Wuhan University, Wuhan, China
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Ning J, Peng XB, Qu LH, Xin HP, Yan TT, Sun M. Differential gene expression in egg cells and zygotes suggests that the transcriptome is restructed before the first zygotic division in tobacco. FEBS Lett 2006; 580:1747-52. [PMID: 16510144 DOI: 10.1016/j.febslet.2006.02.028] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2005] [Revised: 01/24/2006] [Accepted: 02/13/2006] [Indexed: 11/16/2022]
Abstract
We applied suppression subtractive hybridization and mirror orientation selection to compare gene expression profiles of isolated Nicotiana tabacum cv SR1 zygotes and egg cells. Our results revealed that many differentially expressed genes in zygotes were transcribed de novo after fertilization. Some of these genes are critical to zygote polarity and pattern formation during early embryogenesis. This suggests that the transcriptome is restructed in zygote and that the maternal-to-zygotic transition happens before the first zygotic division, which is much earlier in higher plants than in animals. The expressed sequence tags used in this study provide a valuable resource for future research on fertilization and early embryogenesis.
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Affiliation(s)
- Jue Ning
- Key Laboratory of Ministry of Education for Plant Developmental Biology, College of Life Science, Wuhan University, Wuhan 430072, China
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