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Wood AR, Aime MC. Phylogenetics of the rust fungi (Pucciniales) of South Africa, with notes on their life histories and possible origins. Mycologia 2024; 116:509-535. [PMID: 38742888 DOI: 10.1080/00275514.2024.2334189] [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: 01/19/2023] [Accepted: 03/20/2024] [Indexed: 05/16/2024]
Abstract
South Africa has an indigenous rust (Pucciniales) funga of approximately 460 species. This funga was sampled with species from as many genera as possible. The nuclear ribosomal large subunit (28S) region was amplified from samples representing 110 indigenous species, as well as the small subunit (18S) region and the cytochrome c oxidase subunit 3 (CO3) in some cases, and these were used in phylogenetic analyses. One new species is described, 12 new combinations made, six names reinstated, and two life history connections made. The life histories of this funga were summarized; it is dominated by species with contracted life histories. The majority of species are autoecious, with a small proportion being heteroecious. Of the autoecious species, many will likely be homothallic with no spermagonia. A shortened life history with homothallism allows for a single basidiospore infection to initiate a local population buildup under the prevailing unpredictable climatic conditions. Suggestions are made as to the possible origin of this funga based on the development of the modern South African flora. It is postulated that the rusts of South Africa are of relatively recent origin, consisting of three groups. Firstly, there is an African tropical element with members of the Mikronegerineae (Hemileia), the Sphaerophragmiaceae (Puccorchidium, Sphaerophragmium), and certain Uredinineae (Stomatisora). Their immediate ancestors likely occurred in the tropical forests of Africa during the Paleogene. Secondly, there is a pantropical element including the Raveneliaceae (e.g., Diorchidium, Maravalia, Ravenelia sensu lato, Uropyxis). This likely diversified during the Neogene, when the mimosoids became the dominant trees of the developing savannas. Thirdly, the Pucciniaceae invaded Africa as this continent pushed northward closing the Tethys Sea. They diversified with the development of the savannas as these become the dominant habitat in most of Africa, and are by far the largest component of the South African rust funga.
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Affiliation(s)
- Alan R Wood
- Plant Health and Protection, Agricultural Research Council, Stellenbosch 7599, South Africa
- Discipline of Plant Pathology, College of Agriculture and Environmental Sciences, University of KwaZulu-Natal, Pietermaritzburg 3209, South Africa
| | - M Catherine Aime
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47901, USA
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2
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Omollo WO, Rabarijaona RN, Ranaivoson RM, Rakotoarinivo M, Barrett RL, Zhang Q, Lai YJ, Ye JF, Le CT, Antonelli A, Chen ZD, Liu B, Lu LM. Spatial heterogeneity of neo- and paleo-endemism for plants in Madagascar. Curr Biol 2024; 34:1271-1283.e4. [PMID: 38460512 DOI: 10.1016/j.cub.2024.02.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/21/2024] [Accepted: 02/13/2024] [Indexed: 03/11/2024]
Abstract
Madagascar is a biogeographically unique island with a remarkably high level of endemism. However, endemic taxa in Madagascar are massively threatened due to unprecedented pressures from anthropogenic habitat modification and climate change. A comprehensive phylogeny-based biodiversity evaluation of the island remains lacking. Here, we identify hotspots of taxonomic and phylogenetic plant diversity and neo- and paleo-endemism by generating a novel dated tree of life for the island. The tree is based on unprecedented sampling of 3,950 species (33% of the total known species) and 1,621 genera (93% of the total known genera and 69% of endemic genera) of Malagasy vascular plants. We find that island-endemic genera are concentrated in multiple lineages combining high taxonomic and phylogenetic diversity. Integrating phylogenetic and geographic distribution data, our results reveal that taxon richness and endemism are concentrated in the northern, eastern, and southeastern humid forests. Paleo-endemism centers are concentrated in humid eastern and central regions, whereas neo-endemism centers are concentrated in the dry and spiny forests in western and southern Madagascar. Our statistical analysis of endemic genera in each vegetation region supports a higher proportion of ancient endemic genera in the east but a higher proportion of recent endemic genera in the south and west. Overlaying centers of phylogenetic endemism with protected areas, we identify conservation gaps concentrated in western and southern Madagascar. These gaps should be incorporated into conservation strategies to aid the protection of multiple facets of biodiversity and their benefits to the Malagasy people.
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Affiliation(s)
- Wyckliffe Omondi Omollo
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Romer Narindra Rabarijaona
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rindra Manasoa Ranaivoson
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Plant Biology and Ecology, Faculty of Sciences, University of Antananarivo, Antananarivo 101, Madagascar
| | - Mijoro Rakotoarinivo
- Department of Plant Biology and Ecology, Faculty of Sciences, University of Antananarivo, Antananarivo 101, Madagascar
| | - Russell L Barrett
- National Herbarium of New South Wales, Australian Botanic Garden, Locked Bag 6002, Mount Annan, NSW 2567, Australia; School of Biological, Earth, and Environmental Sciences, University of New South Wales, Kensington, NSW 2052, Australia
| | - Qiang Zhang
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China
| | - Yang-Jun Lai
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China
| | - Jian-Fei Ye
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China
| | - Chi Toan Le
- Hanoi Pedagogical University 2, 32 Nguyen Van Linh, Xuanhoa, Phucyen, Vinhphuc 15000, Vietnam
| | - Alexandre Antonelli
- Royal Botanic Gardens, Kew, TW9 3AE Richmond, Surrey, UK; Gothenburg Global Biodiversity Centre, Department of Biological and Environmental Sciences, University of Gothenburg, 41319 Gothenburg, Sweden; Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Department of Biology, University of Oxford, Oxford OX1 3RB, UK
| | - Zhi-Duan Chen
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
| | - Bing Liu
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China.
| | - Li-Min Lu
- State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China.
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Peris D, Condamine FL. The angiosperm radiation played a dual role in the diversification of insects and insect pollinators. Nat Commun 2024; 15:552. [PMID: 38253644 PMCID: PMC10803743 DOI: 10.1038/s41467-024-44784-4] [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: 02/23/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
Interactions with angiosperms have been hypothesised to play a crucial role in driving diversification among insects, with a particular emphasis on pollinator insects. However, support for coevolutionary diversification in insect-plant interactions is weak. Macroevolutionary studies of insect and plant diversities support the hypothesis that angiosperms diversified after a peak in insect diversity in the Early Cretaceous. Here, we used the family-level fossil record of insects as a whole, and insect pollinator families in particular, to estimate diversification rates and the role of angiosperms on insect macroevolutionary history using a Bayesian process-based approach. We found that angiosperms played a dual role that changed through time, mitigating insect extinction in the Cretaceous and promoting insect origination in the Cenozoic, which is also recovered for insect pollinator families only. Although insects pollinated gymnosperms before the angiosperm radiation, a radiation of new pollinator lineages began as angiosperm lineages increased, particularly significant after 50 Ma. We also found that global temperature, increases in insect diversity, and spore plants were strongly correlated with origination and extinction rates, suggesting that multiple drivers influenced insect diversification and arguing for the investigation of different explanatory variables in further studies.
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Affiliation(s)
- David Peris
- Institut Botànic de Barcelona (CSIC-CMCNB), 08038, Barcelona, Spain.
| | - Fabien L Condamine
- CNRS, Institut des Sciences de l'Evolution de Montpellier, Université de Montpellier, Place Eugène Bataillon, 34095, Montpellier, France
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4
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Ferrer MM, Vásquez-Cruz M, Hernández-Hernández T, Good SV. Geographical and life-history traits associated with low and high species richness across angiosperm families. FRONTIERS IN PLANT SCIENCE 2023; 14:1276727. [PMID: 38107007 PMCID: PMC10722503 DOI: 10.3389/fpls.2023.1276727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/26/2023] [Indexed: 12/19/2023]
Abstract
Introduction The phenomenal expansion of angiosperms has prompted many investigations into the factors driving their diversification, but there remain significant gaps in our understanding of flowering plant species diversity. Methods Using the crown age of families from five studies, we used a maximum likelihood approach to classify families as having poor, predicted or high species richness (SR) using strict consensus criteria. Using these categories, we looked for associations between family SR and i) the presence of an inferred familial ancestral polyploidization event, ii) 23 life history and floral traits compiled from previously published datasets and papers, and iii) sexual system (dioecy) or genetically determined self-incompatibility (SI) mating system using an updated version of our own database and iv) geographic distribution using a new database describing the global distribution of plant species/families across realms and biomes and inferred range. Results We find that more than a third of angiosperm families (65%) had predicted SR, a large proportion (30.2%) were species poor, while few (4.8%) had high SR. Families with poor SR were less likely to have undergone an ancestral polyploidization event, exhibited deficits in diverse traits, and were more likely to have unknown breeding systems and to be found in only one or few biomes and realms, especially the Afrotropics or Australasia. On the other hand, families with high SR were more likely to have animal mediated pollination or dispersal, are enriched for epiphytes and taxa with an annual life history, and were more likely to harbour sporophytic SI systems. Mapping the global distribution of georeferenced taxa by their family DR, we find evidence of regions dominated by taxa from lineages with high vs low SR. Discussion These results are discussed within the context of the literature describing "depauperons" and the factors contributing to low and high biodiversity in angiosperm clades.
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Affiliation(s)
- Miriam Monserrat Ferrer
- Departamento de Manejo y Conservación de Recursos Naturales Tropicales, Universidad Autónoma de Yucatán, Mérida Yucatán, Mexico
| | | | | | - Sara V. Good
- Department of Biology, The University of Winnipeg, Winnipeg, MB, Canada
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Flores-Téllez D, Tankmar MD, von Bülow S, Chen J, Lindorff-Larsen K, Brodersen P, Arribas-Hernández L. Insights into the conservation and diversification of the molecular functions of YTHDF proteins. PLoS Genet 2023; 19:e1010980. [PMID: 37816028 PMCID: PMC10617740 DOI: 10.1371/journal.pgen.1010980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 10/31/2023] [Accepted: 09/17/2023] [Indexed: 10/12/2023] Open
Abstract
YT521-B homology (YTH) domain proteins act as readers of N6-methyladenosine (m6A) in mRNA. Members of the YTHDF clade determine properties of m6A-containing mRNAs in the cytoplasm. Vertebrates encode three YTHDF proteins whose possible functional specialization is debated. In land plants, the YTHDF clade has expanded from one member in basal lineages to eleven so-called EVOLUTIONARILY CONSERVED C-TERMINAL REGION1-11 (ECT1-11) proteins in Arabidopsis thaliana, named after the conserved YTH domain placed behind a long N-terminal intrinsically disordered region (IDR). ECT2, ECT3 and ECT4 show genetic redundancy in stimulation of primed stem cell division, but the origin and implications of YTHDF expansion in higher plants are unknown, as it is unclear whether it involves acquisition of fundamentally different molecular properties, in particular of their divergent IDRs. Here, we use functional complementation of ect2/ect3/ect4 mutants to test whether different YTHDF proteins can perform the same function when similarly expressed in leaf primordia. We show that stimulation of primordial cell division relies on an ancestral molecular function of the m6A-YTHDF axis in land plants that is present in bryophytes and is conserved over YTHDF diversification, as it appears in all major clades of YTHDF proteins in flowering plants. Importantly, although our results indicate that the YTH domains of all arabidopsis ECT proteins have m6A-binding capacity, lineage-specific neo-functionalization of ECT1, ECT9 and ECT11 happened after late duplication events, and involves altered properties of both the YTH domains, and, especially, of the IDRs. We also identify two biophysical properties recurrent in IDRs of YTHDF proteins able to complement ect2 ect3 ect4 mutants, a clear phase separation propensity and a charge distribution that creates electric dipoles. Human and fly YTHDFs do not have IDRs with this combination of properties and cannot replace ECT2/3/4 function in arabidopsis, perhaps suggesting different molecular activities of YTHDF proteins between major taxa.
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Affiliation(s)
- Daniel Flores-Téllez
- University of Copenhagen, Biology Department. Copenhagen, Denmark
- Universidad Francisco de Vitoria, Facultad de Ciencias Experimentales. Pozuelo de Alarcón (Madrid), Spain
| | | | - Sören von Bülow
- University of Copenhagen, Biology Department. Copenhagen, Denmark
| | - Junyu Chen
- University of Copenhagen, Biology Department. Copenhagen, Denmark
| | | | - Peter Brodersen
- University of Copenhagen, Biology Department. Copenhagen, Denmark
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6
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Zhao H, Dai YC, Wu F, Liu XY, Maurice S, Krutovsky KV, Pavlov IN, Lindner DL, Martin FM, Yuan Y. Insights into the Ecological Diversification of the Hymenochaetales based on Comparative Genomics and Phylogenomics With an Emphasis on Coltricia. Genome Biol Evol 2023; 15:evad136. [PMID: 37498334 PMCID: PMC10410303 DOI: 10.1093/gbe/evad136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/01/2023] [Accepted: 07/16/2023] [Indexed: 07/28/2023] Open
Abstract
To elucidate the genomic traits of ecological diversification in the Hymenochaetales, we sequenced 15 new genomes, with attention to ectomycorrhizal (EcM) Coltricia species. Together with published data, 32 genomes, including 31 Hymenochaetales and one outgroup, were comparatively analyzed in total. Compared with those of parasitic and saprophytic members, EcM species have significantly reduced number of plant cell wall degrading enzyme genes, and expanded transposable elements, genome sizes, small secreted proteins, and secreted proteases. EcM species still retain some of secreted carbohydrate-active enzymes (CAZymes) and have lost the key secreted CAZymes to degrade lignin and cellulose, while possess a strong capacity to degrade a microbial cell wall containing chitin and peptidoglycan. There were no significant differences in secreted CAZymes between fungi growing on gymnosperms and angiosperms, suggesting that the secreted CAZymes in the Hymenochaetales evolved before differentiation of host trees into gymnosperms and angiosperms. Nevertheless, parasitic and saprophytic species of the Hymenochaetales are very similar in many genome features, which reflect their close phylogenetic relationships both being white rot fungi. Phylogenomic and molecular clock analyses showed that the EcM genus Coltricia formed a clade located at the base of the Hymenochaetaceae and divergence time later than saprophytic species. And Coltricia remains one to two genes of AA2 family. These indicate that the ancestors of Coltricia appear to have originated from saprophytic ancestor with the ability to cause a white rot. This study provides new genomic data for EcM species and insights into the ecological diversification within the Hymenochaetales based on comparative genomics and phylogenomics analyses.
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Affiliation(s)
- Heng Zhao
- Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China
| | - Yu-Cheng Dai
- Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China
| | - Fang Wu
- Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China
| | - Xiao-Yong Liu
- College of Life Sciences, Shandong Normal University, Jinan, China
| | - Sundy Maurice
- Section for Genetics and Evolutionary Biology (EVOGENE), Department of Biosciences, University of Oslo, Oslo, Norway
| | - Konstantin V Krutovsky
- Department of Forest Genetics and Forest Tree Breeding, Georg-August University of Göttingen, Göttingen, Germany
- Center for Integrated Breeding Research, George-August University of Göttingen, Göttingen, Germany
- Laboratory of Population Genetics, N. I. Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
- Laboratory of Forest Genomics, Department of Genomics and Bioinformatics, Genome Research and Education Center, Institute of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, Russia
- Scientific and Methodological Center, G. F. Morozov Voronezh State University of Forestry and Technologies, Voronezh, Russia
| | - Igor N Pavlov
- Mycology and Plant Pathology, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia
- Department of Chemical Technology of Wood and Biotechnology, Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia
| | | | - Francis M Martin
- Université de Lorraine, INRAE, UMR Interactions Arbres/Microorganismes, Centre INRAE-GrandEst-Nancy, Champenoux, France
| | - Yuan Yuan
- Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China
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7
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Ma L, Liu KW, Li Z, Hsiao YY, Qi Y, Fu T, Tang GD, Zhang D, Sun WH, Liu DK, Li Y, Chen GZ, Liu XD, Liao XY, Jiang YT, Yu X, Hao Y, Huang J, Zhao XW, Ke S, Chen YY, Wu WL, Hsu JL, Lin YF, Huang MD, Li CY, Huang L, Wang ZW, Zhao X, Zhong WY, Peng DH, Ahmad S, Lan S, Zhang JS, Tsai WC, Van de Peer Y, Liu ZJ. Diploid and tetraploid genomes of Acorus and the evolution of monocots. Nat Commun 2023; 14:3661. [PMID: 37339946 DOI: 10.1038/s41467-023-38829-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/17/2023] [Indexed: 06/22/2023] Open
Abstract
Monocots are a major taxon within flowering plants, have unique morphological traits, and show an extraordinary diversity in lifestyle. To improve our understanding of monocot origin and evolution, we generate chromosome-level reference genomes of the diploid Acorus gramineus and the tetraploid Ac. calamus, the only two accepted species from the family Acoraceae, which form a sister lineage to all other monocots. Comparing the genomes of Ac. gramineus and Ac. calamus, we suggest that Ac. gramineus is not a potential diploid progenitor of Ac. calamus, and Ac. calamus is an allotetraploid with two subgenomes A, and B, presenting asymmetric evolution and B subgenome dominance. Both the diploid genome of Ac. gramineus and the subgenomes A and B of Ac. calamus show clear evidence of whole-genome duplication (WGD), but Acoraceae does not seem to share an older WGD that is shared by most other monocots. We reconstruct an ancestral monocot karyotype and gene toolkit, and discuss scenarios that explain the complex history of the Acorus genome. Our analyses show that the ancestors of monocots exhibit mosaic genomic features, likely important for that appeared in early monocot evolution, providing fundamental insights into the origin, evolution, and diversification of monocots.
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Affiliation(s)
- Liang Ma
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ke-Wei Liu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy, State Key Laboratory of Chemical Oncogenomics, State Key Laboratory of Health Sciences and Technology, Institute of Biopharmaceutical and Health Engineering (iBHE), Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Zhen Li
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052, Ghent, Belgium
- VIB Center for Plant Systems Biology, VIB, 9052, Ghent, Belgium
| | - Yu-Yun Hsiao
- Orchid Research and Development Center, National Cheng Kung University, Tainan City, 701, Taiwan
| | - Yiying Qi
- Center for Genomics and Biotechnology, Haixia Institute of Science and Technology, Fujian Provincial Laboratory of Haixia Applied Plant Systems Biology, College of Life Sciences, Fujian Agriculture and Forestry University, 350002, Fuzhou, China
| | - Tao Fu
- BGI Genomics, BGI-Shenzhen, Shenzhen, 518083, China
| | - Guang-Da Tang
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, 512005, China
| | - Diyang Zhang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wei-Hong Sun
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ding-Kun Liu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yuanyuan Li
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Gui-Zhen Chen
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xue-Die Liu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xing-Yu Liao
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yu-Ting Jiang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xia Yu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yang Hao
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jie Huang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xue-Wei Zhao
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shijie Ke
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - You-Yi Chen
- Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan, 701, Taiwan
- Department of Life Sciences, National Cheng Kung University, Tainan, 701, Taiwan
| | - Wan-Lin Wu
- Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan, 701, Taiwan
| | - Jui-Ling Hsu
- Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan, 701, Taiwan
| | - Yu-Fu Lin
- Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan, 701, Taiwan
| | - Ming-Der Huang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Chia-Ying Li
- Department of Applied Chemistry, National Pingtung University, Pingtung City, Pingtung County, 900003, Taiwan
| | - Laiqiang Huang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy, State Key Laboratory of Chemical Oncogenomics, State Key Laboratory of Health Sciences and Technology, Institute of Biopharmaceutical and Health Engineering (iBHE), Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | | | | | | | - Dong-Hui Peng
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Sagheer Ahmad
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Siren Lan
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Ji-Sen Zhang
- Center for Genomics and Biotechnology, Haixia Institute of Science and Technology, Fujian Provincial Laboratory of Haixia Applied Plant Systems Biology, College of Life Sciences, Fujian Agriculture and Forestry University, 350002, Fuzhou, China.
- State Key Lab for Conservation and Utilization of Subtropical AgroBiological Resources and Guangxi Key Lab for Sugarcane Biology, Guangxi University, Nanning, 530004, China.
| | - Wen-Chieh Tsai
- Orchid Research and Development Center, National Cheng Kung University, Tainan City, 701, Taiwan.
- Institute of Tropical Plant Sciences and Microbiology, National Cheng Kung University, Tainan, 701, Taiwan.
| | - Yves Van de Peer
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052, Ghent, Belgium.
- VIB Center for Plant Systems Biology, VIB, 9052, Ghent, Belgium.
- Centre for Microbial Ecology and Genomics, Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa.
- College of Horticulture, Nanjing Agricultural University, Academy for Advanced Interdisciplinary Studies, Nanjing, 210095, China.
| | - Zhong-Jian Liu
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Center for Biotechnology and Biomedicine, Shenzhen Key Laboratory of Gene and Antibody Therapy, State Key Laboratory of Chemical Oncogenomics, State Key Laboratory of Health Sciences and Technology, Institute of Biopharmaceutical and Health Engineering (iBHE), Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
- Institute of Vegetable and Flowers, Shandong Academy of Agricultural Sciences, Jinan, 250100, China.
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou, 325005, China.
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8
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Carruthers T, Scotland RW. Deconstructing age estimates for angiosperms. Mol Phylogenet Evol 2023:107861. [PMID: 37329931 DOI: 10.1016/j.ympev.2023.107861] [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: 01/16/2023] [Revised: 06/08/2023] [Accepted: 06/13/2023] [Indexed: 06/19/2023]
Abstract
Estimates of the age of angiosperms from molecular phylogenies vary considerably. As in all estimates of evolutionary timescales from phylogenies, generating these estimates requires assumptions about the rate that molecular sequences are evolving (using clock models) and the time duration of the branches in a phylogeny (using fossil calibrations and branching processes). Often, it is difficult to demonstrate that these assumptions reflect current knowledge of molecular evolution or the fossil record. In this study we re-estimate the age of angiosperms using a minimal set of assumptions, therefore avoiding many of the assumptions inherent to other methods. The age estimates we generate are similar for each of the four datasets analysed, ranging from 130 to 400 Ma, but are far less precise than in previous studies. We demonstrate that this reduction in precision results from making less stringent assumptions about both rate and time, and that the analysed molecular dataset has very little effect on age estimates.
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Affiliation(s)
- Tom Carruthers
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Robert W Scotland
- Department of Biology, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
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9
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Kato M, Yamamori L, Imada Y, Sota T. Recent origin and diversification accompanied by repeated host shifts of thallus-mining flies (Diptera: Agromyzidae) on liverworts and hornworts. Proc Biol Sci 2023; 290:20222347. [PMID: 37282533 PMCID: PMC10244969 DOI: 10.1098/rspb.2022.2347] [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: 12/05/2022] [Accepted: 05/17/2023] [Indexed: 06/08/2023] Open
Abstract
Despite the vast diversity of phytophagous insects that feed on vascular plants (tracheophytes), insects that feed on bryophytes remain understudied. Agromyzidae, one of the most species-rich phytophagous clades in Diptera, consists mainly of leaf-mining species that feed on tracheophytes. However, a recent discovery of thallus-mining species on liverworts and hornworts within the Liriomyza group of Phytomyzinae provides an opportunity to study host shifts between tracheophytes and bryophytes. This study aimed to explore the origin and diversification of thallus-miners and estimate the pattern and timing of host shifts. Phylogenetic analysis of Phytomyzinae has revealed that the thallus-mining agromyzids formed a separate clade, which was sister to a fern pinnule-miner. The diversification of bryophyte-associated agromyzids since the Oligocene involved multiple host shifts across various bryophyte taxa. The diversification of the thallus-mining Phytoliriomyza may have occurred at the same time as the leaf-mining agromyzid flies on herbaceous plants, indicating a dynamic history of interactions between bryophytes and herbivores in angiosperms-dominated ecosystems.
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Affiliation(s)
- Makoto Kato
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo, Kyoto 606-8501, Japan
| | - Luna Yamamori
- Seto Marine Biological Laboratory, Field Science Education and Research Center, Kyoto University, 459 Shirahama-cho, Nishimuro, Wakayama 649-2211, Japan
| | - Yume Imada
- Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
- Department of Zoology, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo, Kyoto 606-8502, Japan
| | - Teiji Sota
- Department of Zoology, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo, Kyoto 606-8502, Japan
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10
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Palos K, Yu L, Railey CE, Nelson Dittrich AC, Nelson ADL. Linking discoveries, mechanisms, and technologies to develop a clearer perspective on plant long noncoding RNAs. THE PLANT CELL 2023; 35:1762-1786. [PMID: 36738093 PMCID: PMC10226578 DOI: 10.1093/plcell/koad027] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 12/19/2022] [Accepted: 12/22/2022] [Indexed: 05/30/2023]
Abstract
Long noncoding RNAs (lncRNAs) are a large and diverse class of genes in eukaryotic genomes that contribute to a variety of regulatory processes. Functionally characterized lncRNAs play critical roles in plants, ranging from regulating flowering to controlling lateral root formation. However, findings from the past decade have revealed that thousands of lncRNAs are present in plant transcriptomes, and characterization has lagged far behind identification. In this setting, distinguishing function from noise is challenging. However, the plant community has been at the forefront of discovery in lncRNA biology, providing many functional and mechanistic insights that have increased our understanding of this gene class. In this review, we examine the key discoveries and insights made in plant lncRNA biology over the past two and a half decades. We describe how discoveries made in the pregenomics era have informed efforts to identify and functionally characterize lncRNAs in the subsequent decades. We provide an overview of the functional archetypes into which characterized plant lncRNAs fit and speculate on new avenues of research that may uncover yet more archetypes. Finally, this review discusses the challenges facing the field and some exciting new molecular and computational approaches that may help inform lncRNA comparative and functional analyses.
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Affiliation(s)
- Kyle Palos
- Boyce Thompson Institute, Cornell University, Ithaca, NY 14853, USA
| | - Li’ang Yu
- Boyce Thompson Institute, Cornell University, Ithaca, NY 14853, USA
| | - Caylyn E Railey
- Boyce Thompson Institute, Cornell University, Ithaca, NY 14853, USA
- Plant Biology Graduate Field, Cornell University, Ithaca, NY 14853, USA
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11
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Albassatneh MC, Dubuisson JY, Escudero M, Fady B, Ponger L, Muller S. Effect of environmental and spatial factors on the phylogenetic and functional diversity of the Mediterranean tree communities of Europe. PLANT BIOLOGY (STUTTGART, GERMANY) 2023; 25:631-645. [PMID: 37016196 DOI: 10.1111/plb.13525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 03/10/2023] [Indexed: 05/09/2023]
Abstract
The tree flora of the Mediterranean Basin contains an outstanding taxonomic richness and a high proportion of endemic taxa. Contrary to other regions of the Mediterranean biome, a comprehensive phylogenetic analysis of the relationship between phylogenetic diversity, trait diversity and environmental factors in a spatial ecological context is lacking. We inferred the first calibrated phylogeny of 203 native tree species occurring in the European Mediterranean Basin based on 12 DNA regions. Using a set of four functional traits, we computed phylogenetic diversity for all 10,042 grid cells of 10 × 10 km spatial resolution to completely cover Mediterranean Europe. Then, we tested the spatial influence of environmental factors on tree diversity. Our results suggest that the nature of the relationship between traits and phylogeny varies among the different studied traits and according to the evolutionary distance considered. Phylogenetic diversity and functional diversity of European Mediterranean trees correlated strongly with species richness. High values of these diversity indices were located in the north of the study area, at high altitude, and minimum temperature of the coldest month. In contrast, the two phylogenetic indices that were not correlated with species richness (Mean Phylogenetic Distance, Phylogenetic Species Variability) were located in the south of the study area and were positively correlated with high altitude, soil organic carbon stock and sand soil texture. Our study provides support for the use of phylogenies in conservation biology to assess ecosystem functioning, and provides insights for the implementation of sustainable forest ecosystem management.
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Affiliation(s)
- M C Albassatneh
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle (MNHN), CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
- Institute of Ecology and Environmental Sciences iEES, Sorbonne University, Paris, France
| | - J-Y Dubuisson
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle (MNHN), CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
| | - M Escudero
- Department of Plant Biology and Ecology, University of Seville, Seville, Spain
| | - B Fady
- INRAE, Ecology of Mediterranean Forests, URFM, Avignon, France
| | - L Ponger
- Structure et Instabilité des Génomes, "Muséum National d'Histoire Naturelle" (MNHN), CNRS, Paris, France
| | - S Muller
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle (MNHN), CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
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12
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Bowles AMC, Williamson CJ, Williams TA, Lenton TM, Donoghue PCJ. The origin and early evolution of plants. TRENDS IN PLANT SCIENCE 2023; 28:312-329. [PMID: 36328872 DOI: 10.1016/j.tplants.2022.09.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 09/23/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Plant (archaeplastid) evolution has transformed the biosphere, but we are only now beginning to learn how this took place through comparative genomics, phylogenetics, and the fossil record. This has illuminated the phylogeny of Archaeplastida, Viridiplantae, and Streptophyta, and has resolved the evolution of key characters, genes, and genomes - revealing that many key innovations evolved long before the clades with which they have been casually associated. Molecular clock analyses estimate that Streptophyta and Viridiplantae emerged in the late Mesoproterozoic to late Neoproterozoic, whereas Archaeplastida emerged in the late-mid Palaeoproterozoic. Together, these insights inform on the coevolution of plants and the Earth system that transformed ecology and global biogeochemical cycles, increased weathering, and precipitated snowball Earth events, during which they would have been key to oxygen production and net primary productivity (NPP).
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Affiliation(s)
- Alexander M C Bowles
- School of Geographical Sciences, University of Bristol, University Road, Bristol BS8 1SS, UK; Bristol Palaeobiology Group, School of Biological Sciences and School of Earth Sciences, Life Sciences Building, University of Bristol, Bristol BS8 1TQ, UK.
| | | | - Tom A Williams
- Bristol Palaeobiology Group, School of Biological Sciences and School of Earth Sciences, Life Sciences Building, University of Bristol, Bristol BS8 1TQ, UK
| | - Timothy M Lenton
- Global Systems Institute, University of Exeter, Laver Building, North Park Road, Exeter EX4 4QE, UK
| | - Philip C J Donoghue
- Bristol Palaeobiology Group, School of Biological Sciences and School of Earth Sciences, Life Sciences Building, University of Bristol, Bristol BS8 1TQ, UK.
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13
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Scutt CP. Model Species to Investigate the Origin of Flowers. Methods Mol Biol 2023; 2686:83-109. [PMID: 37540355 DOI: 10.1007/978-1-0716-3299-4_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
The angiosperms, or flowering plants, arose at least 135 million years ago (Ma) and rapidly diversified to form over 300,000 species alive today. This group appears, however, to have separated from its closest living relatives, the extant gymnosperms, much earlier: over 300 Ma. Representatives of basally-diverging angiosperm lineages are of key importance to studies aimed at reconstructing the most recent common ancestor of living angiosperms, including its morphological, anatomical, eco-physiological and molecular aspects. Furthermore, evo-devo comparisons of angiosperms with living gymnosperms may help to determine how the many novel aspects of angiosperms, including those of the flower, first came about. This chapter reviews literature on the origin of angiosperms and focusses on basally-diverging angiosperms and gymnosperms that show advantages as potential experimental models, reviewing information and protocols for the use of these species in an evo-devo context. The final section suggests a means by which data from living and fossil groups could be integrated to better elucidate evolutionary events that took place on the long stem-lineage that apparently preceded the radiation of living angiosperms.
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Affiliation(s)
- Charles P Scutt
- Laboratoire Reproduction et Développement des Plantes, Université de Lyon, ENS de Lyon, UCB Lyon-1, CNRS, INRA, Lyon, France.
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14
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Meng YY, Xiang W, Wen Y, Huang DL, Cao KF, Zhu SD. Correlations between leaf economics, mechanical resistance and drought tolerance across 41 cycad species. ANNALS OF BOTANY 2022; 130:345-354. [PMID: 34871356 PMCID: PMC9486883 DOI: 10.1093/aob/mcab146] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/04/2021] [Indexed: 05/16/2023]
Abstract
BACKGROUND AND AIMS We conducted a comprehensive analysis of the functional traits of leaves (leaflets) of cycads. The aim of this study was to clarify the functional divergence between the earlier origin Cycadaceae and the later differentiated Zamiaceae, and the differences in trait associations between cycads and angiosperms. METHODS We selected 20 Cycadaceae species and 21 Zamiaceae species from the same cycad garden in South China, and measured their leaf structure, economic traits, mechanical resistance (Fp) and leaf water potential at the turgor loss point (πtlp). In addition, we compiled a dataset of geographical distribution along with climatic variables for these cycad species, and some leaf traits of tropical-sub-tropical angiosperm woody species from the literature for comparison. KEY RESULTS The results showed significantly contrasting leaf trait syndromes between the two families, with Zamiaceae species exhibiting thicker leaves, higher carbon investments and greater Fp than Cycadaceae species. Leaf thickness (LT) and πtlp were correlated with mean climatic variables in their native distribution ranges, indicating their evolutionary adaptation to environmental conditions. Compared with the leaves of angiosperms, the cycad leaves were thicker and tougher, and more tolerant to desiccation. Greater Fp was associated with a higher structural investment in both angiosperms and cycads; however, cycads showed lower Fp at a given leaf mass per area or LT than angiosperms. Enhancement of Fp led to more negative πtlp in angiosperms, but the opposite trend was observed in cycads. CONCLUSIONS Our results reveal that variations in leaf traits of cycads are mainly influenced by taxonomy and the environment of their native range. We also demonstrate similar leaf functional associations in terms of economics, but different relationships with regard to mechanics and drought tolerance between cycads and angiosperms. This study expands our understanding of the ecological strategies and likely responses of cycads to future climate change.
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Affiliation(s)
| | | | | | - Dong-Liu Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Key Laboratory of Forest Ecology and Conservation, Guangxi University, Nanning, China
| | - Kun-Fang Cao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Key Laboratory of Forest Ecology and Conservation, Guangxi University, Nanning, China
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15
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Carruthers T, Sun M, Baker WJ, Smith SA, de Vos JM, Eiserhardt WL. The Implications of Incongruence between Gene Tree and Species Tree Topologies for Divergence Time Estimation. Syst Biol 2022; 71:1124-1146. [PMID: 35167690 PMCID: PMC9366463 DOI: 10.1093/sysbio/syac012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 01/24/2022] [Accepted: 02/08/2022] [Indexed: 11/14/2022] Open
Abstract
Phylogenetic analyses are increasingly being performed with data sets that incorporate hundreds of loci. Due to incomplete lineage sorting, hybridization, and horizontal gene transfer, the gene trees for these loci may often have topologies that differ from each other and from the species tree. The effect of these topological incongruences on divergence time estimation has not been fully investigated. Using a series of simulation experiments and empirical analyses, we demonstrate that when topological incongruence between gene trees and the species tree is not accounted for, the temporal duration of branches in regions of the species tree that are affected by incongruence is underestimated, whilst the duration of other branches is considerably overestimated. This effect becomes more pronounced with higher levels of topological incongruence. We show that this pattern results from the erroneous estimation of the number of substitutions along branches in the species tree, although the effect is modulated by the assumptions inherent to divergence time estimation, such as those relating to the fossil record or among-branch-substitution-rate variation. By only analyzing loci with gene trees that are topologically congruent with the species tree, or only taking into account the branches from each gene tree that are topologically congruent with the species tree, we demonstrate that the effects of topological incongruence can be ameliorated. Nonetheless, even when topologically congruent gene trees or topologically congruent branches are selected, error in divergence time estimates remains. This stems from temporal incongruences between divergence times in species trees and divergence times in gene trees, and more importantly, the difficulty of incorporating necessary assumptions for divergence time estimation. [Divergence time estimation; gene trees; species tree; topological incongruence.].
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Affiliation(s)
- Tom Carruthers
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE, UK
| | - Miao Sun
- Department of Biology, Aarhus University, 8000 Aarhus C, Denmark
| | | | - Stephen A Smith
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Jurriaan M de Vos
- Department of Environmental Sciences – Botany, University of Basel, 4056 Basel, Switzerland
| | - Wolf L Eiserhardt
- Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE, UK
- Department of Biology, Aarhus University, 8000 Aarhus C, Denmark
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16
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Gurung K, Field KJ, Batterman SA, Goddéris Y, Donnadieu Y, Porada P, Taylor LL, Mills BJW. Climate windows of opportunity for plant expansion during the Phanerozoic. Nat Commun 2022; 13:4530. [PMID: 35927259 PMCID: PMC9352767 DOI: 10.1038/s41467-022-32077-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 07/15/2022] [Indexed: 11/08/2022] Open
Abstract
Earth's long-term climate may have profoundly influenced plant evolution. Local climatic factors, including water availability, light, and temperature, play a key role in plant physiology and growth, and have fluctuated substantially over geological time. However, the impact of these key climate variables on global plant biomass across the Phanerozoic has not yet been established. Linking climate and dynamic vegetation modelling, we identify two key 'windows of opportunity' during the Ordovician and Jurassic-Paleogene capable of supporting dramatic expansions of potential plant biomass. These conditions are driven by continental dispersion, paleolatitude of continental area and a lack of glaciation, allowing for an intense hydrological cycle and greater water availability. These windows coincide with the initial expansion of land plants and the later angiosperm radiation. Our findings suggest that the timing and expansion of habitable space for plants played an important role in plant evolution and diversification.
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Affiliation(s)
- Khushboo Gurung
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds, LS2 9JT, UK.
- School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
| | - Katie J Field
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Sheffield, S10 2TN, UK
| | - Sarah A Batterman
- Cary Institute of Ecosystem Studies, Millbrook, NY, 12545, USA
- School of Geography, University of Leeds, Leeds, LS2 9JT, UK
- Smithsonian Tropical Research Institute, Ancon, Panama
| | - Yves Goddéris
- Géosciences Environnement Toulouse, CNRS-Université de Toulouse III, Toulouse, France
| | - Yannick Donnadieu
- CEREGE, Aix Marseille Univ, CNRS, IRD, INRA, Coll France, Aix-en-Provence, France
| | - Philipp Porada
- Institute of Plant Science and Microbiology, University of Hamburg, Hamburg, Germany
| | - Lyla L Taylor
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Sheffield, S10 2TN, UK
| | - Benjamin J W Mills
- School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
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17
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Wang QH, Zhang J, Liu Y, Jia Y, Jiao YN, Xu B, Chen ZD. Diversity, phylogeny, and adaptation of bryophytes: insights from genomic and transcriptomic data. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:4306-4322. [PMID: 35437589 DOI: 10.1093/jxb/erac127] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Bryophytes including mosses, liverworts, and hornworts are among the earliest land plants, and occupy a crucial phylogenetic position to aid in the understanding of plant terrestrialization. Despite their small size and simple structure, bryophytes are the second largest group of extant land plants. They live ubiquitously in various habitats and are highly diversified, with adaptive strategies to modern ecosystems on Earth. More and more genomes and transcriptomes have been assembled to address fundamental questions in plant biology. Here, we review recent advances in bryophytes associated with diversity, phylogeny, and ecological adaptation. Phylogenomic studies have provided increasing supports for the monophyly of bryophytes, with hornworts sister to the Setaphyta clade including liverworts and mosses. Further comparative genomic analyses revealed that multiple whole-genome duplications might have contributed to the species richness and morphological diversity in mosses. We highlight that the biological changes through gene gain or neofunctionalization that primarily evolved in bryophytes have facilitated the adaptation to early land environments; among the strategies to adapt to modern ecosystems in bryophytes, desiccation tolerance is the most remarkable. More genomic information for bryophytes would shed light on key mechanisms for the ecological success of these 'dwarfs' in the plant kingdom.
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Affiliation(s)
- Qing-Hua Wang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Jian Zhang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Yang Liu
- Laboratory of Southern Subtropical Plant Diversity, Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen, 518004, China
| | - Yu Jia
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Yuan-Nian Jiao
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Bo Xu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Zhi-Duan Chen
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China
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18
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Sauquet H, Ramírez-Barahona S, Magallón S. What is the age of flowering plants? JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:3840-3853. [PMID: 35438718 DOI: 10.1093/jxb/erac130] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
The origin of flowering plants (angiosperms) was one of the most transformative events in the history of our planet. Despite considerable interest from multiple research fields, numerous questions remain, including the age of the group as a whole. Recent studies have reported a perplexing range of estimates for the crown-group age of angiosperms, from ~140 million years (Ma; Early Cretaceous) to 270 Ma (Permian). Both ends of the spectrum are now supported by both macroevolutionary analyses of the fossil record and fossil-calibrated molecular dating analyses. Here, we first clarify and distinguish among the three ages of angiosperms: the age of their divergence with acrogymnosperms (stem age); the age(s) of emergence of their unique, distinctive features including flowers (morphological age); and the age of the most recent common ancestor of all their living species (crown age). We then demonstrate, based on recent studies, that fossil-calibrated molecular dating estimates of the crown-group age of angiosperms have little to do with either the amount of molecular data or the number of internal fossil calibrations included. Instead, we argue that this age is almost entirely conditioned by its own prior distribution (typically a calibration density set by the user in Bayesian analyses). Lastly, we discuss which future discoveries or novel types of analyses are most likely to bring more definitive answers. In the meantime, we propose that the age of angiosperms is best described as largely unknown (140-270 Ma) and that contrasting age estimates in the literature mostly reflect conflicting prior distributions. We also suggest that future work that depends on the time scale of flowering plant diversification be designed to integrate over this vexing uncertainty.
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Affiliation(s)
- Hervé Sauquet
- National Herbarium of New South Wales (NSW), Royal Botanic Gardens and Domain Trust, Sydney, Australia
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia
| | | | - Susana Magallón
- Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México, México
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19
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Maria Costa-Paiva E, Mello B, Santos Bezerra B, Coates CJ, Halanych KM, Brown F, de Moraes Leme J, Trindade RIF. Molecular dating of the blood pigment hemocyanin provides new insight into the origin of animals. GEOBIOLOGY 2022; 20:333-345. [PMID: 34766436 DOI: 10.1111/gbi.12481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 10/14/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
The Neoproterozoic included changes in oceanic redox conditions, the configuration of continents and climate, extreme ice ages (Sturtian and Marinoan), and the rise of complex life forms. A much-debated topic in geobiology concerns the influence of atmospheric oxygenation on Earth and the origin and diversification of animal lineages, with the most widely popularized hypotheses relying on causal links between oxygen levels and the rise of animals. The vast majority of extant animals use aerobic metabolism for growth and homeostasis; hence, the binding and transportation of oxygen represent a vital physiological task. Considering the blood pigment hemocyanin (Hc) is present in sponges and ctenophores, and likely to be present in the common ancestor of animals, we investigated the evolution and date of Hc emergence using bioinformatics approaches on both transcriptomic and genomic data. Bayesian molecular dating suggested that the ancestral animal Hc gene arose approximately 881 Ma during the Tonian Period (1000-720 Ma), prior to the extreme glaciation events of the Cryogenian Period (720-635 Ma). This result is corroborated by a recently discovered fossil of a putative sponge ~890 Ma and modern molecular dating for the origin of metazoans of ~1,000-650 Ma (but does contradict previous inferences regarding the origin of Hc ~700-600 Ma). Our data reveal that crown-group animals already possessed hemocyanin-like blood pigments, which may have enhanced the oxygen-carrying capacity of these animals in hypoxic environments at that time or acted in the transport of hormones, detoxification of heavy metals, and immunity pathways.
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Affiliation(s)
- Elisa Maria Costa-Paiva
- Zoology Department, Institute of Biosciences, University of Sao Paulo, Sao Paulo, Brazil
- Geophysics and Atmospheric Sciences, Institute of Astronomy, University of Sao Paulo, Sao Paulo, Brazil
| | - Beatriz Mello
- Genetics Department, Biology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bruno Santos Bezerra
- Zoology Department, Institute of Biosciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Christopher J Coates
- Department of Biosciences, Faculty of Science and Engineering, Swansea University, Swansea, UK
| | - Kenneth M Halanych
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, USA
| | - Federico Brown
- Zoology Department, Institute of Biosciences, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Ricardo I F Trindade
- Geophysics and Atmospheric Sciences, Institute of Astronomy, University of Sao Paulo, Sao Paulo, Brazil
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20
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Plastid Genome of Equisetum xylochaetum from the Atacama Desert, Chile and the Relationships of Equisetum Based on Frequently Used Plastid Genes and Network Analysis. PLANTS 2022; 11:plants11071001. [PMID: 35406981 PMCID: PMC9002811 DOI: 10.3390/plants11071001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 04/02/2022] [Accepted: 04/04/2022] [Indexed: 11/22/2022]
Abstract
The modern pteridophyte genus Equisetum is the only survivor of Sphenopsida, an ancient clade known from the Devonian. This genus, of nearly worldwide distribution, comprises approximately 15 extant species. However, genomic information is limited. In this study, we assembled the complete chloroplast genome of the giant species Equisetum xylochaetum from a metagenomic sequence and compared the plastid genome structure and protein-coding regions with information available for two other Equisetum species using network analysis. Equisetum chloroplast genomes showed conserved traits of quadripartite structure, gene content, and gene order. Phylogenetic analysis based on plastome protein-coding regions corroborated previous reports that Equisetum is monophyletic, and that E. xylochaetum is more closely related to E. hyemale than to E. arvense. Single-gene phylogenetic estimation and haplotype analysis showed that E. xylochaetum belonged to the subgenus Hippochaete. Single-gene haplotype analysis revealed that E. arvense, E. hyemale, E. myriochaetum, and E. variegatum resolved more than one haplotype per species, suggesting the presence of a high diversity or a high mutation rate of the corresponding nucleotide sequence. Sequences from E. bogotense appeared as a distinct group of haplotypes representing the subgenus Paramochaete that diverged from Hippochaete and Equisetum. In addition, the taxa that were frequently located at the joint region of the map were E. scirpoides and E. pratense, suggesting the presence of some plastome characters among the Equiseum subgenera.
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Alves A, Confraria A, Lopes S, Costa B, Perdiguero P, Milhinhos A, Baena-González E, Correia S, Miguel CM. miR160 Interacts in vivo With Pinus pinaster AUXIN RESPONSE FACTOR 18 Target Site and Negatively Regulates Its Expression During Conifer Somatic Embryo Development. FRONTIERS IN PLANT SCIENCE 2022; 13:857611. [PMID: 35371172 PMCID: PMC8965291 DOI: 10.3389/fpls.2022.857611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
MicroRNAs (miRNAs) are key regulators of several plant developmental processes including embryogenesis. Most miRNA families are conserved across major groups of plant species, but their regulatory roles have been studied mainly in model species like Arabidopsis and other angiosperms. In gymnosperms, miRNA-dependent regulation has been less studied since functional approaches in these species are often difficult to establish. Given the fundamental roles of auxin signaling in somatic embryogenesis (SE) induction and embryo development, we investigated a previously predicted interaction between miR160 and a putative target encoding AUXIN RESPONSE FACTOR 18 in Pinus pinaster (PpARF18) embryonic tissues. Phylogenetic analysis of AUXIN RESPONSE FACTOR 18 (ARF18) from Pinus pinaster and Picea abies, used here as a model system of conifer embryogenesis, showed their close relatedness to AUXIN RESPONSE FACTOR (ARF) genes known to be targeted by miR160 in other species, including Arabidopsis ARF10 and ARF16. By using a luciferase (LUC) reporter system for miRNA activity in Arabidopsis protoplasts, we have confirmed that P. pinaster miR160 (ppi-miR160) interacts in vivo with PpARF18 target site. When the primary miR160 from P. pinaster was overexpressed in protoplasts under non-limiting levels of ARGONAUTE1, a significant increase of miR160 target cleavage activity was observed. In contrast, co-expression of the primary miRNA and the target mimic MIM160 led to a decrease of miR160 activity. Our results further support that this interaction is functional during consecutive stages of SE in the conifer model P. abies. Expression analyses conducted in five stages of development, from proembryogenic masses (PEMs) to the mature embryo, show that conifer ARF18 is negatively regulated by miR160 toward the fully developed mature embryo when miR160 reached its highest expression level. This study reports the first in vivo validation of a predicted target site of a conifer miRNA supporting the conservation of miR160 interaction with ARF targets in gymnosperms. The approach used here should be useful for future characterization of miRNA functions in conifer embryogenesis.
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Affiliation(s)
- Ana Alves
- Faculty of Sciences, BioISI—Biosystems and Integrative Sciences Institute, University of Lisbon, Lisbon, Portugal
| | - Ana Confraria
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras, Portugal
| | - Susana Lopes
- Faculty of Sciences, BioISI—Biosystems and Integrative Sciences Institute, University of Lisbon, Lisbon, Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras, Portugal
| | - Bruno Costa
- Faculty of Sciences, BioISI—Biosystems and Integrative Sciences Institute, University of Lisbon, Lisbon, Portugal
- INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Pedro Perdiguero
- Department of Genetics, Physiology and Microbiology, Faculty of Biological Sciences, Complutense University of Madrid (UCM), Madrid, Spain
| | - Ana Milhinhos
- Faculty of Sciences, BioISI—Biosystems and Integrative Sciences Institute, University of Lisbon, Lisbon, Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras, Portugal
| | - Elena Baena-González
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras, Portugal
| | - Sandra Correia
- Department of Life Sciences, Centre for Functional Ecology, University of Coimbra, Coimbra, Portugal
| | - Célia M. Miguel
- Faculty of Sciences, BioISI—Biosystems and Integrative Sciences Institute, University of Lisbon, Lisbon, Portugal
- Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
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22
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Benton MJ, Wilf P, Sauquet H. The Angiosperm Terrestrial Revolution and the origins of modern biodiversity. THE NEW PHYTOLOGIST 2022; 233:2017-2035. [PMID: 34699613 DOI: 10.1111/nph.17822] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Biodiversity today has the unusual property that 85% of plant and animal species live on land rather than in the sea, and half of these live in tropical rainforests. An explosive boost to terrestrial diversity occurred from c. 100-50 million years ago, the Late Cretaceous and early Palaeogene. During this interval, the Earth-life system on land was reset, and the biosphere expanded to a new level of productivity, enhancing the capacity and species diversity of terrestrial environments. This boost in terrestrial biodiversity coincided with innovations in flowering plant biology and evolutionary ecology, including their flowers and efficiencies in reproduction; coevolution with animals, especially pollinators and herbivores; photosynthetic capacities; adaptability; and ability to modify habitats. The rise of angiosperms triggered a macroecological revolution on land and drove modern biodiversity in a secular, prolonged shift to new, high levels, a series of processes we name here the Angiosperm Terrestrial Revolution.
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Affiliation(s)
- Michael J Benton
- School of Earth Sciences, Life Sciences Building, University of Bristol, Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - Peter Wilf
- Department of Geosciences and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, 16802, USA
| | - Hervé Sauquet
- National Herbarium of New South Wales, Royal Botanic Gardens and Domain Trust, Sydney, NSW, 2000, Australia
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
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23
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Xu Q, Niu SC, Li KL, Zheng PJ, Zhang XJ, Jia Y, Liu Y, Niu YX, Yu LH, Chen DF, Zhang GQ. Chromosome-Scale Assembly of the Dendrobium nobile Genome Provides Insights Into the Molecular Mechanism of the Biosynthesis of the Medicinal Active Ingredient of Dendrobium. Front Genet 2022; 13:844622. [PMID: 35299950 PMCID: PMC8921531 DOI: 10.3389/fgene.2022.844622] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/11/2022] [Indexed: 01/07/2023] Open
Abstract
Orchids constitute approximately 10% of flowering plant species. However, only about 10 orchid genomes have been published. Metabolites are the main way through which orchids respond to their environment. Dendrobium nobile, belonging to Dendrobium, the second largest genus in Orchidaceae, has high ornamental, medicinal, and ecological value. D. nobile is the source of many popular horticultural varieties. Among the Dendrobium species, D. nobile has the highest amount of dendrobine, which is regarded as one of the criteria for evaluating medicinal quality. Due to lack of data and analysis at the genomic level, the biosynthesis pathways of dendrobine and other related medicinal ingredients in D. nobile are unknown. In this paper, we report a chromosome-scale reference genome of D. nobile to facilitate the investigation of its genomic characteristics for comparison with other Dendrobium species. The assembled genome size of D. nobile was 1.19 Gb. Of the sequences, 99.45% were anchored to 19 chromosomes. Furthermore, we identified differences in gene number and gene expression patterns compared with two other Dendrobium species by integrating whole-genome sequencing and transcriptomic analysis [e.g., genes in the polysaccharide biosynthesis pathway and upstream of the alkaloid (dendrobine) biosynthesis pathway]. Differences in the TPS and CYP450 gene families were also found among orchid species. All the above differences might contribute to the species-specific medicinal ingredient biosynthesis pathways. The metabolic pathway-related analysis will provide further insight into orchid responses to the environment. Additionally, the reference genome will provide important insights for further molecular elucidation of the medicinal active ingredients of Dendrobium and enhance the understanding of orchid evolution.
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Affiliation(s)
- Qing Xu
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
- *Correspondence: Qing Xu, ; Duan-Fen Chen, ; Guo-Qiang Zhang,
| | - Shan-Ce Niu
- College of Horticulture, Hebei Agricultural University, Baoding, China
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding, China
| | - Kang-Li Li
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
| | - Pei-Ji Zheng
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
| | - Xiao-Jing Zhang
- College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Yin Jia
- College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Yang Liu
- College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Yun-Xia Niu
- School of Vocational Education, Tianjin University of Technology and Education, Tianjin, China
| | - Li-Hong Yu
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
| | - Duan-Fen Chen
- College of Horticulture, Hebei Agricultural University, Baoding, China
- *Correspondence: Qing Xu, ; Duan-Fen Chen, ; Guo-Qiang Zhang,
| | - Guo-Qiang Zhang
- GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
- Laboratory for Orchid Conservation and Utilization, The Orchid Conservation and Research Center of Shenzhen, The National Orchid Conservation Center of China, Shenzhen, China
- *Correspondence: Qing Xu, ; Duan-Fen Chen, ; Guo-Qiang Zhang,
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24
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Carruthers T, Scotland RW. exTREEmaTIME: a method for incorporating uncertainty into divergence time estimates. Biol Open 2022; 11:274355. [PMID: 35147180 PMCID: PMC8845097 DOI: 10.1242/bio.059181] [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: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 11/20/2022] Open
Abstract
We present a method of divergence time estimation (exTREEmaTIME) that aims to effectively account for uncertainty in divergence time estimates. The method requires a minimal set of assumptions, and, based on these assumptions, estimates the oldest possible divergence times and youngest possible divergence times that are consistent with the assumptions. We use a series of simulations and empirical analyses to illustrate that exTREEmaTIME is effective at representing uncertainty. We then describe how exTREEmaTIME can act as a basis to determine the implications of the more stringent assumptions that are incorporated into other methods of divergence time estimation that produce more precise estimates. This is critically important given that many of the assumptions that are incorporated into these methods are highly complex, difficult to justify biologically, and as such can lead to estimates that are highly inaccurate. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Tom Carruthers
- The Jodrell Building, Royal Botanic Gardens Kew, Richmond, London TW9 3AE, UK
| | - Robert W Scotland
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
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25
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Asaf S, Khan AL, Jan R, Khan A, Khan A, Kim KM, Lee IJ. The dynamic history of gymnosperm plastomes: Insights from structural characterization, comparative analysis, phylogenomics, and time divergence. THE PLANT GENOME 2021; 14:e20130. [PMID: 34505399 DOI: 10.1002/tpg2.20130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/08/2021] [Indexed: 05/25/2023]
Abstract
Gymnosperms are among the most endangered groups of plant species; they include ginkgo, pines (Conifers I), cupressophytes (Conifers II), cycads, and gnetophytes. The relationships among the five extant gymnosperm groups remain equivocal. We analyzed 167 available gymnosperm plastomes and investigated their diversity and phylogeny. We found that plastome size, structure, and gene order were highly variable in the five gymnosperm groups, of which Parasitaxus usta (Vieill.) de Laub. and Macrozamia mountperriensis F.M.Bailey had the smallest and largest plastomes, respectively. The inverted repeats (IRs) of the five groups were shown to have evolved through distinctive evolutionary scenarios. The IRs have been lost in all conifers but retained in cycads and gnetophytes. A positive association between simple sequence repeat (SSR) abundance and plastome size was observed, and the SSRs with the most variation were found in Pinaceae. Furthermore, the number of repeats was negatively correlated with IR length; thus, the highest number of repeats was detected in Conifers I and II, in which the IRs had been lost. We constructed a phylogeny based on 29 shared genes from 167 plastomes. With the plastome tree and 13 calibrations, we estimated the tree height between present-day angiosperms and gymnosperms to be ∼380 million years ago (mya). The placement of Gnetales in the tree agreed with the Gnetales-other gymnosperms hypothesis. The divergence between Ginkgo and cycads was estimated as ∼284 mya; the crown age of the cycads was 251 mya. Our time-calibrated plastid-based phylogenomic tree provides a framework for comparative studies of gymnosperm evolution.
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Affiliation(s)
- Sajjad Asaf
- Natural and Medical Sciences Research Center, Univ. of Nizwa, Nizwa, 616, Oman
| | - Abdul Latif Khan
- Dep. of Biotechnology, College of Technology, Univ. of Houston, Houston, TX, 77204, USA
| | - Rahmatullah Jan
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National Univ., Daegu, 41566, Republic of Korea
| | - Arif Khan
- Genomics Group, Faculty of Biosciences and Aquaculture, Nord Univ., Bodø, 8049, Norway
| | - Adil Khan
- Institute of Genomics for Crop Abiotic Stress Tolerance, Dep. of Plant and Soil Science, Texas Tech Univ., Lubbock, TX, 79409, USA
| | - Kyung-Min Kim
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National Univ., Daegu, 41566, Republic of Korea
| | - In-Jung Lee
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture & Life Science, Kyungpook National Univ., Daegu, 41566, Republic of Korea
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26
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Zhao YH, Zhou T, Wang JX, Li Y, Fang MF, Liu JN, Li ZH. Evolution and structural variations in chloroplast tRNAs in gymnosperms. BMC Genomics 2021; 22:750. [PMID: 34663228 PMCID: PMC8524817 DOI: 10.1186/s12864-021-08058-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 10/06/2021] [Indexed: 11/22/2022] Open
Abstract
Background Chloroplast transfer RNAs (tRNAs) can participate in various vital processes. Gymnosperms have important ecological and economic value, and they are the dominant species in forest ecosystems in the Northern Hemisphere. However, the evolution and structural changes in chloroplast tRNAs in gymnosperms remain largely unclear. Results In this study, we determined the nucleotide evolution, phylogenetic relationships, and structural variations in 1779 chloroplast tRNAs in gymnosperms. The numbers and types of tRNA genes present in the chloroplast genomes of different gymnosperms did not differ greatly, where the average number of tRNAs was 33 and the frequencies of occurrence for various types of tRNAs were generally consistent. Nearly half of the anticodons were absent. Molecular sequence variation analysis identified the conserved secondary structures of tRNAs. About a quarter of the tRNA genes were found to contain precoded 3′ CCA tails. A few tRNAs have undergone novel structural changes that are closely related to their minimum free energy, and these structural changes affect the stability of the tRNAs. Phylogenetic analysis showed that tRNAs have evolved from multiple common ancestors. The transition rate was higher than the transversion rate in gymnosperm chloroplast tRNAs. More loss events than duplication events have occurred in gymnosperm chloroplast tRNAs during their evolutionary process. Conclusions These findings provide novel insights into the molecular evolution and biological characteristics of chloroplast tRNAs in gymnosperms. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-08058-3.
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Affiliation(s)
- Yu-He Zhao
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Tong Zhou
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Jiu-Xia Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Yan Li
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Min-Feng Fang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Jian-Ni Liu
- State Key Laboratory of Continental Dynamics, Department of Geology, Early Life Institute, Northwest University, Xi'an, 710069, China
| | - Zhong-Hu Li
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), College of Life Sciences, Northwest University, Xi'an, 710069, China.
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27
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Abstract
There can be no doubt that early land plant evolution transformed the planet but, until recently, how and when this was achieved was unclear. Coincidence in the first appearance of land plant fossils and formative shifts in atmospheric oxygen and CO2 are an artefact of the paucity of earlier terrestrial rocks. Disentangling the timing of land plant bodyplan assembly and its impact on global biogeochemical cycles has been precluded by uncertainty concerning the relationships of bryophytes to one another and to the tracheophytes, as well as the timescale over which these events unfolded. New genome and transcriptome sequencing projects, combined with the application of sophisticated phylogenomic modelling methods, have yielded increasing support for the Setaphyta clade of liverworts and mosses, within monophyletic bryophytes. We consider the evolution of anatomy, genes, genomes and of development within this phylogenetic context, concluding that many vascular plant (tracheophytes) novelties were already present in a comparatively complex last common ancestor of living land plants (embryophytes). Molecular clock analyses indicate that embryophytes emerged in a mid-Cambrian to early Ordovician interval, compatible with hypotheses on their role as geoengineers, precipitating early Palaeozoic glaciations.
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Affiliation(s)
- Philip C J Donoghue
- School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK.
| | - C Jill Harrison
- School of Biological Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Jordi Paps
- School of Biological Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Harald Schneider
- School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK; Center of Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Yunnan, China
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28
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Du XY, Lu JM, Zhang LB, Wen J, Kuo LY, Mynssen CM, Schneider H, Li DZ. Simultaneous diversification of Polypodiales and angiosperms in the Mesozoic. Cladistics 2021; 37:518-539. [PMID: 34570931 DOI: 10.1111/cla.12457] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2021] [Indexed: 01/21/2023] Open
Abstract
Comprising about 82% of the extant fern species diversity, Polypodiales are generally believed to have diversified in the Late Cretaceous. We estimated the divergence times of Polypodiales using both penalized likelihood and Bayesian methods, based on a dataset consisting of 208 plastomes representing all 28 families and 14 fossil constraints reflecting current interpretations of fossil record. Our plastome phylogeny recovered the same six major lineages as a recent nuclear phylogeny, but the position of Dennstaedtiineae was different. The present phylogeny showed high resolution of relationships among the families of Polypodiales, especially among those forming the Aspleniineae. The divergence time estimates supported the most recent common ancestor of Polypodiales and its closest relative dating back to the Triassic, establishment of the major lineages in the Jurassic, and a likely accelerated radiation during the late Jurassic and the Early Cretaceous. The estimated divergence patterns of Polypodiales and angiosperms converge to a scenario in which their main lineages were established simultaneously shortly before the onset of the Cretaceous Terrestrial Revolution, and further suggest a pre-Cretaceous hidden history for both lineages. The pattern of simultaneous diversifications shown here elucidate an important gap in our understanding of the Terrestrial Revolution that shaped today's ecosystems.
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Affiliation(s)
- Xin-Yu Du
- Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China.,Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, 19 Qingsong Road, Kunming, Yunnan, 650201, China
| | - Jin-Mei Lu
- Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China.,Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China
| | - Li-Bing Zhang
- Missouri Botanical Garden, 4344 Shaw Blvd, St Louis, MO, 63110, USA
| | - Jun Wen
- Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013-7012, USA
| | - Li-Yaung Kuo
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC
| | - Claudine M Mynssen
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Pacheco Leão 915, Rio de Janeiro, RJ, 22460-030, Brazil
| | - Harald Schneider
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Yunnan, 666000, China
| | - De-Zhu Li
- Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China.,Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, Yunnan, 650201, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, 19 Qingsong Road, Kunming, Yunnan, 650201, China
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29
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Evolution of a key enzyme of aerobic metabolism reveals Proterozoic functional subunit duplication events and an ancient origin of animals. Sci Rep 2021; 11:15744. [PMID: 34344935 PMCID: PMC8333347 DOI: 10.1038/s41598-021-95094-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 07/16/2021] [Indexed: 02/07/2023] Open
Abstract
The biological toolkits for aerobic respiration were critical for the rise and diversification of early animals. Aerobic life forms generate ATP through the oxidation of organic molecules in a process known as Krebs' Cycle, where the enzyme isocitrate dehydrogenase (IDH) regulates the cycle's turnover rate. Evolutionary reconstructions and molecular dating of proteins related to oxidative metabolism, such as IDH, can therefore provide an estimate of when the diversification of major taxa occurred, and their coevolution with the oxidative state of oceans and atmosphere. To establish the evolutionary history and divergence time of NAD-dependent IDH, we examined transcriptomic data from 195 eukaryotes (mostly animals). We demonstrate that two duplication events occurred in the evolutionary history of NAD-IDH, one in the ancestor of eukaryotes approximately at 1967 Ma, and another at 1629 Ma, both in the Paleoproterozoic Era. Moreover, NAD-IDH regulatory subunits β and γ are exclusive to metazoans, arising in the Mesoproterozoic. Our results therefore support the concept of an ''earlier-than-Tonian'' diversification of eukaryotes and the pre-Cryogenian emergence of a metazoan IDH enzyme.
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30
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Mossion V, Dauphin B, Grant J, Kessler M, Zemp N, Croll D. Transcriptome-wide SNPs for Botrychium lunaria ferns enable fine-grained analysis of ploidy and population structure. Mol Ecol Resour 2021; 22:254-271. [PMID: 34310066 PMCID: PMC9291227 DOI: 10.1111/1755-0998.13478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 07/02/2021] [Accepted: 07/19/2021] [Indexed: 12/30/2022]
Abstract
Ferns are the second most diverse group of land plants after angiosperms. Extant species occupy a wide range of habitats and contribute significantly to ecosystem functioning. Despite the importance of ferns, most taxa are poorly covered by genomic resources and within‐species studies based on high‐resolution markers are entirely lacking. The genus Botrychium belongs to the family Ophioglossaceae, which includes species with very large genomes and chromosome numbers (e.g., Ophioglossum reticulatum 2n = 1520). The genus has a cosmopolitan distribution with 35 species, half of which are polyploids. Here, we establish a transcriptome for Botrychium lunaria (L.) Sw., a diploid species with an extremely large genome of about ~19.0–23.7 Gb. We assembled 25,677 high‐quality transcripts with an average length of 1,333 bp based on deep RNA‐sequencing of a single individual. We sequenced 11 additional transcriptomes of individuals from two populations in Switzerland, including the population of the reference individual. Based on read mapping to reference transcript sequences, we identified 374,463 single nucleotide polymorphisms (SNPs) segregating among individuals for an average density of 14 SNPs per kilobase. We found that all 12 transcriptomes were most likely from diploid individuals. The transcriptome‐wide markers provided unprecedented resolution of the population genetic structure, revealing substantial variation in heterozygosity among individuals. We also constructed a phylogenomic tree of 92 taxa representing all fern orders to ascertain the placement of the genus Botrychium. High‐quality transcriptomic resources and SNP sets constitute powerful population genomic resources to investigate the ecology, and evolution of fern populations.
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Affiliation(s)
- Vinciane Mossion
- Laboratory of Evolutionary Genetics, University of Neuchâtel, Neuchâtel, Switzerland
| | - Benjamin Dauphin
- Laboratory of Evolutionary Genetics, University of Neuchâtel, Neuchâtel, Switzerland.,Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
| | - Jason Grant
- Laboratory of Evolutionary Genetics, University of Neuchâtel, Neuchâtel, Switzerland
| | - Michael Kessler
- Department of Systematic and Evolutionary Botany, University of Zürich, Zurich, Switzerland
| | - Niklaus Zemp
- Genetic Diversity Centre (GDC), ETH Zurich, Zurich, Switzerland
| | - Daniel Croll
- Laboratory of Evolutionary Genetics, University of Neuchâtel, Neuchâtel, Switzerland
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Zhang W, Zhang G, Zeng P, Zhang Y, Hu H, Liu Z, Cai J. Genome sequence of Apostasia ramifera provides insights into the adaptive evolution in orchids. BMC Genomics 2021; 22:536. [PMID: 34256691 PMCID: PMC8278605 DOI: 10.1186/s12864-021-07852-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 06/23/2021] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The Orchidaceae family is one of the most diverse among flowering plants and serves as an important research model for plant evolution, especially "evo-devo" study on floral organs. Recently, sequencing of several orchid genomes has greatly improved our understanding of the genetic basis of orchid biology. To date, however, most sequenced genomes are from the Epidendroideae subfamily. To better elucidate orchid evolution, greater attention should be paid to other orchid lineages, especially basal lineages such as Apostasioideae. RESULTS Here, we present a genome sequence of Apostasia ramifera, a terrestrial orchid species from the Apostasioideae subfamily. The genomes of A. ramifera and other orchids were compared to explore the genetic basis underlying orchid species richness. Genome-based population dynamics revealed a continuous decrease in population size over the last 100 000 years in all studied orchids, although the epiphytic orchids generally showed larger effective population size than the terrestrial orchids over most of that period. We also found more genes of the terpene synthase gene family, resistant gene family, and LOX1/LOX5 homologs in the epiphytic orchids. CONCLUSIONS This study provides new insights into the adaptive evolution of orchids. The A. ramifera genome sequence reported here should be a helpful resource for future research on orchid biology.
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Affiliation(s)
- Weixiong Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau, China
| | - Guoqiang Zhang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, 518114, Shenzhen, China
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, 518114, Shenzhen, China
- National Orchid Conservation Center of China and Orchid Conservation and Research Center of Shenzhen, 518114, Shenzhen, China
| | - Peng Zeng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau, China
| | - Yongqiang Zhang
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, 518114, Shenzhen, China
- Shenzhen Key Laboratory for Orchid Conservation and Utilization, 518114, Shenzhen, China
- National Orchid Conservation Center of China and Orchid Conservation and Research Center of Shenzhen, 518114, Shenzhen, China
- Key Laboratory of NFGA for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, 350002, Fuzhou, China
| | - Hao Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau, China
| | - Zhongjian Liu
- Key Laboratory of NFGA for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, 350002, Fuzhou, China
| | - Jing Cai
- School of Ecology and Environment, Northwestern Polytechnical University, 710129, Xi'an, China.
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Barba-Montoya J, Tao Q, Kumar S. Molecular and morphological clocks for estimating evolutionary divergence times. BMC Ecol Evol 2021; 21:83. [PMID: 33980146 PMCID: PMC8117668 DOI: 10.1186/s12862-021-01798-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 04/20/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Matrices of morphological characters are frequently used for dating species divergence times in systematics. In some studies, morphological and molecular character data from living taxa are combined, whereas others use morphological characters from extinct taxa as well. We investigated whether morphological data produce time estimates that are concordant with molecular data. If true, it will justify the use of morphological characters alongside molecular data in divergence time inference. RESULTS We systematically analyzed three empirical datasets from different species groups to test the concordance of species divergence dates inferred using molecular and discrete morphological data from extant taxa as test cases. We found a high correlation between their divergence time estimates, despite a poor linear relationship between branch lengths for morphological and molecular data mapped onto the same phylogeny. This was because node-to-tip distances showed a much higher correlation than branch lengths due to an averaging effect over multiple branches. We found that nodes with a large number of taxa often benefit from such averaging. However, considerable discordance between time estimates from molecules and morphology may still occur as some intermediate nodes may show large time differences between these two types of data. CONCLUSIONS Our findings suggest that node- and tip-calibration approaches may be better suited for nodes with many taxa. Nevertheless, we highlight the importance of evaluating the concordance of intrinsic time structure in morphological and molecular data before any dating analysis using combined datasets.
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Affiliation(s)
- Jose Barba-Montoya
- Institute for Genomics and Evolutionary Medicine, Temple University, Philadelphia, PA, 19122, USA
- Department of Biology, Temple University, Philadelphia, PA, 19122, USA
| | - Qiqing Tao
- Institute for Genomics and Evolutionary Medicine, Temple University, Philadelphia, PA, 19122, USA
- Department of Biology, Temple University, Philadelphia, PA, 19122, USA
| | - Sudhir Kumar
- Institute for Genomics and Evolutionary Medicine, Temple University, Philadelphia, PA, 19122, USA.
- Department of Biology, Temple University, Philadelphia, PA, 19122, USA.
- Center for Excellence in Genome Medicine and Research, King Abdulaziz University, Jeddah, Saudi Arabia.
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33
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Su D, Yang L, Shi X, Ma X, Zhou X, Hedges SB, Zhong B. Large-Scale Phylogenomic Analyses Reveal the Monophyly of Bryophytes and Neoproterozoic Origin of Land Plants. Mol Biol Evol 2021; 38:3332-3344. [PMID: 33871608 PMCID: PMC8321542 DOI: 10.1093/molbev/msab106] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The relationships among the four major embryophyte lineages (mosses, liverworts, hornworts, vascular plants) and the timing of the origin of land plants are enigmatic problems in plant evolution. Here, we resolve the monophyly of bryophytes by improving taxon sampling of hornworts and eliminating the effect of synonymous substitutions. We then estimate the divergence time of crown embryophytes based on three fossil calibration strategies, and reveal that maximum calibration constraints have a major effect on estimating the time of origin of land plants. Moreover, comparison of priors and posteriors provides a guide for evaluating the optimal calibration strategy. By considering the reliability of fossil calibrations and the influences of molecular data, we estimate that land plants originated in the Precambrian (980–682 Ma), much older than widely recognized. Our study highlights the important contribution of molecular data when faced with contentious fossil evidence, and that fossil calibrations used in estimating the timescale of plant evolution require critical scrutiny.
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Affiliation(s)
- Danyan Su
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Lingxiao Yang
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xuan Shi
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xiaoya Ma
- College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xiaofan Zhou
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
| | - S Blair Hedges
- Center for Biodiversity, Temple University, Philadelphia, PA, USA
| | - Bojian Zhong
- College of Life Sciences, Nanjing Normal University, Nanjing, China
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Carruthers T, Scotland RW. The implications of interrelated assumptions on estimates of divergence times and rates of diversification. Syst Biol 2021; 70:1181-1199. [PMID: 33760070 DOI: 10.1093/sysbio/syab021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 03/16/2021] [Accepted: 03/22/2021] [Indexed: 11/15/2022] Open
Abstract
Phylogenies are increasingly being used as a basis to provide insight into macroevolutionary history. Here, we use simulation experiments and empirical analyses to evaluate methods that use phylogenies as a basis to make estimates of divergence times and rates of diversification. This is the first study to present a comprehensive assessment of the key variables that underpin analyses in this field - including substitution rates, speciation rates, and extinction, plus character sampling and taxon sampling. We show that in unrealistically simplistic cases (where substitution rates and speciation rates are constant, and where there is no extinction), increased character and taxon sampling lead to more accurate and precise parameter estimates. By contrast, in more complex but realistic cases (where substitution rates, speciation rates, and extinction rates vary), gains in accuracy and precision from increased character and taxon sampling are far more limited. The lack of accuracy and precision even occurs when using methods that are designed to account for more complex cases, such as relaxed clocks, fossil calibrations, and models that allow speciation rates and extinction rates to vary. The problem also persists when analysing genomic scale datasets. These results suggest two interrelated problems that occur when the processes that generated the data are more complex. First, methodological assumptions are more likely to be violated. Second, limitations in the information content of the data become more important.
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Affiliation(s)
- Tom Carruthers
- Royal Botanic Gardens Kew, Richmond, London, TW9 3AE, United Kingdom
| | - Robert W Scotland
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, United Kingdom
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Spasojevic T, Broad GR, Sääksjärvi IE, Schwarz M, Ito M, Korenko S, Klopfstein S. Mind the Outgroup and Bare Branches in Total-Evidence Dating: a Case Study of Pimpliform Darwin Wasps (Hymenoptera, Ichneumonidae). Syst Biol 2021; 70:322-339. [PMID: 33057674 PMCID: PMC7875445 DOI: 10.1093/sysbio/syaa079] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 10/02/2020] [Accepted: 10/02/2020] [Indexed: 01/16/2023] Open
Abstract
Taxon sampling is a central aspect of phylogenetic study design, but it has received limited attention in the context of total-evidence dating, a widely used dating approach that directly integrates molecular and morphological information from extant and fossil taxa. We here assess the impact of commonly employed outgroup sampling schemes and missing morphological data in extant taxa on age estimates in a total-evidence dating analysis under the uniform tree prior. Our study group is Pimpliformes, a highly diverse, rapidly radiating group of parasitoid wasps of the family Ichneumonidae. We analyze a data set comprising 201 extant and 79 fossil taxa, including the oldest fossils of the family from the Early Cretaceous and the first unequivocal representatives of extant subfamilies from the mid-Paleogene. Based on newly compiled molecular data from ten nuclear genes and a morphological matrix that includes 222 characters, we show that age estimates become both older and less precise with the inclusion of more distant and more poorly sampled outgroups. These outgroups not only lack morphological and temporal information but also sit on long terminal branches and considerably increase the evolutionary rate heterogeneity. In addition, we discover an artifact that might be detrimental for total-evidence dating: "bare-branch attraction," namely high attachment probabilities of certain fossils to terminal branches for which morphological data are missing. Using computer simulations, we confirm the generality of this phenomenon and show that a large phylogenetic distance to any of the extant taxa, rather than just older age, increases the risk of a fossil being misplaced due to bare-branch attraction. After restricting outgroup sampling and adding morphological data for the previously attracting, bare branches, we recover a Jurassic origin for Pimpliformes and Ichneumonidae. This first age estimate for the group not only suggests an older origin than previously thought but also that diversification of the crown group happened well before the Cretaceous-Paleogene boundary. Our case study demonstrates that in order to obtain robust age estimates, total-evidence dating studies need to be based on a thorough and balanced sampling of both extant and fossil taxa, with the aim of minimizing evolutionary rate heterogeneity and missing morphological information. [Bare-branch attraction; ichneumonids; fossils; morphological matrix; phylogeny; RoguePlots.].
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Affiliation(s)
- Tamara Spasojevic
- Abteilung Wirbellose Tiere Invertebrates, Naturhistorisches Museum der Burgergemeinde Bern, Bernastrasse 15, 3005 Bern, Switzerland
- Institute of Ecology and Evolution, Department of Biology, University of Bern, 3012 Bern, Switzerland
- Department of Entomology, National Museum of Natural History, Washington, DC 20560, USA
| | - Gavin R Broad
- Department of Life Sciences, Natural History Museum, London SW7 5BD, UK
| | | | | | - Masato Ito
- Graduate School of Agricultural Science, Department of Agrobioscience, Kobe University, 657-8501 Japan
| | - Stanislav Korenko
- Department of Agroecology and Crop Production, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 165 21 Prague 6, Suchdol, Czech Republic
| | - Seraina Klopfstein
- Abteilung Wirbellose Tiere Invertebrates, Naturhistorisches Museum der Burgergemeinde Bern, Bernastrasse 15, 3005 Bern, Switzerland
- Institute of Ecology and Evolution, Department of Biology, University of Bern, 3012 Bern, Switzerland
- Abteilung für Biowissenschaften, Naturhistorisches Museum Basel, 4051 Basel, Switzerland
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36
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Carruthers T, Sanderson MJ, Scotland RW. The Implications of Lineage-Specific Rates for Divergence Time Estimation. Syst Biol 2021; 69:660-670. [PMID: 31808929 PMCID: PMC7302051 DOI: 10.1093/sysbio/syz080] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 11/28/2019] [Accepted: 12/01/2019] [Indexed: 11/29/2022] Open
Abstract
Rate variation adds considerable complexity to divergence time estimation in molecular phylogenies. Here, we evaluate the impact of lineage-specific rates—which we define as among-branch-rate-variation that acts consistently across the entire genome. We compare its impact to residual rates—defined as among-branch-rate-variation that shows a different pattern of rate variation at each sampled locus, and gene-specific rates—defined as variation in the average rate across all branches at each sampled locus. We show that lineage-specific rates lead to erroneous divergence time estimates, regardless of how many loci are sampled. Further, we show that stronger lineage-specific rates lead to increasing error. This contrasts to residual rates and gene-specific rates, where sampling more loci significantly reduces error. If divergence times are inferred in a Bayesian framework, we highlight that error caused by lineage-specific rates significantly reduces the probability that the 95% highest posterior density includes the correct value, and leads to sensitivity to the prior. Use of a more complex rate prior—which has recently been proposed to model rate variation more accurately—does not affect these conclusions. Finally, we show that the scale of lineage-specific rates used in our simulation experiments is comparable to that of an empirical data set for the angiosperm genus Ipomoea. Taken together, our findings demonstrate that lineage-specific rates cause error in divergence time estimates, and that this error is not overcome by analyzing genomic scale multilocus data sets. [Divergence time estimation; error; rate variation.]
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Affiliation(s)
- Tom Carruthers
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
| | - Michael J Sanderson
- Department of Ecology and Evolutionary Biology, University of Arizona, 1041 East Lowell, Tucson, AZ 85721-0088, USA
| | - Robert W Scotland
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
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37
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The origin, evolution and diversification of multiple isoforms of light-dependent protochlorophyllide oxidoreductase (LPOR): focus on angiosperms. Biochem J 2020; 477:2221-2236. [PMID: 32568402 DOI: 10.1042/bcj20200323] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/29/2020] [Accepted: 06/01/2020] [Indexed: 12/11/2022]
Abstract
Light-dependent protochlorophyllide oxidoreductase (LPOR) catalyzes the reduction of protochlorophyllide to chlorophyllide, which is a key reaction for angiosperm development. Dark operative light-independent protochlorophyllide oxidoreductase (DPOR) is the other enzyme able to catalyze this reaction, however, it is not present in angiosperms. LPOR, which evolved later than DPOR, requires light to trigger the reaction. The ancestors of angiosperms lost DPOR genes and duplicated the LPORs, however, the LPOR evolution in angiosperms has not been yet investigated. In the present study, we built a phylogenetic tree using 557 nucleotide sequences of LPORs from both bacteria and plants to uncover the evolution of LPOR. The tree revealed that all modern sequences of LPOR diverged from a single sequence ∼1.36 billion years ago. The LPOR gene was then duplicated at least 10 times in angiosperms, leading to the formation of two or even more LPOR isoforms in multiple species. In the case of Arabidopsis thaliana, AtPORA and AtPORB originated in one duplication event, in contrary to the isoform AtPORC, which diverged first. We performed biochemical characterization of these isoforms in vitro, revealing differences in the lipid-driven properties. The results prone us to hypothesize that duplication events of LPOR gave rise to the isoforms having different lipid-driven activity, which may predispose them for functioning in different locations in plastids. Moreover, we showed that LPOR from Synechocystis operated in the lipid-independent manner, revealing differences between bacterial and plant LPORs. Based on the presented results, we propose a novel classification of LPOR enzymes based on their biochemical properties and phylogenetic relationships.
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38
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Givnish TJ, Kriebel R, Zaborsky JG, Rose JP, Spalink D, Waller DM, Cameron KM, Sytsma KJ. Adaptive associations among life history, reproductive traits, environment, and origin in the Wisconsin angiosperm flora. AMERICAN JOURNAL OF BOTANY 2020; 107:1677-1692. [PMID: 33315246 DOI: 10.1002/ajb2.1578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/31/2020] [Indexed: 06/12/2023]
Abstract
PREMISE We tested 25 classic and novel hypotheses regarding trait-origin, trait-trait, and trait-environment relationships to account for flora-wide variation in life history, habit, and especially reproductive traits using a plastid DNA phylogeny of most native (96.6%, or 1494/1547 species) and introduced (87.5%, or 690/789 species) angiosperms in Wisconsin, USA. METHODS We assembled data on life history, habit, flowering, dispersal, mating system, and occurrence across open/closed/mixed habitats across species in the state phylogeny. We used phylogenetically structured analyses to assess the strength and statistical significance of associations predicted by our models. RESULTS Introduced species are more likely to be annual herbs, occupy open habitats, have large, visually conspicuous, hermaphroditic flowers, and bear passively dispersed seeds. Among native species, hermaphroditism is associated with larger, more conspicuous flowers; monoecy is associated with small, inconspicuous flowers and passive seed dispersal; and dioecy is associated with small, inconspicuous flowers and fleshy fruits. Larger flowers with more conspicuous colors are more common in open habitats, and in understory species flowering under open (spring) canopies; fleshy fruits are more common in closed habitats. Wind pollination may help favor dioecy in open habitats. CONCLUSIONS These findings support predictions regarding how breeding systems depend on flower size, flower color, and fruit type, and how those traits depend on habitat. This study is the first to combine flora-wide phylogenies with complete trait databases and phylogenetically structured analyses to provide powerful tests of evolutionary hypotheses about reproductive traits and their variation with geographic source, each other, and environmental conditions.
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Affiliation(s)
- Thomas J Givnish
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Ricardo Kriebel
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - John G Zaborsky
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Jeffrey P Rose
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Daniel Spalink
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
- Department of Ecosystem Science and Management, Texas A&M University, College Station, Texas, 77843, USA
| | - Donald M Waller
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Kenneth M Cameron
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
| | - Kenneth J Sytsma
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin, 53705, USA
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39
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Xue JS, Zhang B, Zhan H, Lv YL, Jia XL, Wang T, Yang NY, Lou YX, Zhang ZB, Hu WJ, Gui J, Cao J, Xu P, Zhou Y, Hu JF, Li L, Yang ZN. Phenylpropanoid Derivatives Are Essential Components of Sporopollenin in Vascular Plants. MOLECULAR PLANT 2020; 13:1644-1653. [PMID: 32810599 DOI: 10.1016/j.molp.2020.08.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/03/2020] [Accepted: 08/13/2020] [Indexed: 05/22/2023]
Abstract
The outer wall of pollen and spores, namely the exine, is composed of sporopollenin, which is highly resistant to chemical reagents and enzymes. In this study, we demonstrated that phenylpropanoid pathway derivatives are essential components of sporopollenin in seed plants. Spectral analyses showed that the autofluorescence of Lilium and Arabidopsis sporopollenin is similar to that of lignin. Thioacidolysis and NMR analyses of pollen from Lilium and Cryptomeria further revealed that the sporopollenin of seed plants contains phenylpropanoid derivatives, including p-hydroxybenzoate (p-BA), p-coumarate (p-CA), ferulate (FA), and lignin guaiacyl (G) units. The phenylpropanoid pathway is expressed in the tapetum in Arabidopsis, consistent with the fact that the sporopollenin precursor originates from the tapetum. Further germination and comet assays showed that this pathway plays an important role in protection of pollen against UV radiation. In the pteridophyte plant species Ophioglossum vulgatum and Lycopodium clavata, phenylpropanoid derivatives including p-BA and p-CA were also detected, but G units were not. Taken together, our results indicate that phenylpropanoid derivatives are essential for sporopollenin synthesis in vascular plants. In addition, sporopollenin autofluorescence spectra of bryophytes, such as Physcomitrella and Haplocladium, exhibit distinct characteristics compared with those of vascular plants, indicating the diversity of sporopollenin among land plants.
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Affiliation(s)
- Jing-Shi Xue
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Baocai Zhang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - HuaDong Zhan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Yong-Lin Lv
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Xin-Lei Jia
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - TianHua Wang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Nai-Ying Yang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Yu-Xia Lou
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Zai-Bao Zhang
- College of Life Science, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Wen-Jing Hu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Jinshan Gui
- National Key Laboratory of Plant Molecular Genetics & CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Beijing 200032, China
| | - Jianguo Cao
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Ping Xu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Yihua Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jin-Feng Hu
- Department of Natural Products Chemistry, School of Pharmacy, Fudan University, No. 826 Zhangheng Road, Shanghai, 201203, China
| | - Laigeng Li
- National Key Laboratory of Plant Molecular Genetics & CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Beijing 200032, China.
| | - Zhong-Nan Yang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China.
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40
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Sousa F, Civáň P, Foster PG, Cox CJ. The Chloroplast Land Plant Phylogeny: Analyses Employing Better-Fitting Tree- and Site-Heterogeneous Composition Models. FRONTIERS IN PLANT SCIENCE 2020; 11:1062. [PMID: 32760416 PMCID: PMC7373204 DOI: 10.3389/fpls.2020.01062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/26/2020] [Indexed: 05/02/2023]
Abstract
The colonization of land by descendants of charophyte green algae marked a turning point in Earth history that enabled the development of the diverse terrestrial ecosystems we see today. Early land plants diversified into three gametophyte-dominant lineages, namely the hornworts, liverworts, and mosses, collectively known as bryophytes, and a sporophyte-dominant lineage, the vascular plants, or tracheophytes. In recent decades, the prevailing view of evolutionary relationships among these four lineages has been that the tracheophytes were derived from a bryophyte ancestor. However, recent phylogenetic evidence has suggested that bryophytes are monophyletic, and thus that the first split among land plants gave rise to the lineages that today we recognize as the bryophytes and tracheophytes. We present a phylogenetic analysis of chloroplast protein-coding data that also supports the monophyly of bryophytes. This newly compiled data set consists of 83 chloroplast genes sampled across 30 taxa that include chlorophytes and charophytes, including four members of the Zygnematophyceae, and land plants, that were sampled following a balanced representation of the main bryophyte and tracheophyte lineages. Analyses of non-synonymous site nucleotide data and amino acid translation data result in congruent phylogenetic trees showing the monophyly of bryophytes, with the Zygnematophyceae as the charophyte group most closely related to land plants. Analyses showing that bryophytes and tracheophytes evolved separately from a common terrestrial ancestor have profound implications for the way we understand the evolution of plant life cycles on land and how we interpret the early land plant fossil record.
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Affiliation(s)
- Filipe Sousa
- Centro de Ciências do Mar, Universidade do Algarve, Faro, Portugal
| | - Peter Civáň
- Centro de Ciências do Mar, Universidade do Algarve, Faro, Portugal
- INRA, Université Clermont-Auvergne, Clermont-Ferrand, France
| | - Peter G. Foster
- Department of Life Sciences, Natural History Museum, London, United Kingdom
| | - Cymon J. Cox
- Centro de Ciências do Mar, Universidade do Algarve, Faro, Portugal
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Kögler A, Seibt KM, Heitkam T, Morgenstern K, Reiche B, Brückner M, Wolf H, Krabel D, Schmidt T. Divergence of 3' ends as a driver of short interspersed nuclear element (SINE) evolution in the Salicaceae. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 103:443-458. [PMID: 32056333 DOI: 10.1111/tpj.14721] [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: 07/18/2019] [Revised: 01/13/2020] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
Short interspersed nuclear elements (SINEs) are small, non-autonomous and heterogeneous retrotransposons that are widespread in plants. To explore the amplification dynamics and evolutionary history of SINE populations in representative deciduous tree species, we analyzed the genomes of the six following Salicaceae species: Populus deltoides, Populus euphratica, Populus tremula, Populus tremuloides, Populus trichocarpa, and Salix purpurea. We identified 11 Salicaceae SINE families (SaliS-I to SaliS-XI), comprising 27 077 full-length copies. Most of these families harbor segmental similarities, providing evidence for SINE emergence by reshuffling or heterodimerization. We observed two SINE groups, differing in phylogenetic distribution pattern, similarity and 3' end structure. These groups probably emerged during the 'salicoid duplication' (~65 million years ago) in the Salix-Populus progenitor and during the separation of the genus Salix (45-65 million years ago), respectively. In contrast to conserved 5' start motifs across species and SINE families, the 3' ends are highly variable in sequence and length. This extraordinary 3'-end variability results from mutations in the poly(A) tail, which were fixed by subsequent amplificational bursts. We show that the dissemination of newly evolved 3' ends is accomplished by a displacement of older motifs, leading to various 3'-end subpopulations within the SaliS families.
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Affiliation(s)
- Anja Kögler
- Faculty of Biology, Institute of Botany, Technische Universität Dresden, 01062, Dresden, Germany
| | - Kathrin M Seibt
- Faculty of Biology, Institute of Botany, Technische Universität Dresden, 01062, Dresden, Germany
| | - Tony Heitkam
- Faculty of Biology, Institute of Botany, Technische Universität Dresden, 01062, Dresden, Germany
| | - Kristin Morgenstern
- Department of Forest Sciences, Institute of Forest Botany and Forest Zoology, Technische Universität Dresden, 01735, Tharandt, Germany
| | - Birgit Reiche
- Department of Forest Sciences, Institute of Forest Botany and Forest Zoology, Technische Universität Dresden, 01735, Tharandt, Germany
| | | | - Heino Wolf
- Staatsbetrieb Sachsenforst, 01796, Pirna, Germany
| | - Doris Krabel
- Department of Forest Sciences, Institute of Forest Botany and Forest Zoology, Technische Universität Dresden, 01735, Tharandt, Germany
| | - Thomas Schmidt
- Faculty of Biology, Institute of Botany, Technische Universität Dresden, 01062, Dresden, Germany
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Wood D, Besnard G, Beerling DJ, Osborne CP, Christin PA. Phylogenomics indicates the "living fossil" Isoetes diversified in the Cenozoic. PLoS One 2020; 15:e0227525. [PMID: 32555586 PMCID: PMC7302493 DOI: 10.1371/journal.pone.0227525] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 05/14/2020] [Indexed: 11/19/2022] Open
Abstract
The fossil record provides an invaluable insight into the temporal origins of extant lineages of organisms. However, establishing the relationships between fossils and extant lineages can be difficult in groups with low rates of morphological change over time. Molecular dating can potentially circumvent this issue by allowing distant fossils to act as calibration points, but rate variation across large evolutionary scales can bias such analyses. In this study, we apply multiple dating methods to genome-wide datasets to infer the origin of extant species of Isoetes, a group of mostly aquatic and semi-aquatic isoetalean lycopsids, which closely resemble fossil forms dating back to the Triassic. Rate variation observed in chloroplast genomes hampers accurate dating, but genome-wide nuclear markers place the origin of extant diversity within this group in the mid-Paleogene, 45-60 million years ago. Our genomic analyses coupled with a careful evaluation of the fossil record indicate that despite resembling forms from the Triassic, extant Isoetes species do not represent the remnants of an ancient and widespread group, but instead have spread around the globe in the relatively recent past.
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Affiliation(s)
- Daniel Wood
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, United Kingdom
| | - Guillaume Besnard
- CNRS, Université de Toulouse, IRD, UMR 5174, EDB (Laboratoire Évolution & Diversité Biologique), Toulouse, France
| | - David J. Beerling
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, United Kingdom
| | - Colin P. Osborne
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, United Kingdom
| | - Pascal-Antoine Christin
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, United Kingdom
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Soto Gomez M, Lin Q, Silva Leal E, Gallaher TJ, Scherberich D, Mennes CB, Smith SY, Graham SW. A bi‐organellar phylogenomic study of Pandanales: inference of higher‐order relationships and unusual rate‐variation patterns. Cladistics 2020; 36:481-504. [DOI: 10.1111/cla.12417] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 12/21/2022] Open
Affiliation(s)
- Marybel Soto Gomez
- Department of Botany University of British Columbia 6270 University Boulevard Vancouver BC V6T 1Z4 Canada
- UBC Botanical Garden & Centre for Plant Research University of British Columbia 6804 Marine Drive SW Vancouver BC V6T 1Z4 Canada
| | - Qianshi Lin
- Department of Botany University of British Columbia 6270 University Boulevard Vancouver BC V6T 1Z4 Canada
- UBC Botanical Garden & Centre for Plant Research University of British Columbia 6804 Marine Drive SW Vancouver BC V6T 1Z4 Canada
| | - Eduardo Silva Leal
- Universidade Federal Rural da Amazônia, Campus Capanema Avenida Barão de Capanema s/n Capanema68700-665 PA Brazil
| | | | - David Scherberich
- Jardin Botanique de la Ville de Lyon Mairie de Lyon69205 Lyon Cedex 01 France
| | | | - Selena Y. Smith
- Department of Earth & Environmental Sciences and Museum of Paleontology University of Michigan Ann Arbor MI 48109 USA
| | - Sean W. Graham
- Department of Botany University of British Columbia 6270 University Boulevard Vancouver BC V6T 1Z4 Canada
- UBC Botanical Garden & Centre for Plant Research University of British Columbia 6804 Marine Drive SW Vancouver BC V6T 1Z4 Canada
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Cevallos MA, Guerrero G, Ríos S, Arroyo A, Villalobos MA, Porta H. The mitogenome of Pseudocrossidium replicatum, a desiccation-tolerant moss. MITOCHONDRIAL DNA PART B-RESOURCES 2020; 5:2339-2341. [PMID: 33457783 PMCID: PMC7782723 DOI: 10.1080/23802359.2020.1774436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Bryophytes are the earliest plant group on Earth. They are a fundamental component of many ecosystems around the World. Some of their main roles are related to soil development, water retention, and biogeochemical cycling. Bryophytes include liverworts, hornworts, and mosses. The sequencing of chloroplast and mitochondria genomes has been useful to elucidate the taxonomy of this heterogeneous plant group. To date, despite their ecological importance only 41 mosses mitogenomes have been deposited in the GenBank. Here, the complete mitochondria genome sequence of Pseudocrossidium replicatum, a moss of the Pottiaceae family isolated in Tlaxcala, Mexico, is reported. The mitochondrial genome size of P. replicatum comprises 105,495 bp and contains the groups of genes described for other bryophytes mitogenomes. Our phylogenetic analysis shows that during the evolution of the mosses’ mitogenome, nad7, rps4, rpl16, and rpl10 genes were lost independently in several lineages. The complete mitogenome sequence reported here would be a useful tool for our comprehension of the evolutionary and population genetics of this group of plants.
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Affiliation(s)
- Miguel A Cevallos
- Centro de Ciencias Genómicas, Programa de Genómica Evolutiva, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, C.P., México
| | - Gabriela Guerrero
- Centro de Ciencias Genómicas, Programa de Genómica Evolutiva, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, C.P., México
| | - Selma Ríos
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional. Tepetitla de Lardizábal, Tlaxcala, C.P., México
| | - Analilia Arroyo
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional. Tepetitla de Lardizábal, Tlaxcala, C.P., México
| | - Miguel Angel Villalobos
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional. Tepetitla de Lardizábal, Tlaxcala, C.P., México
| | - Helena Porta
- Instituto de Biotecnología, Departamento de Biología Molecular de Plantas, Universidad Nacional Autónoma de México, Morelos, C.P., México
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Hernández-Hernández T, Wiens JJ. Why Are There So Many Flowering Plants? A Multiscale Analysis of Plant Diversification. Am Nat 2020; 195:948-963. [DOI: 10.1086/708273] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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46
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Xie DF, Tan JB, Yu Y, Gui LJ, Su DM, Zhou SD, He XJ. Insights into phylogeny, age and evolution of Allium (Amaryllidaceae) based on the whole plastome sequences. ANNALS OF BOTANY 2020; 125:1039-1055. [PMID: 32239179 PMCID: PMC7262478 DOI: 10.1093/aob/mcaa024] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/01/2020] [Indexed: 05/22/2023]
Abstract
BACKGROUND AND AIMS The genus Allium L., one of the largest monocotyledonous genera and one that includes many economically important crops with nutritional and medicinal value, has been the focus of classification or phylogeny studies for centuries. Recent studies suggested that the genus can be divided into 15 subgenera and 72 sections, which were further classified into three evolutionary lineages. However, the phylogenetic relationships reconstructed by one or two loci showed weaker support, especially for the third evolutionary lineage, which might not show the species relationships very clearly and could hinder further adaptive and evolutionary study. METHODS In this study, a total of 39 complete chloroplast genomes of Allium (covering 12 Allium subgenera) were collected, and combining these with 125 species of plastomes from 19 other families of monocots, we reconstructed the phylogeny of the genus Allium, estimated the origin and divergence time of the three evolutionary lineages and investigated the adaptive evolution in this genus and related families. RESULTS Our phylogenetic analysis confirmed the monophyly and three evolutionary lineages of Allium, while new species relationships were detected within the third evolutionary lineage. The divergence time of the three evolutionary lineages was estimated to be in the early Eocene to the middle Miocene, and numerous positive selected genes (PSGs) and PSGs with high average Ka/Ks values were found in Allium species. CONCLUSIONS Our results detected a well-supported phylogenetic relationship of Allium. The PSGs and PSGs with high Ka/Ks values, as well as diversified morphologies, complicated chromosome characteristics and unique reproductive modes may play important roles in the adaptation and evolution of Allium species. This is the first study that conducted phylogenetic and evolutionary analyses on the genus Allium combined with the plastome and morphological and cytological data. We hope that this study can contribute to further analysis of Allium for other researchers.
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Affiliation(s)
- Deng-Feng Xie
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Jin-Bo Tan
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yan Yu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Lin-Jian Gui
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Dan-Mei Su
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Song-Dong Zhou
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xing-Jin He
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People’s Republic of China
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Kitagawa R, Mimura M, Mori AS, Sakai A. Phylogenetic signal in the topographic niche of trees: Current and historical significance of habitat structure on the species arrangement pattern within East Asian rugged forests. Ecol Res 2020. [DOI: 10.1111/1440-1703.12110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ryo Kitagawa
- Kansai Research Center Forestry and Forest Products Research Institute Kyoto Japan
- Graduate School of Environment and Information Sciences Yokohama National University Yokohama Japan
| | - Makiko Mimura
- Department of Biology, Graduate School of Natural Science and Technology Okayama University Okayama Japan
| | - Akira S. Mori
- Graduate School of Environment and Information Sciences Yokohama National University Yokohama Japan
| | - Akiko Sakai
- Graduate School of Environment and Information Sciences Yokohama National University Yokohama Japan
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48
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Carruthers T, Muñoz-Rodríguez P, Wood JRI, Scotland RW. The temporal dynamics of evolutionary diversification in Ipomoea. Mol Phylogenet Evol 2020; 146:106768. [PMID: 32081764 DOI: 10.1016/j.ympev.2020.106768] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 10/25/2022]
Abstract
Molecular phylogenies are used as a basis for making inferences about macroevolutionary history. However, a robust phylogeny does not contain the information that is necessary to make many of these inferences. Complex methodologies that incorporate important assumptions about the nature of evolutionary history are therefore required. Here, we explore the implications of these assumptions for making inferences about the macroevolutionary history of Ipomoea - a large pantropical genus of flowering plants that contains the sweet potato (Ipomoea batatas), a crop of global economic importance. We focus on assumptions that underlie inferences of divergence times, and diversification parameters (speciation rates, extinction rates, and net diversification rates). These are among the most fundamental variables in macroevolutionary research. We use a series of novel approaches to explore the implications of these assumptions for inferring the age of Ipomoea, the ages of major clades within Ipomoea, whether there are significant differences in diversification parameters among clades within Ipomoea, and whether the storage root of I. batatas evolved in pre-human times. We show that inferring an age estimate for Ipomoea and major clades within Ipomoea is highly problematic. Inferred divergence times are sensitive to uncertain fossil calibrations and differing assumptions about among-branch-substitution-rate-variation. Despite this uncertainty, we are able to make robust inferences about patterns of variation in diversification parameters within Ipomoea, and that the storage root of I. batatas evolved in pre-human times. Taken together, this study presents novel and generalizable insights into the implications of methodological assumptions for making inferences about macroevolutionary history. Further, by presenting novel findings relating to the temporal dynamics of evolution in Ipomoea, as well as more specifically to I. batatas, this study makes a valuable contribution to our understanding of tropical plant evolution, and the evolutionary context in which economically important crops evolve.
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Affiliation(s)
- Tom Carruthers
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
| | - Pablo Muñoz-Rodríguez
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
| | - John R I Wood
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
| | - Robert W Scotland
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom.
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Nie Y, Foster CSP, Zhu T, Yao R, Duchêne DA, Ho SYW, Zhong B. Accounting for Uncertainty in the Evolutionary Timescale of Green Plants Through Clock-Partitioning and Fossil Calibration Strategies. Syst Biol 2020; 69:1-16. [PMID: 31058981 DOI: 10.1093/sysbio/syz032] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 04/30/2019] [Accepted: 05/02/2019] [Indexed: 11/13/2022] Open
Abstract
Establishing an accurate evolutionary timescale for green plants (Viridiplantae) is essential to understanding their interaction and coevolution with the Earth's climate and the many organisms that rely on green plants. Despite being the focus of numerous studies, the timing of the origin of green plants and the divergence of major clades within this group remain highly controversial. Here, we infer the evolutionary timescale of green plants by analyzing 81 protein-coding genes from 99 chloroplast genomes, using a core set of 21 fossil calibrations. We test the sensitivity of our divergence-time estimates to various components of Bayesian molecular dating, including the tree topology, clock models, clock-partitioning schemes, rate priors, and fossil calibrations. We find that the choice of clock model affects date estimation and that the independent-rates model provides a better fit to the data than the autocorrelated-rates model. Varying the rate prior and tree topology had little impact on age estimates, with far greater differences observed among calibration choices and clock-partitioning schemes. Our analyses yield date estimates ranging from the Paleoproterozoic to Mesoproterozoic for crown-group green plants, and from the Ediacaran to Middle Ordovician for crown-group land plants. We present divergence-time estimates of the major groups of green plants that take into account various sources of uncertainty. Our proposed timeline lays the foundation for further investigations into how green plants shaped the global climate and ecosystems, and how embryophytes became dominant in terrestrial environments.
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Affiliation(s)
- Yuan Nie
- College of Life Sciences, Nanjing Normal University, Nanjing 210046, China
| | - Charles S P Foster
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Tianqi Zhu
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100000, China
| | - Ru Yao
- College of Life Sciences, Nanjing Normal University, Nanjing 210046, China
| | - David A Duchêne
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Simon Y W Ho
- School of Life and Environmental Sciences, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Bojian Zhong
- College of Life Sciences, Nanjing Normal University, Nanjing 210046, China
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50
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Carruthers T, Scotland RW. Insights from Empirical Analyses and Simulations on Using Multiple Fossil Calibrations with Relaxed Clocks to Estimate Divergence Times. Mol Biol Evol 2020; 37:1508-1529. [DOI: 10.1093/molbev/msz310] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Abstract
Relaxed clock methods account for among-branch-rate-variation when estimating divergence times by inferring different rates for individual branches. In order to infer different rates for individual branches, important assumptions are required. This is because molecular sequence data do not provide direct information about rates but instead provide direct information about the total number of substitutions along any branch, which is a product of the rate and time for that branch. Often, the assumptions required for estimating rates for individual branches depend heavily on the implementation of multiple fossil calibrations in a single phylogeny. Here, we show that the basis of these assumptions is often critically undermined. First, we highlight that the temporal distribution of the fossil record often violates key assumptions of methods that use multiple fossil calibrations with relaxed clocks. With respect to “node calibration” methods, this conclusion is based on our inference that different fossil calibrations are unlikely to reflect the relative ages of different clades. With respect to the fossilized birth–death process, this conclusion is based on our inference that the fossil recovery rate is often highly heterogeneous. We then demonstrate that methods of divergence time estimation that use multiple fossil calibrations are highly sensitive to assumptions about the fossil record and among-branch-rate-variation. Given the problems associated with these assumptions, our results highlight that using multiple fossil calibrations with relaxed clocks often does little to improve the accuracy of divergence time estimates.
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Affiliation(s)
- Tom Carruthers
- Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
| | - Robert W Scotland
- Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
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