PapersFlow Research Brief
Plant Diversity and Evolution
Research Guide
What is Plant Diversity and Evolution?
Plant Diversity and Evolution is the study of how plant lineages—especially flowering plants (angiosperms)—originate, diversify, and are classified through time using evidence from phylogenetics, taxonomy, and biogeography.
Plant Diversity and Evolution research commonly reconstructs evolutionary relationships among plant groups using molecular and morphological data analyzed with phylogenetic inference methods and explicit models of character change.
Topic Hierarchy
Research Sub-Topics
Angiosperm Phylogeny Group Classification
This sub-topic focuses on the development and updates of the APG classification systems for angiosperm orders and families based on molecular and morphological data. Researchers study taxonomic revisions, phylogenetic relationships, and standardization of flowering plant nomenclature.
Molecular Phylogenetics of Flowering Plants
This sub-topic examines the use of DNA sequence data and computational tools for reconstructing evolutionary trees of angiosperms. Researchers investigate gene selection, model-based inference, and resolution of deep phylogenetic nodes.
Historical Biogeography of Angiosperms
This sub-topic explores the geographic origins, dispersal, and vicariance events shaping angiosperm distributions over geological time. Researchers apply phylogeographic models and fossil-calibrated phylogenies to trace migration patterns.
Angiosperm Diversification Rates
This sub-topic analyzes temporal patterns of speciation and extinction in flowering plants using birth-death models and lineage-through-time plots. Researchers identify adaptive radiations and drivers of clade-specific diversity.
Phylogenetic Software Development for Plants
This sub-topic covers the creation and optimization of software tools like PHYLIP, TNT, and IQ-TREE for plant phylogenetic analysis. Researchers focus on algorithms for tree inference, model partitioning, and handling large genomic datasets.
Why It Matters
Plant Diversity and Evolution underpins practical classification systems used across biodiversity science, conservation, and agriculture by providing stable, phylogeny-based names and groupings for communication and decision-making. "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV" (2016) formalized an updated, widely used angiosperm classification and recognized several new orders—Boraginales, Dilleniales, Icacinales, Metteniusiales, and Vahliales—directly affecting how herbaria, floras, and regulatory or conservation lists organize flowering-plant diversity. In applied plant biology, physiological measurement frameworks also matter: Scholander et al. (1965) in "Sap Pressure in Vascular Plants" reported that xylem sap pressures during transpiration are normally negative and ranged from about −4 or −5 atmospheres in a damp forest to −80 atmospheres in the desert, values that inform how researchers interpret drought stress, salt tolerance (e.g., halophytes), and water-transport constraints across diverse plant lineages. Methodologically, widely adopted software systems—Felsenstein’s "PHYLIP-Phylogeny inference package (Version 3.2)" (1989), Goloboff et al.’s "TNT, a free program for phylogenetic analysis" (2008), and Trifinopoulos et al.’s "W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis" (2016)—enable reproducible phylogenetic hypotheses that feed into comparative studies of diversification, trait evolution, and historical biogeography, which in turn guide sampling priorities and taxonomic revisions.
Reading Guide
Where to Start
Start with "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV" (2016) because it defines the reference classification framework that most comparative, floristic, and systematic work on angiosperms must map onto.
Key Papers Explained
The classification backbone is provided by THE ANGIOSPERM PHYLOGENY GROUP’s "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (2009) and The Angiosperm Phylogeny Group’s "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV" (2016), which translate phylogenetic evidence into a usable taxonomy. Methodologically, Felsenstein’s "PHYLIP-Phylogeny inference package (Version 3.2)" (1989) represents foundational computational infrastructure for phylogeny inference, while Gouy et al.’s "SeaView Version 4: A Multiplatform Graphical User Interface for Sequence Alignment and Phylogenetic Tree Building" (2009) and Dereeper et al.’s "Phylogeny.fr: robust phylogenetic analysis for the non-specialist" (2008) emphasize end-to-end workflows that lower barriers to alignment and tree reconstruction. Lanfear et al.’s "PartitionFinder 2: New Methods for Selecting Partitioned Models of Evolution for Molecular and Morphological Phylogenetic Analyses" (2016) and Trifinopoulos et al.’s "W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis" (2016) focus on model choice and maximum-likelihood inference, which strongly influence topology and support values that later inform taxonomic decisions and trait-evolution analyses.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
A practical frontier is integrating large-scale, web-accessible inference ("W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis") with transparent, pipeline-based analysis and model-selection ("PartitionFinder 2: New Methods for Selecting Partitioned Models of Evolution for Molecular and Morphological Phylogenetic Analyses") so that phylogenies used for classification (APG III/APG IV) can be updated reproducibly as new data accumulate. Another frontier is improving how non-specialist platforms ("Phylogeny.fr: robust phylogenetic analysis for the non-specialist") and GUI environments ("SeaView Version 4: A Multiplatform Graphical User Interface for Sequence Alignment and Phylogenetic Tree Building") document parameters and uncertainty, because small differences in alignment, partitioning, or inference settings can propagate into different conclusions about diversification and biogeographic history.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | PHYLIP-Phylogeny inference package (Version 3.2) | 1989 | Cladistics | 17.9K | ✕ |
| 2 | An update of the Angiosperm Phylogeny Group classification for... | 2016 | Botanical Journal of t... | 9.4K | ✓ |
| 3 | SeaView Version 4: A Multiplatform Graphical User Interface fo... | 2009 | Molecular Biology and ... | 5.7K | ✓ |
| 4 | MacClade 4.0: analysis of phylogeny and character evolution | 2001 | Choice Reviews Online | 5.6K | ✕ |
| 5 | TNT, a free program for phylogenetic analysis | 2008 | Cladistics | 5.3K | ✓ |
| 6 | W-IQ-TREE: a fast online phylogenetic tool for maximum likelih... | 2016 | Nucleic Acids Research | 5.2K | ✓ |
| 7 | PartitionFinder 2: New Methods for Selecting Partitioned Model... | 2016 | Molecular Biology and ... | 5.2K | ✓ |
| 8 | An update of the Angiosperm Phylogeny Group classification for... | 2009 | Botanical Journal of t... | 4.8K | ✕ |
| 9 | Phylogeny.fr: robust phylogenetic analysis for the non-specialist | 2008 | Nucleic Acids Research | 4.7K | ✓ |
| 10 | Sap Pressure in Vascular Plants | 1965 | Science | 4.4K | ✕ |
In the News
Earth BioGenome Project
**Journal:** *Trends in Ecology and Evolution* (2025 )
Artificial Intelligence: Unlocking the Power of Plants and ...
NYBG is honored to be one of 15 global recipients of Phase II of the Bezos Earth Fund’s AI Grand Challenge for Climate Change and Nature to harnesses the power of cutting-edge, responsible Artifici...
Developmentally regulated genes drive phylogenomic splits in ovule evolution
gymnosperm-specific ovule structures. Our work provides a resource for seed gene discovery, conservation, and crop improvement.
The Earth BioGenome Project Phase II: illuminating the eukaryotic tree of life
* We propose the establishment of a US$0.5 billion Foundational Impact Project (FIF) fund to support the immediate use of the genome sequences in conservation, agriculture, biodiversity monitoring,...
Sticking together under stress: NSF grant brings plant ...
Davis and Szymanski formed an interdisciplinary collaboration and were funded by a National Science Foundation Transitions to Excellence grant . They each hired a postdoctoral researcher who would ...
Code & Tools
PhyloNext is the automated pipeline for the analysis of phylogenetic diversity using GBIF occurrence data , species phylogenies from Open Tree of L...
This package provides functions for calculating probabilistic phylogenetic diversity metrics. These metrics are necessary when there is uncertainty...
The package `eve` is an evolution emulator which provides pipelines to do phylogenetic-diversity-dependent simulation, analyse outputs and generate...
Phylogenetic diversity (PD) is a measure of biodiversity which takes evolution into account. It is calculated as the sum of the lengths of the phyl...
interact with the software produced by the [Open Tree of Life project] 1 . Specifically, to: 1. interact with a local version of the [phylesystem] ...
Recent Preprints
Plant diversity shapes chemical communication in ...
"Plant diversity has a direct impact on the co-evolution of species, the stability of ecosystems, and nature conservation. The loss of biodiversity can disrupt visible interactions between species ...
Genetic Diversity and Evolutionary Ecology of Medicinal ...
Medicinal plants across the world are exemplary models for studying the evolutionary and ecological processes that shape plant diversity, adaptation, and resilience. Regions of exceptional biodiver...
Study provides framework for 1 billion years of green plant ...
The One Thousand Plant Transcriptomes Initiative (1KP) is a global collaboration to examine the diversification of plant species, genes and genomes across the more than one-billion-year history of ...
Evolutionary age correlates with range size across plants and ...
More than 40 thousand species of plants and animals are facing extinction worldwide. Range size is one of the strongest determinants of extinction risk, but the causes underlying the wide variation...
Plant Systematics and Evolution: Diversity in Space and Time
Tony’s research straddles systematics, biogeography, evolutionary biology, ecology, and ecophysiology. As such, it is integrative and exploits diverse data types and analytical approaches. Much of ...
Latest Developments
Recent developments in plant diversity and evolution research include the publication of a comprehensive genomic tree of life for nearly 8,000 angiosperm genera, revealing complex evolutionary histories and diversification surges, as reported in Nature on August 21, 2024, and a new, detailed tree of life for flowering plants that suggests tangled roots and ancient interbreeding events, published in Nature on July 5, 2024 (nature.com, science.org). Additionally, a study published in January 2026 in Nature Ecology and Evolution highlights significant recent shifts in tree diversity in Amazon and Andean forests due to global change (phys.org).
Sources
Frequently Asked Questions
What is the Angiosperm Phylogeny Group (APG) classification used for in plant diversity research?
The APG classification provides a consensus, phylogeny-based system for naming and arranging orders and families of flowering plants so results are comparable across studies. "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV" (2016) updated earlier APG schemes and recognized new orders including Boraginales, Dilleniales, Icacinales, Metteniusiales, and Vahliales.
How do researchers infer evolutionary relationships among plant taxa from sequence data?
Researchers typically align homologous DNA or protein sequences and infer trees using methods such as maximum likelihood, then evaluate support and compare alternative hypotheses. Gouy et al. (2009) in "SeaView Version 4: A Multiplatform Graphical User Interface for Sequence Alignment and Phylogenetic Tree Building" described an interface that integrates alignment and tree building, while Trifinopoulos et al. (2016) in "W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis" described a web-accessible maximum-likelihood workflow.
Which tools are commonly used to build and manage phylogenetic analyses in plant systematics?
Commonly used tools include general phylogeny packages, interfaces for alignment and inference, and platforms that chain steps into pipelines. Felsenstein (1989) introduced "PHYLIP-Phylogeny inference package (Version 3.2)", Dereeper et al. (2008) presented "Phylogeny.fr: robust phylogenetic analysis for the non-specialist", and Goloboff et al. (2008) described "TNT, a free program for phylogenetic analysis" for phylogenetic reconstruction, especially in parsimony-based workflows.
How do researchers choose evolutionary models and partitioning schemes for phylogenetic datasets?
Researchers often test alternative partitioning schemes and substitution models to better fit heterogeneous molecular or morphological datasets. Lanfear et al. (2016) in "PartitionFinder 2: New Methods for Selecting Partitioned Models of Evolution for Molecular and Morphological Phylogenetic Analyses" described automated selection of best-fit partitioning schemes and models aimed at improving phylogenetic inference.
How is character evolution analyzed once a plant phylogeny has been estimated?
Character evolution is studied by mapping traits onto a phylogeny and evaluating alternative reconstructions of ancestral states and transitions. "MacClade 4.0: analysis of phylogeny and character evolution" (2001) described interactive tools for analyzing molecular and morphological data and exploring character evolution on trees.
What empirical measurements connect plant physiological diversity to evolutionary and ecological comparisons?
Direct measurements of water-transport variables provide comparable physiological traits that can be studied across taxa and environments. Scholander et al. (1965) in "Sap Pressure in Vascular Plants" described a method to measure xylem sap pressure and reported negative pressures during transpiration ranging from about −4 or −5 atmospheres in damp forest conditions to −80 atmospheres in desert conditions.
Open Research Questions
- ? How can phylogeny-based classifications such as APG III and APG IV be systematically reconciled with conflicting signals across different datasets and inference methods (e.g., maximum likelihood vs. parsimony) when estimating deep angiosperm relationships?
- ? Which partitioning strategies and model-selection criteria (as operationalized in "PartitionFinder 2: New Methods for Selecting Partitioned Models of Evolution for Molecular and Morphological Phylogenetic Analyses") yield the most robust plant phylogenies when combining molecular and morphological matrices with different missing-data patterns?
- ? How sensitive are downstream inferences of trait evolution to interactive reconstruction choices and uncertainty visualization approaches described in "MacClade 4.0: analysis of phylogeny and character evolution"?
- ? What are the practical limits of usability-focused phylogenetic platforms ("Phylogeny.fr: robust phylogenetic analysis for the non-specialist" and "W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis") for ensuring reproducibility and consistent parameterization across large, collaborative plant systematics projects?
Recent Trends
The provided corpus indicates a very large research area (285,248 works) centered on angiosperm phylogeny, taxonomy, diversification, and historical biogeography.
A notable recent consolidation trend within the supplied papers is the movement from APG III to APG IV as the reference taxonomy for flowering plants: "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV" updated "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (2009) and explicitly recognized new orders including Boraginales, Dilleniales, Icacinales, Metteniusiales, and Vahliales.
2016In parallel, the toolchain emphasis in highly cited methods papers highlights a shift toward accessible, workflow-oriented phylogenetics—via GUI environments (Gouy et al., 2009, "SeaView Version 4: A Multiplatform Graphical User Interface for Sequence Alignment and Phylogenetic Tree Building"), web platforms (Dereeper et al., 2008, "Phylogeny.fr: robust phylogenetic analysis for the non-specialist"), and online maximum-likelihood inference (Trifinopoulos et al., 2016, "W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis")—paired with explicit model and partition selection (Lanfear et al., 2016, "PartitionFinder 2: New Methods for Selecting Partitioned Models of Evolution for Molecular and Morphological Phylogenetic Analyses").
Research Plant Diversity and Evolution with AI
PapersFlow provides specialized AI tools for Agricultural and Biological Sciences researchers. Here are the most relevant for this topic:
Systematic Review
AI-powered evidence synthesis with documented search strategies
AI Literature Review
Automate paper discovery and synthesis across 474M+ papers
Deep Research Reports
Multi-source evidence synthesis with counter-evidence
See how researchers in Agricultural Sciences use PapersFlow
Field-specific workflows, example queries, and use cases.
Start Researching Plant Diversity and Evolution with AI
Search 474M+ papers, run AI-powered literature reviews, and write with integrated citations — all in one workspace.
See how PapersFlow works for Agricultural and Biological Sciences researchers