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Related Concept Videos

Introduction to Seed Plants03:40

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Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
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Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.
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Microscopy Techniques for Interpreting Fungal Colonization in Mycoheterotrophic Plants Tissues and Symbiotic Germination of Seeds
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Constructing a broadly inclusive seed plant phylogeny.

Stephen A Smith1, Joseph W Brown1

  • 1Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109, USA.

American Journal of Botany
|May 11, 2018
PubMed
Summary

This study constructs a dated phylogeny for seed plants by combining genetic and phylogenetic data, revealing patterns of diversification. Further data collection is needed to improve resolution and incorporate uncertainty in evolutionary analyses.

Keywords:
GenBankOpen Tree of Lifeclusteringdivergence-time estimationdiversificationphylogenetic methodsphylogeneticsplant tree of lifeseed plants

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Area of Science:

  • Evolutionary Biology
  • Phylogenetics
  • Macroevolutionary Studies

Background:

  • Large phylogenies are crucial for understanding macroevolutionary patterns and the tree of life.
  • Phylogenetic trees serve as essential tools for systematic, evolutionary, and ecological research.

Purpose of the Study:

  • To construct a comprehensive, dated phylogeny for seed plants (Spermatophyta).
  • To combine genetic data from GenBank with phylogenetic data from the Open Tree of Life project.

Main Methods:

  • Hierarchical clustering of publicly available molecular data for major seed plant clades.
  • Phylogenetic tree construction and divergence time estimation.
  • Integration of data from the Open Tree of Life project.

Main Results:

  • Developed phylogenies for Spermatophyta with up to 353,185 taxa.
  • Diversification analyses revealed nested patterns of rate shifts.
  • Identified significant variation in data overlap and inference uncertainty, highlighting the need for continued data collection.

Conclusions:

  • Demonstrated a method for constructing dated plant phylogenies using combined resources.
  • The approach is an initial step requiring further development for data integration and uncertainty handling.
  • The discussed methods are applicable to other major clades within the tree of life.