Phylogenomic analysis supports the deep and gradual evolution of water conducting tissues
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ID: 321581
2026
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Abstract
Summary The origin of land plants was marked by the evolution of key adaptations to terrestrial environments. The patchy distribution of many of these traits in bryophytes, including water conducting tissues, raises questions about whether these features share a common evolutionary origin or arose independently. Molecular data from 160 species were analysed using phylogenomic approaches to investigate bryophyte genome evolution and the origins of water conducting tissues. Hornworts were identified as the most genomically reduced bryophyte lineage. Many of the gene families absent in hornworts are associated with developmental processes, including those important for water conducting cells, which are not found in this group. Comparative analyses of xylem developmental gene networks across bryophytes revealed a mosaic of evolutionary mechanisms - gene loss, duplication, and co-option - underpinning the emergence of water conduction. These results indicate that reductive, convergent, and tracheophyte-specific evolutionary processes all contributed to the development of water conducting tissues in land plants. Together, these findings highlight how multiple genetic mechanisms drove the deep and gradual evolution of water conducting tissues, a key innovation that enabled the successful establishment of plants in terrestrial environments.
| Reference Key |
openalex_W7169682875
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|---|---|
| Authors | Alexander M. C. Bowles |
| Journal | Plant physiology and biochemistry : PPB |
| Year | 2026 |
| DOI |
10.1093/plphys/kiag525
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| URL | |
| Keywords | Keywords not found |
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