Projects per year
The origin of land plants was accompanied by new adaptations to life on land, including the evolution of stomata—pores on the surface of plants that regulate gas exchange. The genes that underpin the development and function of stomata have been extensively studied in model angiosperms, such as Arabidopsis. However, little is known about stomata in bryophytes, and their evolutionary origins and ancestral function remain poorly understood. Here, we resolve the position of bryophytes in the land plant tree and investigate the evolutionary origins of genes that specify stomatal development and function. Our analyses recover bryophyte monophyly and demonstrate that the guard cell toolkit is more ancient than has been appreciated previously. We show that a range of core guard cell genes, including SPCH/MUTE, SMF, and FAMA, map back to the common ancestor of embryophytes or even earlier. These analyses suggest that the first embryophytes possessed stomata that were more sophisticated than previously envisioned and that the stomata of bryophytes have undergone reductive evolution, including their complete loss from liverworts.
|Number of pages||15|
|Early online date||16 Apr 2020|
|Publication status||Published - 8 Jun 2020|
- plant evolution
- air pores
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- 1 Finished
Rooting the eukaryotic radiation with new models of gene and genome evolution
1/01/17 → 15/07/20
Dr Tom Williams
- School of Biological Sciences - Associate Professor in Molecular Evolution