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Links between environment and stomatal size through evolutionary time in Proteaceae
Citation
Jordan, GJ and Carpenter, RJ and Holland, BR and Beeton, NJ and Woodhams, MD and Brodribb, TJ, Links between environment and stomatal size through evolutionary time in Proteaceae, Proceedings of the Royal Society of London. Biological Sciences, 287, (1919) Article 20192876. ISSN 0962-8452 (2020) [Refereed Article]
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Copyright Statement
Copyright 2020 The Author(s) Published by the Royal Society. All rights reserved.
DOI: doi:10.1098/rspb.2019.2876
Abstract
The size of plant stomata (adjustable pores that determine the uptake of CO2 and loss of water from leaves) is considered to be evolutionarily important. This study uses fossils from the major Southern Hemisphere family Proteaceae to test whether stomatal cell size responded to Cenozoic climate change. We measured the length and abundance of guard cells (the cells forming stomata), the area of epidermal pavement cells, stomatal index and maximum stomatal conductance from a comprehensive sample of fossil cuticles of Proteaceae, and extracted published estimates of past temperature and atmospheric CO2. We developed a novel test based on stochastic modelling of trait evolution to test correlations among traits. Guard cell length increased, and stomatal density decreased significantly with decreasing palaeotemperature. However, contrary to expectations, stomata tended to be smaller and more densely packed at higher atmospheric CO2. Thus, associations between stomatal traits and palaeoclimate over the last 70 million years in Proteaceae suggest that stomatal size is significantly affected by environmental factors other than atmospheric CO2. Guard cell length, pavement cell area, stomatal density and stomatal index covaried in ways consistent with coordinated development of leaf tissues.
Item Details
Item Type: | Refereed Article |
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Keywords: | CO2, Cenozoic, fossil, guard cell, plant evolution |
Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant physiology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Jordan, GJ (Professor Greg Jordan) |
UTAS Author: | Carpenter, RJ (Dr Raymond Carpenter) |
UTAS Author: | Holland, BR (Professor Barbara Holland) |
UTAS Author: | Beeton, NJ (Dr Nicholas Beeton) |
UTAS Author: | Woodhams, MD (Dr Michael Woodhams) |
UTAS Author: | Brodribb, TJ (Professor Tim Brodribb) |
ID Code: | 137051 |
Year Published: | 2020 |
Funding Support: | Australian Research Council (DP160100809) |
Web of Science® Times Cited: | 3 |
Deposited By: | Plant Science |
Deposited On: | 2020-01-30 |
Last Modified: | 2020-03-10 |
Downloads: | 13 View Download Statistics |
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