Research Area: Stomatal Function and Evolution

Advanced vascular function discovered in a widespread moss

The evolution of terrestrial plants capable of growing upwards into the dry atmosphere profoundly transformed the Earth. A transition from small, ‘non-vascular’ bryophytes to arborescent vascular plants during the Devonian period is partially attributed to the evolutionary innovation…

Declining root water transport drives stomatal closure in olive under moderate water stress

Efficient water transport from soil to leaves sustains stomatal opening and steady‐state photosynthesis. The aboveground portion of this pathway is well‐described, yet the roots and their connection with the soil are still poorly understood due to technical limitations….

Hanging by a thread? Forests and drought

Trees are the living foundations on which most terrestrial biodiversity is built. Central to the success of trees are their woody bodies, which connect their elevated photosynthetic canopies with the essential belowground activities of water and nutrient acquisition….

Guard cells in fern stomata are connected by plasmodesmata, but control cytosolic Ca2+ levels autonomously

Voss, L. J., McAdam, S. A., Knoblauch, M. , Rathje, J. M., Brodribb, T. , Hedrich, R. and Roelfsema, M. R. (2018), Guard cells in fern stomata are connected by plasmodesmata, but control cytosolic Ca2+ levels autonomously. New Phytol, 219: 206-215. doi:10.1111/nph.15153

Recent studies have revealed that some responses of fern stomata to environmental signals differ from those of their relatives in seed plants. However, it is unknown whether the biophysical properties of guard cells differ fundamentally between species of…

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What are the evolutionary origins of stomatal responses to abscisic acid in land plants?

The evolution of active stomatal closure in response to leaf water deficit, mediated by the hormone abscisic acid (ABA), has been the subject of recent debate. Two different models for the timing of the evolution of this response…

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Small Pores with a Big Impact

Small Pores with a Big Impact Michael R. Blatt, Tim J. Brodribb, Keiko U. Torii Plant Physiology Jun 2017, 174 (2) 467-469; DOI: 10.1104/pp.17.00642

This Focus Issue on Stomata is the first dedicated to the evolution, development, and physiology of guard cells, their fundamental relevance to plants and to society. Several reviews and articles in this Focus Issue center around stomata as…

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Amphistomatic leaf surfaces independently regulate gas exchange in response to variations in evaporative demand

Freya Richardson, Timothy J. Brodribb, Gregory J. Jordan; Amphistomatic leaf surfaces independently regulate gas exchange in response to variations in evaporative demand, Tree Physiology, Volume 37, Issue 7, 1 July 2017, Pages 869–878, https://doi.org/10.1093/treephys/tpx073

The occurrence of amphistomatic leaves (stomata on both surfaces) versus hypostomatic leaves (stomata limited to the lower or abaxial surface) has strong associations with environment. Amphistomy provides the advantage of higher conductance of CO2 for photosynthesis, however, unless…

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Does ozone increase ABA levels by non‐enzymatic synthesis causing stomata to close?

McAdam EL, Brodribb TJ, McAdam SAM (2017)Does ozone increase ABA levels by non‐enzymatic synthesis causing stomata to close? Plant, Cell and Environment 40: 741-747

Reactive oxygen species (ROS) are widely recognized as important regulators of stomatal aperture and plant gas exchange. The pathways through which stomata perceive ROS share many commonlinkages with the well characterized signalling pathway for the hormone abscisic acid…

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What are the evolutionary origins of stomatal responses to abscisic acid in land plants?

Sussmilch, FC, Brodribb, TJ, McAdam, SAM (2017) What are the evolutionary origins of stomatal responses to abscisic acid in land plants? Journal of Integrative Plant Biology 59: 240-260

The evolution of active stomatal closure in response to leaf water deficit, mediated by the hormone abscisic acid (ABA), has been the subject of recent debate. Two different models for the timing of the evolution of this response…

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Evolution of the stomatal regulation of plant water content

Brodribb, TJ, McAdam, SAM (2017) Evolution of the stomatal regulation of plant water content. Plant Physiology doi: 10.1104/pp.17.00078

Terrestrial productivity today is regulated by stomatal movements, but this has only been the case 7 since “stomatophytes” became dominant on the land 390 million years ago. In this review we 8 examine evidence for the function of…

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