Journal: New Phytologist

Xylem cavitation isolates leaky flowers during water stress in pyrethrum

Flowers underpin plant evolution, genetic legacy and global food supply. They are exposed to similar evaporative conditions as leaves, yet floral physiology is a product of different selective forces. We used Tanacetum cinerariifolium, a perennial daisy, to examine the…

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….

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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Similar geometric rules govern the distribution of veins and stomata in petals, sepals and leaves

Zhang, F. , Carins Murphy, M. R., Cardoso, A. A., Jordan, G. J. and Brodribb, T. J. (2018), Similar geometric rules govern the distribution of veins and stomata in petals, sepals and leaves. New Phytol. . doi:10.1111/nph.15210

Investment in leaf veins (supplying xylem water) is balanced by stomatal abundance, such that sufficient water transport is provided for stomata to remain open when soil water is abundant. This coordination is mediated by a common dependence of…

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Casting light on xylem vulnerability in an herbaceous species reveals a lack of segmentation

Finding thresholds at which loss of plant functionality occurs during drought is critical for predicting future crop productivity and survival. Xylem resistance to embolism has been suggested as a key trait associated with water-stress tolerance. Although a substantial…

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Progressing from ‘functional’ to mechanistic traits

Brodribb, T (2017) Progressing from 'functional' to mechanistic traits. New Phytologist 215:9-11

This issue of New Phytologist contains a very exciting paper by Larter etal. (2017, pp. 97–112) showing how millions of years of progressive aridification in Australia led to dramatic evolution in water transport capabilities in this country’s most…

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Casting light on xylem vulnerability in an herbaceous species reveals a lack of segmentation

Skelton, RP, Brodribb, TJ, Choat, B (2017) Catsing light on xylem vulnerability in an herbaceous species reveals a lack of segmentation. New Phytologist 214: 561-569

Summary Finding thresholds at which loss of plant functionality occurs during drought is critical for predicting future crop productivity and survival. Xylem resistance to embolism has been suggested as a key trait associated with water-stress tolerance. Although a…

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Transport efficiency through uniformity: Organization of veins and stomata in angiosperm leaves

Summary Leaves of vascular plants use specific tissues to irrigate the lamina (veins) and to regulate water loss (stomata), to approach homeostasis in leaf hydration during photosynthesis. As both tissues come with attendant costs, it would be expected…

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Visual quantification of embolism reveals leaf vulnerability to hydraulic failure

Brodribb, T. J., Skelton, R. P., McAdam, S. A. M., Bienaimé, D., Lucani, C. J. and Marmottant, P. (2016), Visual quantification of embolism reveals leaf vulnerability to hydraulic failure. New Phytol, 209: 1403–1409. doi:10.1111/nph.13846

Summary Vascular plant mortality during drought has been strongly linked to a failure of the internal water transport system caused by the rapid invasion of air and subsequent blockage of xylem conduits. Quantification of this critical process is…

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Transport efficiency through uniformity: organization of veins and stomata in angiosperm leaves

Fiorin, L., Brodribb, T. J. and Anfodillo, T. (2016), Transport efficiency through uniformity: organization of veins and stomata in angiosperm leaves. New Phytol, 209: 216–227. doi:10.1111/nph.13577

Summary Leaves of vascular plants use specific tissues to irrigate the lamina (veins) and to regulate water loss (stomata), to approach homeostasis in leaf hydration during photosynthesis. As both tissues come with attendant costs, it would be expected…

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