Publications by Madeline Carins Murphy

Mapping xylem failure in disparate organs of whole plants reveals extreme resistance in olive roots

Rodriguez‐Dominguez, C. M., Carins Murphy, M. R., Lucani, C. and Brodribb, T. J. (2018), Mapping xylem failure in disparate organs of whole plants reveals extreme resistance in olive roots. New Phytol, 218: 1025-1035. doi:10.1111/nph.15079

The capacity of plant species to resist xylem cavitation is an important determinant of resistance to drought, mortality thresholds, geographic distribution and productivity. Unravelling the role of xylem cavitation vulnerability in plant evolution and adaptation requires a clear…

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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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Ferns are less dependent on passive dilution by cell expansion to coordinate leaf vein and stomatal spacing than angiosperms

Ferns are less dependent on passive dilution by cell expansion to coordinate leaf vein and stomatal spacing than angiosperms Carins Murphy MR, Jordan GJ, Brodribb TJ (2017) Ferns are less dependent on passive dilution by cell expansion to coordinate leaf vein and stomatal spacing than angiosperms. PLOS ONE 12(9): e0185648. https://doi.org/10.1371/journal.pone.0185648

Producing leaves with closely spaced veins is a key innovation linked to high rates of photo- synthesis in angiosperms. A close geometric link between veins and stomata in angio- sperms ensures that investment in enhanced venous water transport…

Vein density is independent of epidermal cell size in Arabidopsis mutants

Carins Murphy Madeline R., Dow Graham J., Jordan Gregory J., Brodribb Timothy J. (2017) Vein density is independent of epidermal cell size in Arabidopsis mutants. Functional Plant Biology 44, 410-418.

Densities of leaf minor veins and stomata are co-ordinated within and across vascular plants. This maximises the benefit-to-cost ratio of leaf construction by ensuring stomata receive the minimum amount of water required to maintain optimal aperture. A ‘passive…

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Linking auxin with photosynthetic rate via leaf venation

Scott A M McAdam, Morgane P Eléouët, Melanie Best, Timothy John Brodribb, Madeline Rose Carins Murphy, Sam David Cook, Marion Dalmais, Theodore Dimitriou, Ariane Gelinas-Marion, Warwick M Gill, Matthew Hegarty, Julie M.I. Hofer, Mary Maconochie, Erin L McAdam, Peter McGuiness, David S Nichols, John J. Ross, Frances C. Sussmilch, Shelley Urquhart (2017) Linking auxin with photosynthetic rate via leaf venation. Plant Physiology DOI: https://doi.org/10.1104/pp.17.00535

Land plants lose vast quantities of water to the atmosphere during photosynthetic gas exchange. In angiosperms a complex network of veins irrigates the leaf, and it is widely held that the density and placement of these veins determines…

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Xylem and Stomata, Coordinated Through Time and Space

Land plants exhibit a degree of homeostasis in leaf water content to protect against damage to photosynthetic and xylem tissues, and to maintain an efficient allocation of resources. This is achieved by a strong coordination between the systems…

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Cell expansion not cell differentiation predominantly co-ordinates veins and stomata within and among herbs and woody angiosperms grown under sun and shade

Carins Murphy, MR, Jordan, GJ, Brodribb TJ (2016) Cell expansion not cell differentiation predominantly co-ordinates veins and stomata within and among herbs and woody angiosperms grown under sun and shade. Annals of Botany doi:10.1093/aob/mcw167

Background and aims: It has been proposed that modification of leaf size, driven by epidermal cell size, balances leaf water supply (determined by veins) with transpirational demand (generated by stomata) during acclimation to local irradiance. We aimed to…

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Acclimation to humidity modifies the link between leaf size and the density of veins and stomata

Murphy, MRC., Jordan, GJ, Brodribb, TJ, 2014. Acclimation to humidity modifies the link between leaf size and the density of veins and stomata. Plant Cell and Environment 37, 124-131

The coordination of veins and stomata during leaf acclimation to sun and shade can be facilitated by differential epidermal cell expansion so large leaves with low vein and stomatal densities grow in shade, effectively balancing liquid- and vapour-phase…

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Differential leaf expansion can enable hydraulic acclimation to sun and shade

Carins Murphy MR, Jordan GJ, Brodribb TJ (2012) Differential leaf expansion can enable hydraulic acclimation to sun and shade. Plant, Cell & Environment 35, 1407–1418

Although leaf size is one of the most responsive plant traits to environmental change, the functional benefits of large versus small leaves remain unclear. We hypothesized that modification of leaf size within species resulting from differences in irradiance…

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Acclimation to humidity modifies the link between leaf size and the density of veins and stomata

Carins Murphy MR, Jordan GJ, & Brodribb TJ (2014) Acclimation to humidity modifies the link between leaf size and the density of veins and stomata. Plant, Cell & Environment 37(1):124-131.

The coordination of veins and stomata during leaf acclimation to sun and shade can be facilitated by differential epidermal cell expansion so large leaves with low vein and stomatal densities grow in shade, effectively balancing liquid- and vapour-phase…

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