Year: 2014

Using fossil leaves as evidence for open vegetation

Gregory J. Jordan, Raymond J. Carpenter, Timothy J. Brodribb, Using fossil leaves as evidence for open vegetation, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 395, 1 February 2014, Pages 168-175, ISSN 0031-0182, http://dx.doi.org/10.1016/j.palaeo.2013.12.035.

The ability to discriminate between open vegetation and closed forest in the fossil record is constrained by a paucity of suitable proxies. Taxonomy-based proxies (especially the floristic composition of fossil pollen assemblages) provide the main tool for inferring…

Effect of limited water availability on foliar plant secondary metabolites of two Eucalyptus species

AB McKiernan, MJ Hovenden, TJ Brodribb, BM Potts (2014) Effect of limited water availability on foliar plant secondary metabolites of two Eucalyptus species. Environmental and Experimental Botany 105: 55-64

Abstract Plant secondary metabolites (PSMs) have many ecological roles such as influencing decomposition, flammability and herbivory. PSM concentrations are genetically determined, but are also affected by environmental factors. Drought periods are predicted to become more frequent in many…

Paleo-Antarctic rainforest into the modern Old World tropics: The rich past and threatened future of the “southern wet forest survivors”

ABSTRACT • Premise of study: Have Gondwanan rainforest floral associations survived? Where do they occur today? Have they survived continuously in particular locations? How significant is their living floristic signal? We revisit these classic questions in light of significant recent…

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The influence of branch order on optimal leaf vein geometries: Murray’s Law and area preserving branching

Price CA, Knox S-JC, Brodribb TJ (2013) The Influence of Branch Order on Optimal Leaf Vein Geometries: Murray’s Law and Area Preserving Branching. PLoS ONE 8(12): e85420. doi:10.1371/journal.pone.0085420

Models that predict the form of hierarchical branching networks typically invoke optimization based on biomechanical similitude, the minimization of impedance to fluid flow, or construction costs. Unfortunately, due to the small size and high number of vein segments…

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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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Understanding the low photosynthetic rates of sun and shade coffee leaves: bridging the gap on the relative roles of hydraulic, diffusive and biochemical constraints to photosynthesis.

Martins, S. C. V, Galmés, J., Cavatte, P. C., Pereira, L. F., Ventrella, M. C., & Damatta, F. M. (2014). Understanding the low photosynthetic rates of sun and shade coffee leaves: bridging the gap on the relative roles of hydraulic, diffusive and biochemical constraints to photosynthesis. PloS One, 9(4), e95571. doi:10.1371/journal.pone.0095571

It has long been held that the low photosynthetic rates (A) of coffee leaves are largely associated with diffusive constraints to photosynthesis. However, the relative limitations of the stomata and mesophyll to the overall diffusional constraints to photosynthesis,…

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Separating Active and Passive Influences on Stomatal Control of Transpiration

McAdam S.A.M, Brodribb, T.J. (2014) Separating Active and Passive Influences on Stomatal Control of Transpiration. Plant Physiology, 164: 1578–1586

Motivated by studies suggesting that the stomata of ferns and lycophytes do not conform to the standard active abscisic acid (ABA) -mediated stomatal control model, we examined stomatal behavior in a conifer species (Metasequoia glyptostroboides) that is phylogenetically midway…

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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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