Research Area: Water Stress Impacts

Factors determining stomatal and non-stomatal (residual) transpiration and their contribution towards salinity tolerance in contrasting barley genotypes

Eighty barley (Hordeum vulgare L.) genotypes of different geographical origin and contrasting in salinity stress tolerance were grown under glasshouse conditions and exposed to high salinity stress (300 mM NaCl) for four weeks to investigate the relationship between leaf gas…

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Residual transpiration as a component of salinity stress tolerance mechanism: a case study for barley

Residual transpiration as a component of salinity stress tolerance mechanism: a case study for barley Md. Hasanuzzaman, Noel W. Davies, Lana Shabala, Meixue Zhou, Tim J. Brodribb and Sergey Shabala https://doi.org/10.1186/s12870-017-1054-y

Background: While most water loss from leaf surfaces occurs via stomata, part of this loss also occurs through the leaf cuticle, even when the stomata are fully closed. This component, termed residual transpiration, dominates during the night and…

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Assessing the suitability of various screening methods as a proxy for drought tolerance in barley

Hasanuzzaman. Md, Shabala. L, Brodribb. TJ, Zhou. M, Shabala. S (2017) Assessing the suitability of various screening methods as a proxy for drought tolerance in barley. Functional Plant Biology 44:253-266

Plant breeders are in the need for a convenient, reproducible, reliable and rapid screening methods to be used as a proxy for drought tolerance for a large number of genotypes. Addressing this need, we compared different physiological measures…

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An integrated hydraulic-hormonal model of conifer stomata predicts water stress dynamics

Deans, RM, Brodribb, TJ, McAdam, SAM (2017) An integrated hydraulic-hormonal model of conifer stomata predicts water stress dynamics. Plant Physiology DOI:10.1104/pp.17.00150

A simple model combining leaf hydraulics and abscisic acid 23 sensitivity can predict stomatal dynamics to short-term changes in plant water status in a conifer.

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Are flowers vulnerable to xylem cavitation during drought?

Zhang F-P, Brodribb TJ (2017) Are flowers vulnerable to xylem cavitation during drought? Proc. R. Soc. B 284:20162642. http://dx.doi.org/10.1098/rspb.2016.2642

Water stress is known to cause xylem cavitation in the leaves, roots and stems of plants, but little is known about the vulnerability of flowers to xylem damage during drought. This is an important gap in our understanding…

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Revealing catastrophic failure of leaf networks under stress

The intricate patterns of veins that adorn the leaves of land plants are among the most important networks in biology. Water flows in these leaf irrigation networks under tension and is vulnerable to embolism- forming cavitations, which cut…

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Assessing the suitability of various screening methods as a proxy for drought tolerance in barley

Md. HasanuzzamanA,C, Lana ShabalaA, Tim J. BrodribbB, Meixue ZhouA and Sergey Shabala (2016) Assessing the suitability of various screening methods as a proxy for drought tolerance in barley. Functional Plant Biology http://dx.doi.org/10.1071/FP16263

Plant breeders are in the need for a convenient, reproducible, reliable and rapid screening methods to be used as a proxy for drought tolerance for a large number of genotypes. Addressing this need, we compared different physiological measures…

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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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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…