Publications by Herve Cochard

Extreme aridity pushes trees to their physical limits

Larter M, Brodribb TJ, Pfautsch S, Burlett R, Cochard H, Delzon S. Exreme Aridity Pushes Trees to their Physical Limits. Plant Physiology 168: 804-807

Drought-induced hydraulic failure is a leading cause of mortality of trees (McDowell et al., 2008; Anderegg et al., 2012) and has become a major concern in light of future climate predictions, with forests across the world showing signs of…

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Are needles of Pinus pinaster more vulnerable to xylem embolism than branches? New insights from X‐ray computed tomography

Bouche, P. S., Delzon, S., Choat, B., Badel, E., Brodribb, T. J., Burlett, R., Cochard, H., Charra-Vaskou, K., Lavigne, B., Li, S., Mayr, S., Morris, H., Torres-Ruiz, J. M., Zufferey, V., and Jansen, S. (2016) Are needles of Pinus pinaster more vulnerable to xylem embolism than branches? New insights from X-ray computed tomography. Plant, Cell & Environment, doi: 10.1111/pce.12680.

Plants can be highly segmented organisms with an independently redundant design of organs. In the context of plant hydraulics, leaves may be less embolism resistant than stems, allowing hydraulic failure to be restricted to distal organs that can…

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Weak tradeoff between xylem safety and xylem‐specific hydraulic efficiency across the world’s woody plant species

Gleason, S. M., Westoby, M., Jansen, S., Choat, B., Hacke, U. G., Pratt, R. B., Bhaskar, R., Brodribb, T. J., Bucci, S. J., Cao, K.-F., Cochard, H., Delzon, S., Domec, J.-C., Fan, Z.-X., Feild, T. S., Jacobsen, A. L., Johnson, D. M., Lens, F., Maherali, H., Martínez-Vilalta, J., Mayr, S., McCulloh, K. A., Mencuccini, M., Mitchell, P. J., Morris, H., Nardini, A., Pittermann, J., Plavcová, L., Schreiber, S. G., Sperry, J. S., Wright, I. J. and Zanne, A. E. (2016), Weak tradeoff between xylem safety and xylem-specific hydraulic efficiency across the world's woody plant species. New Phytol, 209: 123–136. doi:10.1111/nph.13646

Summary The evolution of lignified xylem allowed for the efficient transport of water under tension, but also exposed the vascular network to the risk of gas emboli and the spread of gas between xylem conduits, thus impeding sap…

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Direct X-ray microtomography observation confirms the induction of embolism upon xylem cutting under tension

Torres-Ruiz JM, Jansen S, Choat B, McElrone AJ, Cochard H, Brodribb TJ, Badel E, Burlett R, Bouche PS, Brodersen CR, Li S, Morris H, Delzon S. Direct x-ray microtomography observation confirms the induction of embolism upon xylem cutting under tension. Plant Physiol. 2015 Jan;167(1):40-3. doi: 10.1104/pp.114.249706. Epub 2014 Nov 6.

Embolism resistance is a critically important trait for evaluating the ability of plants to survive and recover from drought periods and predicting future drought-induced forest decline (Choat et al., 2012). However, recent publications have provided evidence that some…

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Hydraulic Failure Defines the Recovery and Point of Death in Water-Stressed Conifers

Brodribb T.J. & Cochard H. (2009) Hydraulic Failure Defines the Recovery and Point of Death in Water-Stressed Conifers. Plant Physiology, 149, 575-584

This study combines existing hydraulic principles with recently developed methods for probing leaf hydraulic function to determine whether xylem physiology can explain the dynamic response of gas exchange both during drought and in the recovery phase after rewatering….

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Global convergence in the vulnerability of forests to drought

Choat B, Jansen S, Brodribb TJ, Cochard H, Delzon S et al. (2012) Global convergence in the vulnerability of forests to drought. Nature 491: 752–755

Shifts in rainfall patterns and increasing temperatures associated with climate change are likely to cause widespread forest decline in regions where droughts are predicted to increase in duration and severity. One primary cause of productivity loss and plant…

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