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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Does sample length influence the shape of xylem embolism vulnerability curves? A test with the Cavitron spinning technique
Plant, Cell and Environment, Volume 33, No. 9, Year 2010
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Description
The Cavitron spinning technique is used to construct xylem embolism vulnerability curves (VCs), but its reliability has been questioned for species with long vessels. This technique generates two types of VC: sigmoid 's'-shaped and exponential, levelling-off 'r'-shaped curves. We tested the hypothesis that 'r'-shaped VCs were anomalous and caused by the presence of vessels cut open during sample preparation. A Cavitron apparatus was used to construct VCs from samples of different lengths in species with contrasting vessel lengths. The results were compared with VCs obtained using other independent techniques. When vessel length exceeded sample length, VCs were 'r'-shaped and anomalous. Filling vessels cut open at both ends with air before measurement produced more typical 's'-shaped VCs. We also found that exposing segments of 11 woody species in a Cavitron at the pressure measured in planta before sampling considerably increased the degree of embolism above the native state level for species with long vessels. We concluded that open vessels were abnormally more vulnerable to cavitation than intact vessels. We recommend restricting this technique to species with short conduits. The relevance of our conclusions for other spinning techniques is discussed. © 2010 Blackwell Publishing Ltd.
Authors & Co-Authors
Cochard, Hervé
France, Clermont-ferrand
Physique et Physiologie Intégratives de L'arbre en Environnement Fluctuant Piaf
France, Clermont-ferrand
Université Clermont Auvergne
Herbette, Stéphane D.Sign©phane
France, Clermont-ferrand
Physique et Physiologie Intégratives de L'arbre en Environnement Fluctuant Piaf
France, Clermont-ferrand
Université Clermont Auvergne
Barigah, Têté Sévérien
France, Clermont-ferrand
Physique et Physiologie Intégratives de L'arbre en Environnement Fluctuant Piaf
France, Clermont-ferrand
Université Clermont Auvergne
Badel, Éric
France, Clermont-ferrand
Physique et Physiologie Intégratives de L'arbre en Environnement Fluctuant Piaf
France, Clermont-ferrand
Université Clermont Auvergne
Ennajeh, Mustapha
Tunisia, Gabes
Université de Gabès
Vilagrosa, Alberto
Spain, Alicante
Universitat D'alacant
Statistics
Citations: 144
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1111/j.1365-3040.2010.02163.x
ISSN:
01407791
Research Areas
Environmental