Hierarchical statistical modeling of xylem vulnerability to cavitation
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چکیده
منابع مشابه
Hierarchical statistical modeling of xylem vulnerability to cavitation.
Cavitation of xylem elements diminishes the water transport capacity of plants, and quantifying xylem vulnerability to cavitation is important to understanding plant function. Current approaches to analyzing hydraulic conductivity (K) data to infer vulnerability to cavitation suffer from problems such as the use of potentially unrealistic vulnerability curves, difficulty interpreting parameters...
متن کاملVulnerability of Xylem to Cavitation and Embolism
WATER RELATIONS AND THE VULNERABLE PIPELINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 EARLY EFFORTS TO DETECT CAVITATION AND EMBOLISM . . . . . . . . . . . . . . . . . . . . . 21 ACOUSTIC DETECTION OF CAVITATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Audio (Low-Frequency) Detection . . . . . . . . . . . . . . . ....
متن کاملCalcium is a major determinant of xylem vulnerability to cavitation.
Xylem vulnerability to cavitation is a key parameter in the drought tolerance of trees, but little is known about the control mechanisms involved. Cavitation is thought to occur when an air bubble penetrates through a pit wall, and would hence be influenced by the wall's porosity. We first tested the role of wall-bound calcium in vulnerability to cavitation in Fagus sylvatica. Stems perfused wi...
متن کاملA mathematical and statistical analysis of the curves illustrating vulnerability of xylem to cavitation.
When vulnerability curves are used to assess the susceptibility of plants to drought, the water potential corresponding to 50% loss of conductivity is frequently used as a measure of susceptibility. However, this value does not distinguish between different patterns of conductivity loss, such as a rapid loss over a narrow water potential range versus a gradual decline in conductivity. We have a...
متن کاملVulnerability of xylem vessels to cavitation in sugar maple. Scaling from individual vessels to whole branches.
The relation between xylem vessel age and vulnerability to cavitation of sugar maple (Acer saccharum Marsh.) was quantified by measuring the pressure required to force air across bordered pit membranes separating individual xylem vessels. We found that the bordered pit membranes of vessels located in current year xylem could withstand greater applied gas pressures (3.8 MPa) compared with border...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 2009
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.2008.02760.x