Details:

Journal Title:
Plant, Cell & Environment
Personal Author:
Feng, Xue ; Ackerly, David D. ; Dawson, Todd E. ; Manzoni, Stefano ; McLaughlin, Blair ; ... More +
Feng, Xue ; Ackerly, David D. ; Dawson, Todd E. ; Manzoni, Stefano ; McLaughlin, Blair ; Skelton, Robert P. ; Vico, Giulia ; Weitz, Andrew P. ; Thompson, Sally E. Less -
NOAA Program & Office:
NOAA General Documents
Description:
Despite the appeal of the iso/anisohydric framework for classifying plant drought responses, recent studies have shown that such classifications can be strongly affected by a plant's environment. Here, we present measured in situ drought responses to demonstrate that apparent isohydricity can be conflated with environmental conditions that vary over space and time. In particular, we (a) use data from an oak species (Quercus douglasii) during the 2012–2015 extreme drought in California to demonstrate how temporal and spatial variability in the environment can influence plant water potential dynamics, masking the role of traits; (b) explain how these environmental variations might arise from climatic, topographic, and edaphic variability; (c) illustrate, through a “common garden” thought experiment, how existing trait‐based or response‐based isohydricity metrics can be confounded by these environmental variations, leading to Type‐1 (false positive) and Type‐2 (false negative) errors; and (d) advocate for the use of model‐based approaches for formulating alternate classification schemes. Building on recent insights from greenhouse and vineyard studies, we offer additional evidence across multiple field sites to demonstrate the importance of spatial and temporal drivers of plants' apparent isohydricity. This evidence challenges the use of isohydricity indices, per se, to characterize plant water relations at the global scale.
Keywords:
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Physiology Plant Science
Source:
Plant, Cell & Environment, 42(4), 1104-1111
DOI:
https://doi.org/10.1111/pce.13486
ISSN:
0140-7791;1365-3040;
Format:
PDF
Publisher:
Wiley
Document Type:
Journal Article
Rights Information:
Accepted Manuscript
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:41b322bf8ad7d75ca8e3567ead5dd05d22b55129bb763757a9b4b827962f677e
Download URL:
https://repository.library.noaa.gov/view/noaa/56928/noaa_56928_DS1.pdf
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