Polar Desert Adaptations of a High Arctic Plant Species

Plants of Saxifraga oppositifolia (Saxifragaceae) possess metabolic adaptations that allow them to grow successfully in polar desert microenvironments. Net photosynthesis (net carbon uptake) continues to be positive during drought until the leaf water stress declines to the range of -21 to -29 bars,...

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Bibliographic Details
Published in:Science
Main Author: Teeri, J. A.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1973
Subjects:
Arctic
polar desert
Saxifraga oppositifolia
Online Access:http://dx.doi.org/10.1126/science.179.4072.496
https://www.science.org/doi/pdf/10.1126/science.179.4072.496
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Summary:Plants of Saxifraga oppositifolia (Saxifragaceae) possess metabolic adaptations that allow them to grow successfully in polar desert microenvironments. Net photosynthesis (net carbon uptake) continues to be positive during drought until the leaf water stress declines to the range of -21 to -29 bars, which is considerably below the nonstress range of 0 to -10 bars. The plants can survive leaf water stresses of at least -44 bars in the field and leaf water stresses of -55 bars in a growth chamber.

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