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Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials

Publication ,  Journal Article
Johnson, DM; Berry, ZC; Baker, KV; Smith, DD; McCulloh, KA; Domec, J
Published in: Functional ecology.
April 2018

Many plant species experience large differences in soil moisture availability within a season, potentially leading to a wide range of leaf water potentials (ΨLEAF). In order to decrease the risk of leaf dehydration, among species, there is a continuum ranging from strict control (isohydry) to little control (anisohydry) of minimum ΨLEAF. In central Texas USA, species are exposed to a range of soil moisture from wet springs to hot, dry summers. There are diverging water management strategies among the four dominant woody species in this system; two of these species are more isohydric (Prosopis glandulosa, Quercus fusiformis) while two others are more anisohydric (Diospyros texana, Juniperus asheii). To maintain leaf turgor and photosynthesis during periods of limited soil moisture, anisohydric species may adjust leaf hydraulic parameters more than isohydric species. To test this hypothesis, we quantified iso/anisohydry from 3 years of ΨLEAF predawn and midday measurements, and we measured the changes in turgor loss points (ΨTLP), osmotic potential at full hydration (Ψπ₁₀₀), and resistance to leaf hydraulic dysfunction (leaf P₅₀) throughout the spring and summer of 2016. Diospyros and Juniperus experienced more negative ΨLEAF and adjusted ΨTLP and Ψπ₁₀₀ in response to both drying soils during the summer also in response to rainfall events during September. In contrast, the more isohydric species (Quercus and Prosopis) did not appear to adjust ΨTLP or Ψπ₁₀₀ in response to soil moisture. The more anisohydric species also adjusted leaf P₅₀ during periods of reduced soil moisture. Our results suggest that species that experience wider ranges of ΨLEAF have a greater ability to alter leaf hydraulic properties. This provides insight on how species with different strategies for water potential regulation may modify properties to mitigate drought effects in the future. A plain language summary is available for this article.

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Published In

Functional ecology.

DOI

ISSN

0269-8463

Publication Date

April 2018

Volume

32

Issue

4

Start / End Page

894 / 903

Related Subject Headings

  • Ecology
  • 41 Environmental sciences
  • 31 Biological sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences
 

Citation

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Johnson, D. M., Berry, Z. C., Baker, K. V., Smith, D. D., McCulloh, K. A., & Domec, J. (2018). Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials. Functional Ecology., 32(4), 894–903. https://doi.org/10.1111/1365-2435.13049
Johnson, Daniel M., Z Carter Berry, Kathryn V. Baker, Duncan D. Smith, Katherine A. McCulloh, and Jean‐Christophe Domec. “Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials.” Functional Ecology. 32, no. 4 (April 2018): 894–903. https://doi.org/10.1111/1365-2435.13049.
Johnson DM, Berry ZC, Baker KV, Smith DD, McCulloh KA, Domec J. Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials. Functional ecology. 2018 Apr;32(4):894–903.
Johnson, Daniel M., et al. “Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials.” Functional Ecology., vol. 32, no. 4, Apr. 2018, pp. 894–903. Epmc, doi:10.1111/1365-2435.13049.
Johnson DM, Berry ZC, Baker KV, Smith DD, McCulloh KA, Domec J. Leaf hydraulic parameters are more plastic in species that experience a wider range of leaf water potentials. Functional ecology. 2018 Apr;32(4):894–903.
Journal cover image

Published In

Functional ecology.

DOI

ISSN

0269-8463

Publication Date

April 2018

Volume

32

Issue

4

Start / End Page

894 / 903

Related Subject Headings

  • Ecology
  • 41 Environmental sciences
  • 31 Biological sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences