Interactive effects of water limitation and elevated temperature on the physiology, development and fitness of diverse accessions of Brachypodium distachyon

David L. Des Marais, Jesse R. Lasky, Paul E. Verslues, Trent Z. Chang, Thomas E. Juenger

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An enduring question in plant physiology and evolution is how single genotypes of plants optimize performance in diverse, often highly variable, environments. We grew 35 natural accessions of the grass Brachypodium distachyon in four environments in the glasshouse, contrasting soil water deficit, elevated temperature and their interaction. We modeled treatment, genotype and interactive effects on leaf-level and whole-plant traits, including fecundity. We also assessed the relationship between glasshouse-measured traits and parameters related to climate at the place of origin. We found abundant genetic variation in both constitutive and induced traits related to plant–water relations. Most traits showed strong interaction between temperature and water availability, and we observed genotype-by-environment interaction for several traits. Notably, leaf free proline abundance showed a strong effect of genotype × temperature × water. We found strong associations between phenology, biomass and water use efficiency (WUE) with parameters describing climate of origin. Plants respond to multiple stressors in ways not directly predictable from single stressors, underscoring the complex and trait-specific mechanisms of environmental response. Climate–trait correlations support a role for WUE and phenology in local adaptation to climate in B. distachyon.

Original languageEnglish (US)
Pages (from-to)132-144
Number of pages13
JournalNew Phytologist
Volume214
Issue number1
DOIs
StatePublished - Apr 1 2017

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Brachypodium
Brachypodium distachyon
physiology
Climate
climate
Temperature
water use efficiency
phenology
Water
genotype
Genotype
greenhouses
soil water deficit
temperature
water
plant physiology
Plant Physiological Phenomena
proline
leaves
fecundity

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Des Marais, David L. ; Lasky, Jesse R. ; Verslues, Paul E. ; Chang, Trent Z. ; Juenger, Thomas E. / Interactive effects of water limitation and elevated temperature on the physiology, development and fitness of diverse accessions of Brachypodium distachyon. In: New Phytologist. 2017 ; Vol. 214, No. 1. pp. 132-144.
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Interactive effects of water limitation and elevated temperature on the physiology, development and fitness of diverse accessions of Brachypodium distachyon. / Des Marais, David L.; Lasky, Jesse R.; Verslues, Paul E.; Chang, Trent Z.; Juenger, Thomas E.

In: New Phytologist, Vol. 214, No. 1, 01.04.2017, p. 132-144.

Research output: Contribution to journalArticle

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