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Stem radial growth and water storage responses to heat and drought vary between conifers with differing hydraulic strategies: Semiarid conifers responses to drought and heat

Journal Article · · Plant, Cell and Environment
DOI:https://doi.org/10.1111/pce.13340· OSTI ID:1479960
 [1];  [2];  [3];  [2];  [2];  [4];  [1];  [5]
  1. Univ. of Alicante, Alicante (Spain). IMEM "Ramon Margalef, Dept. of Ecology
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Oklahoma State Univ., Stillwater, OK (United States). Dept. of Plant Biology, Ecology, and Evolution
  4. Univ. Laica "Eloy Alfaro" de Manabí (Ecuador). Facultad de Ciencias Agropecuarias
  5. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
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Here, we investigated stem radial growth and water storage dynamics of 2 conifer species differing in hydraulic carbon strategies, Juniperus monosperma and Pinus edulis, under conditions of ambient, drought (~45% reduction in precipitation), heat (~4.8 °C temperature increase), and the combination of drought + heat, in 2013 and 2014. Juniper maintained low growth across all treatments. Overall, the relatively isohydric piñon pine showed significantly greater growth and water storage recharge than the relatively anisohydric juniper across all treatments in the average climate year (2014) but no differences in the regionally dry year (2013). Piñon pine ceased growth at a constant predawn water potential across all treatments and at a less negative water potential threshold than juniper. Heat has a greater negative impact on piñon pines' growth and water storage than drought, whereas juniper was, in contrast, unaffected by heat but strongly impacted by drought. The whole-plant hydraulic carbon strategies, in this case captured using the isohydric/anisohydric concept, translate into alternative growth and water storage strategies under drought and heat conditions.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC). Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1479960
Report Number(s):
LA-UR--18-24643
Journal Information:
Plant, Cell and Environment, Journal Name: Plant, Cell and Environment Journal Issue: 8 Vol. 41; ISSN 0140-7791
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Coordination and trade‐offs between leaf and stem hydraulic traits and stomatal regulation along a spectrum of isohydry to anisohydry journal March 2019

Figures / Tables (10)

Fig 1(p. 28)figure Fig 1
Fig 2(p. 29)figure Fig 2
Fig 3(p. 30)figure Fig 3
Fig 4(p. 31)figure Fig 4
Fig 5(p. 32)figure Fig 5
Figure S1(p. 33)figure Figure S1
Figure S2(p. 34)figure Figure S2
Figure S3(p. 35)figure Figure S3
Table S1(p. 37)table Table S1
Table S2(p. 38)table Table S2

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Related Subjects

54 ENVIRONMENTAL SCIENCES
Biological Science
Earth Sciences
Increased temperature
Juniperus monosperma
LVDT
Pinus edulis
growth
water potential