Effect of elevated CO2 concentration and vapour pressure deficit on isoprene emission from leaves of Populus deltoides during drought

Emiliano Pegoraro, Ana Rey, Edward G. Bobich, Greg A Barron-Gafford, Katherine Ann Grieve, Yadvinder Malhi, Ramesh Murthy

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

To further our understanding of the influence of global climate change on isoprene production we studied the effect of elevated [CO2] and vapour pressure deficit (VPD) on isoprene emission rates from leaves of Populus deltoides Bartr. during drought stress. Trees, grown inside three large bays with atmospheres containing 430, 800, or 1200 μmol mol-1 CO 2 at the Biosphere 2 facility, were subjected to a period of drought during which VPD was manipulated, switching between low VPD (approximately 1 kPa) and high VPD (approximately 3 kPa) for several days. When trees were not water-stressed, elevated [CO2] inhibited isoprene emission and stimulated photosynthesis. Isoprene emission was less responsive to drought than photosynthesis. As water-stress increased, the inhibition of isoprene emission disappeared, probably as a result of stomatal closure and the resulting decreases in intercellular [CO2] (Ci). This assumption was supported by increased isoprene emission under high VPD. Drought and high VPD dramatically increased the proportion of assimilated carbon lost as isoprene. When measured at the same [CO2], leaves from trees grown at ambient [CO2] always had higher isoprene emission rates than the leaves of trees grown at elevated [CO2], demonstrating that CO2 inhibition is a long-term effect.

Original languageEnglish (US)
Article numberFP04142
Pages (from-to)1137-1147
Number of pages11
JournalFunctional Plant Biology
Volume31
Issue number12
DOIs
StatePublished - 2004

Fingerprint

Populus deltoides
vapor pressure
drought
leaves
water stress
photosynthesis
isoprene
long term effects
climate change
carbon

Keywords

  • Biosphere 2 Laboratory
  • Carbon loss
  • Cottonwood
  • Elevated CO
  • Intercellular CO concentration
  • Isoprene production
  • Photosynthesis
  • Populus deltoides
  • Stomatal conductance
  • Water-stress

ASJC Scopus subject areas

  • Plant Science

Cite this

Effect of elevated CO2 concentration and vapour pressure deficit on isoprene emission from leaves of Populus deltoides during drought. / Pegoraro, Emiliano; Rey, Ana; Bobich, Edward G.; Barron-Gafford, Greg A; Grieve, Katherine Ann; Malhi, Yadvinder; Murthy, Ramesh.

In: Functional Plant Biology, Vol. 31, No. 12, FP04142, 2004, p. 1137-1147.

Research output: Contribution to journalArticle

Pegoraro, Emiliano ; Rey, Ana ; Bobich, Edward G. ; Barron-Gafford, Greg A ; Grieve, Katherine Ann ; Malhi, Yadvinder ; Murthy, Ramesh. / Effect of elevated CO2 concentration and vapour pressure deficit on isoprene emission from leaves of Populus deltoides during drought. In: Functional Plant Biology. 2004 ; Vol. 31, No. 12. pp. 1137-1147.
@article{45f64bf938474a32b8458e5af1b50d0e,
title = "Effect of elevated CO2 concentration and vapour pressure deficit on isoprene emission from leaves of Populus deltoides during drought",
abstract = "To further our understanding of the influence of global climate change on isoprene production we studied the effect of elevated [CO2] and vapour pressure deficit (VPD) on isoprene emission rates from leaves of Populus deltoides Bartr. during drought stress. Trees, grown inside three large bays with atmospheres containing 430, 800, or 1200 μmol mol-1 CO 2 at the Biosphere 2 facility, were subjected to a period of drought during which VPD was manipulated, switching between low VPD (approximately 1 kPa) and high VPD (approximately 3 kPa) for several days. When trees were not water-stressed, elevated [CO2] inhibited isoprene emission and stimulated photosynthesis. Isoprene emission was less responsive to drought than photosynthesis. As water-stress increased, the inhibition of isoprene emission disappeared, probably as a result of stomatal closure and the resulting decreases in intercellular [CO2] (Ci). This assumption was supported by increased isoprene emission under high VPD. Drought and high VPD dramatically increased the proportion of assimilated carbon lost as isoprene. When measured at the same [CO2], leaves from trees grown at ambient [CO2] always had higher isoprene emission rates than the leaves of trees grown at elevated [CO2], demonstrating that CO2 inhibition is a long-term effect.",
keywords = "Biosphere 2 Laboratory, Carbon loss, Cottonwood, Elevated CO, Intercellular CO concentration, Isoprene production, Photosynthesis, Populus deltoides, Stomatal conductance, Water-stress",
author = "Emiliano Pegoraro and Ana Rey and Bobich, {Edward G.} and Barron-Gafford, {Greg A} and Grieve, {Katherine Ann} and Yadvinder Malhi and Ramesh Murthy",
year = "2004",
doi = "10.1071/FP04142",
language = "English (US)",
volume = "31",
pages = "1137--1147",
journal = "Functional Plant Biology",
issn = "1445-4408",
publisher = "CSIRO",
number = "12",

}

TY - JOUR

T1 - Effect of elevated CO2 concentration and vapour pressure deficit on isoprene emission from leaves of Populus deltoides during drought

AU - Pegoraro, Emiliano

AU - Rey, Ana

AU - Bobich, Edward G.

AU - Barron-Gafford, Greg A

AU - Grieve, Katherine Ann

AU - Malhi, Yadvinder

AU - Murthy, Ramesh

PY - 2004

Y1 - 2004

N2 - To further our understanding of the influence of global climate change on isoprene production we studied the effect of elevated [CO2] and vapour pressure deficit (VPD) on isoprene emission rates from leaves of Populus deltoides Bartr. during drought stress. Trees, grown inside three large bays with atmospheres containing 430, 800, or 1200 μmol mol-1 CO 2 at the Biosphere 2 facility, were subjected to a period of drought during which VPD was manipulated, switching between low VPD (approximately 1 kPa) and high VPD (approximately 3 kPa) for several days. When trees were not water-stressed, elevated [CO2] inhibited isoprene emission and stimulated photosynthesis. Isoprene emission was less responsive to drought than photosynthesis. As water-stress increased, the inhibition of isoprene emission disappeared, probably as a result of stomatal closure and the resulting decreases in intercellular [CO2] (Ci). This assumption was supported by increased isoprene emission under high VPD. Drought and high VPD dramatically increased the proportion of assimilated carbon lost as isoprene. When measured at the same [CO2], leaves from trees grown at ambient [CO2] always had higher isoprene emission rates than the leaves of trees grown at elevated [CO2], demonstrating that CO2 inhibition is a long-term effect.

AB - To further our understanding of the influence of global climate change on isoprene production we studied the effect of elevated [CO2] and vapour pressure deficit (VPD) on isoprene emission rates from leaves of Populus deltoides Bartr. during drought stress. Trees, grown inside three large bays with atmospheres containing 430, 800, or 1200 μmol mol-1 CO 2 at the Biosphere 2 facility, were subjected to a period of drought during which VPD was manipulated, switching between low VPD (approximately 1 kPa) and high VPD (approximately 3 kPa) for several days. When trees were not water-stressed, elevated [CO2] inhibited isoprene emission and stimulated photosynthesis. Isoprene emission was less responsive to drought than photosynthesis. As water-stress increased, the inhibition of isoprene emission disappeared, probably as a result of stomatal closure and the resulting decreases in intercellular [CO2] (Ci). This assumption was supported by increased isoprene emission under high VPD. Drought and high VPD dramatically increased the proportion of assimilated carbon lost as isoprene. When measured at the same [CO2], leaves from trees grown at ambient [CO2] always had higher isoprene emission rates than the leaves of trees grown at elevated [CO2], demonstrating that CO2 inhibition is a long-term effect.

KW - Biosphere 2 Laboratory

KW - Carbon loss

KW - Cottonwood

KW - Elevated CO

KW - Intercellular CO concentration

KW - Isoprene production

KW - Photosynthesis

KW - Populus deltoides

KW - Stomatal conductance

KW - Water-stress

UR - http://www.scopus.com/inward/record.url?scp=11244261712&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11244261712&partnerID=8YFLogxK

U2 - 10.1071/FP04142

DO - 10.1071/FP04142

M3 - Article

AN - SCOPUS:11244261712

VL - 31

SP - 1137

EP - 1147

JO - Functional Plant Biology

JF - Functional Plant Biology

SN - 1445-4408

IS - 12

M1 - FP04142

ER -