Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species (2024)

Crous, K. Y., Drake, J. E., Aspinwall, M. J., Sharwood, R. E., Tjoelker, M. G., & Ghannoum, O. (2018). Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species. Global Change Biology, 24(10), 4626-4644. https://doi.org/10.1111/gcb.14330

Crous, Kristine Y. ; Drake, John E. ; Aspinwall, Michael J. et al. / Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species. In: Global Change Biology. 2018 ; Vol. 24, No. 10. pp. 4626-4644.

@article{e602d094f33349ff98800af0c87066d1,

title = "Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species",

abstract = "Climate is an important factor limiting tree distributions and adaptation to different thermal environments may influence how tree populations respond to climate warming. Given the current rate of warming, it has been hypothesized that tree populations in warmer, more thermally stable climates may have limited capacity to respond physiologically to warming compared to populations from cooler, more seasonal climates. We determined in a controlled environment how several provenances of widely distributed Eucalyptus tereticornis and E.grandis adjusted their photosynthetic capacity to +3.5°C warming along their native distribution range (~16–38°S) and whether climate of seed origin of the provenances influenced their response to different growth temperatures. We also tested how temperature optima (Topt) of photosynthesis and Jmax responded to higher growth temperatures. Our results showed increased photosynthesis rates at a standardized temperature with warming in temperate provenances, while rates in tropical provenances were reduced by about 40% compared to their temperate counterparts. Temperature optima of photosynthesis increased as provenances were exposed to warmer growth temperatures. Both species had ~30% reduced photosynthetic capacity in tropical and subtropical provenances related to reduced leaf nitrogen and leaf Rubisco content compared to temperate provenances. Tropical provenances operated closer to their thermal optimum and came within 3% of the Topt of Jmax during the daily temperature maxima. Hence, further warming may negatively affect C uptake and tree growth in warmer climates, whereas eucalypts in cooler climates may benefit from moderate warming.",

keywords = "J, R/A ratio, V, growth temperature, leaf respiration, optimum temperature, photosynthesis, thermal acclimation, warming",

author = "Crous, {Kristine Y.} and Drake, {John E.} and Aspinwall, {Michael J.} and Sharwood, {Robert E.} and Tjoelker, {Mark G.} and Oula Ghannoum",

note = "Publisher Copyright: {\textcopyright} 2018 John Wiley & Sons Ltd",

year = "2018",

month = oct,

doi = "10.1111/gcb.14330",

language = "English",

volume = "24",

pages = "4626--4644",

journal = "Global Change Biology",

issn = "1354-1013",

publisher = "Wiley-Blackwell Publishing Ltd",

number = "10",

}

Crous, KY, Drake, JE, Aspinwall, MJ, Sharwood, RE, Tjoelker, MG & Ghannoum, O 2018, 'Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species', Global Change Biology, vol. 24, no. 10, pp. 4626-4644. https://doi.org/10.1111/gcb.14330

Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species. / Crous, Kristine Y.; Drake, John E.; Aspinwall, Michael J. et al.
In: Global Change Biology, Vol. 24, No. 10, 10.2018, p. 4626-4644.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species

AU - Crous, Kristine Y.

AU - Drake, John E.

AU - Aspinwall, Michael J.

AU - Sharwood, Robert E.

AU - Tjoelker, Mark G.

AU - Ghannoum, Oula

N1 - Publisher Copyright:© 2018 John Wiley & Sons Ltd

PY - 2018/10

Y1 - 2018/10

N2 - Climate is an important factor limiting tree distributions and adaptation to different thermal environments may influence how tree populations respond to climate warming. Given the current rate of warming, it has been hypothesized that tree populations in warmer, more thermally stable climates may have limited capacity to respond physiologically to warming compared to populations from cooler, more seasonal climates. We determined in a controlled environment how several provenances of widely distributed Eucalyptus tereticornis and E.grandis adjusted their photosynthetic capacity to +3.5°C warming along their native distribution range (~16–38°S) and whether climate of seed origin of the provenances influenced their response to different growth temperatures. We also tested how temperature optima (Topt) of photosynthesis and Jmax responded to higher growth temperatures. Our results showed increased photosynthesis rates at a standardized temperature with warming in temperate provenances, while rates in tropical provenances were reduced by about 40% compared to their temperate counterparts. Temperature optima of photosynthesis increased as provenances were exposed to warmer growth temperatures. Both species had ~30% reduced photosynthetic capacity in tropical and subtropical provenances related to reduced leaf nitrogen and leaf Rubisco content compared to temperate provenances. Tropical provenances operated closer to their thermal optimum and came within 3% of the Topt of Jmax during the daily temperature maxima. Hence, further warming may negatively affect C uptake and tree growth in warmer climates, whereas eucalypts in cooler climates may benefit from moderate warming.

AB - Climate is an important factor limiting tree distributions and adaptation to different thermal environments may influence how tree populations respond to climate warming. Given the current rate of warming, it has been hypothesized that tree populations in warmer, more thermally stable climates may have limited capacity to respond physiologically to warming compared to populations from cooler, more seasonal climates. We determined in a controlled environment how several provenances of widely distributed Eucalyptus tereticornis and E.grandis adjusted their photosynthetic capacity to +3.5°C warming along their native distribution range (~16–38°S) and whether climate of seed origin of the provenances influenced their response to different growth temperatures. We also tested how temperature optima (Topt) of photosynthesis and Jmax responded to higher growth temperatures. Our results showed increased photosynthesis rates at a standardized temperature with warming in temperate provenances, while rates in tropical provenances were reduced by about 40% compared to their temperate counterparts. Temperature optima of photosynthesis increased as provenances were exposed to warmer growth temperatures. Both species had ~30% reduced photosynthetic capacity in tropical and subtropical provenances related to reduced leaf nitrogen and leaf Rubisco content compared to temperate provenances. Tropical provenances operated closer to their thermal optimum and came within 3% of the Topt of Jmax during the daily temperature maxima. Hence, further warming may negatively affect C uptake and tree growth in warmer climates, whereas eucalypts in cooler climates may benefit from moderate warming.

KW - J

KW - R/A ratio

KW - V

KW - growth temperature

KW - leaf respiration

KW - optimum temperature

KW - photosynthesis

KW - thermal acclimation

KW - warming

UR - http://www.scopus.com/inward/record.url?scp=85053909371&partnerID=8YFLogxK

U2 - 10.1111/gcb.14330

DO - 10.1111/gcb.14330

M3 - Article

SN - 1354-1013

VL - 24

SP - 4626

EP - 4644

JO - Global Change Biology

JF - Global Change Biology

IS - 10

ER -

Crous KY, Drake JE, Aspinwall MJ, Sharwood RE, Tjoelker MG, Ghannoum O. Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species. Global Change Biology. 2018 Oct;24(10):4626-4644. doi: 10.1111/gcb.14330