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How light, temperature, and measurement and growth [CO2] interactively control isoprene emission in hybrid aspen.

Niinemets Ü, Sun Z - J. Exp. Bot. (2014)

Bottom Line: The data demonstrated strong interactive effects of environmental drivers and growth [CO2] on isoprene emissions.Light enhancement of isoprene emission was the greatest at intermediate temperatures and was greater in elevated-[CO2]-grown plants, indicating greater enhancement of the DMADP supply.In addition, [CO2] inhibition of isoprene emission was lost at a higher temperature with particularly strong effects in elevated-[CO2]-grown plants.

View Article: PubMed Central - PubMed

Affiliation: Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia ylo.niinemets@emu.ee.

No MeSH data available.


Temperature responses of isoprene emission rate in hybrid aspen leaves grown under ambient (380 μmol mol–1) and elevated (780 μmol mol–1) CO2 concentrations (reanalysis of the data of Sun et al., 2013). Isoprene emission rate was measured both at ambient and elevated [CO2] and at a moderately high light intensity of 500 μmol m–2 s–1 (a) and a strong light intensity of 2000 μmol m–2 s–1 (b). A(380) and E(380) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 380 μmol mol–1, while A(780) and E(780) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 780 μmol mol–1. Reported data are averages ± standard error (SE) of 8–10 replicate leaves for each combination of environmental drivers. The insets demonstrate the curves fitted to the data (Eq. 3).
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Figure 1: Temperature responses of isoprene emission rate in hybrid aspen leaves grown under ambient (380 μmol mol–1) and elevated (780 μmol mol–1) CO2 concentrations (reanalysis of the data of Sun et al., 2013). Isoprene emission rate was measured both at ambient and elevated [CO2] and at a moderately high light intensity of 500 μmol m–2 s–1 (a) and a strong light intensity of 2000 μmol m–2 s–1 (b). A(380) and E(380) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 380 μmol mol–1, while A(780) and E(780) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 780 μmol mol–1. Reported data are averages ± standard error (SE) of 8–10 replicate leaves for each combination of environmental drivers. The insets demonstrate the curves fitted to the data (Eq. 3).

Mentions: Increases in temperature enhanced the isoprene emission rate (I) up to 45–50 ºC (Fig. 1) with the optimum temperature of isoprene emission (Eq. 4) varying from 43 to 49 ºC across all the data (Table 1). Although the temperature responses were similar under the two light intensities of 500 and 2000 μmol m–2 s–1 (Fig. 1a, b), the light-dependent enhancement of I decreased with increasing temperature (Fig. 2). The light-dependent increase of isoprene emission rate (Eq. 1) did not depend on measurement [CO2] in ambient-[CO2]-grown plants, but in elevated-[CO2]-grown plants, the increase was greater at the higher measurement [CO2] of 780 μmol mol–1 than at 380 μmol mol–1 (Fig. 2).


How light, temperature, and measurement and growth [CO2] interactively control isoprene emission in hybrid aspen.

Niinemets Ü, Sun Z - J. Exp. Bot. (2014)

Temperature responses of isoprene emission rate in hybrid aspen leaves grown under ambient (380 μmol mol–1) and elevated (780 μmol mol–1) CO2 concentrations (reanalysis of the data of Sun et al., 2013). Isoprene emission rate was measured both at ambient and elevated [CO2] and at a moderately high light intensity of 500 μmol m–2 s–1 (a) and a strong light intensity of 2000 μmol m–2 s–1 (b). A(380) and E(380) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 380 μmol mol–1, while A(780) and E(780) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 780 μmol mol–1. Reported data are averages ± standard error (SE) of 8–10 replicate leaves for each combination of environmental drivers. The insets demonstrate the curves fitted to the data (Eq. 3).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
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Figure 1: Temperature responses of isoprene emission rate in hybrid aspen leaves grown under ambient (380 μmol mol–1) and elevated (780 μmol mol–1) CO2 concentrations (reanalysis of the data of Sun et al., 2013). Isoprene emission rate was measured both at ambient and elevated [CO2] and at a moderately high light intensity of 500 μmol m–2 s–1 (a) and a strong light intensity of 2000 μmol m–2 s–1 (b). A(380) and E(380) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 380 μmol mol–1, while A(780) and E(780) denote plants grown under ambient [CO2] of 380 μmol mol–1 and elevated [CO2] of 780 μmol mol–1, and both measured at [CO2] of 780 μmol mol–1. Reported data are averages ± standard error (SE) of 8–10 replicate leaves for each combination of environmental drivers. The insets demonstrate the curves fitted to the data (Eq. 3).
Mentions: Increases in temperature enhanced the isoprene emission rate (I) up to 45–50 ºC (Fig. 1) with the optimum temperature of isoprene emission (Eq. 4) varying from 43 to 49 ºC across all the data (Table 1). Although the temperature responses were similar under the two light intensities of 500 and 2000 μmol m–2 s–1 (Fig. 1a, b), the light-dependent enhancement of I decreased with increasing temperature (Fig. 2). The light-dependent increase of isoprene emission rate (Eq. 1) did not depend on measurement [CO2] in ambient-[CO2]-grown plants, but in elevated-[CO2]-grown plants, the increase was greater at the higher measurement [CO2] of 780 μmol mol–1 than at 380 μmol mol–1 (Fig. 2).

Bottom Line: The data demonstrated strong interactive effects of environmental drivers and growth [CO2] on isoprene emissions.Light enhancement of isoprene emission was the greatest at intermediate temperatures and was greater in elevated-[CO2]-grown plants, indicating greater enhancement of the DMADP supply.In addition, [CO2] inhibition of isoprene emission was lost at a higher temperature with particularly strong effects in elevated-[CO2]-grown plants.

View Article: PubMed Central - PubMed

Affiliation: Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia ylo.niinemets@emu.ee.

No MeSH data available.