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Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles

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Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles. / Wang, Yu; Stutz, Samantha S.; Bernacchi, Carl J. et al.
In: New Phytologist, Vol. 236, No. 5, 31.12.2022, p. 1661-1675.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Wang, Y, Stutz, SS, Bernacchi, CJ, Boyd, RA, Ort, DR & Long, SP 2022, 'Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles', New Phytologist, vol. 236, no. 5, pp. 1661-1675. https://doi.org/10.1111/nph.18485

APA

Wang, Y., Stutz, S. S., Bernacchi, C. J., Boyd, R. A., Ort, D. R., & Long, S. P. (2022). Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles. New Phytologist, 236(5), 1661-1675. https://doi.org/10.1111/nph.18485

Vancouver

Wang Y, Stutz SS, Bernacchi CJ, Boyd RA, Ort DR, Long SP. Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles. New Phytologist. 2022 Dec 31;236(5):1661-1675. doi: 10.1111/nph.18485

Author

Wang, Yu ; Stutz, Samantha S. ; Bernacchi, Carl J. et al. / Increased bundle sheath leakiness of <scp> CO <sub>2</sub> </scp> during photosynthetic induction shows a lack of coordination between the <scp> C <sub>4</sub> </scp> and <scp> C <sub>3</sub> </scp> cycles. In: New Phytologist. 2022 ; Vol. 236, No. 5. pp. 1661-1675.

Bibtex

@article{9bae773af1ee4866ad2049a2bffb2197,
title = "Increased bundle sheath leakiness of CO 2 during photosynthetic induction shows a lack of coordination between the C 4 and C 3 cycles",
abstract = "Use of a complete dynamic model of NADP-malic enzyme C 4 photosynthesis indicated that, during transitions from dark or shade to high light, induction of the C 4 pathway was more rapid than that of C 3 , resulting in a predicted transient increase in bundle-sheath CO 2 leakiness (ϕ). Previously, ϕ has been measured at steady state; here we developed a new method, coupling a tunable diode laser absorption spectroscope with a gas-exchange system to track ϕ in sorghum and maize through the nonsteady-state condition of photosynthetic induction. In both species, ϕ showed a transient increase to > 0.35 before declining to a steady state of 0.2 by 1500 s after illumination. Average ϕ was 60% higher than at steady state over the first 600 s of induction and 30% higher over the first 1500 s. The transient increase in ϕ, which was consistent with model prediction, indicated that capacity to assimilate CO 2 into the C 3 cycle in the bundle sheath failed to keep pace with the rate of dicarboxylate delivery by the C 4 cycle. Because nonsteady-state light conditions are the norm in field canopies, the results suggest that ϕ in these major crops in the field is significantly higher and energy conversion efficiency lower than previous measured values under steady-state conditions. ",
keywords = "bundle-sheath leakage, C4 photosynthesis, carbon isotope discrimination, maize, sorghum, photosynthetic efficiency, photosynthetic induction, tunable diode laser absorption spectroscopy",
author = "Yu Wang and Stutz, {Samantha S.} and Bernacchi, {Carl J.} and Boyd, {Ryan A.} and Ort, {Donald R.} and Long, {Stephen P.}",
year = "2022",
month = dec,
day = "31",
doi = "10.1111/nph.18485",
language = "English",
volume = "236",
pages = "1661--1675",
journal = "New Phytologist",
issn = "0028-646X",
publisher = "Wiley",
number = "5",

}

RIS

TY - JOUR

T1 - Increased bundle sheath leakiness of CO 2 during photosynthetic induction shows a lack of coordination between the C 4 and C 3 cycles

AU - Wang, Yu

AU - Stutz, Samantha S.

AU - Bernacchi, Carl J.

AU - Boyd, Ryan A.

AU - Ort, Donald R.

AU - Long, Stephen P.

PY - 2022/12/31

Y1 - 2022/12/31

N2 - Use of a complete dynamic model of NADP-malic enzyme C 4 photosynthesis indicated that, during transitions from dark or shade to high light, induction of the C 4 pathway was more rapid than that of C 3 , resulting in a predicted transient increase in bundle-sheath CO 2 leakiness (ϕ). Previously, ϕ has been measured at steady state; here we developed a new method, coupling a tunable diode laser absorption spectroscope with a gas-exchange system to track ϕ in sorghum and maize through the nonsteady-state condition of photosynthetic induction. In both species, ϕ showed a transient increase to > 0.35 before declining to a steady state of 0.2 by 1500 s after illumination. Average ϕ was 60% higher than at steady state over the first 600 s of induction and 30% higher over the first 1500 s. The transient increase in ϕ, which was consistent with model prediction, indicated that capacity to assimilate CO 2 into the C 3 cycle in the bundle sheath failed to keep pace with the rate of dicarboxylate delivery by the C 4 cycle. Because nonsteady-state light conditions are the norm in field canopies, the results suggest that ϕ in these major crops in the field is significantly higher and energy conversion efficiency lower than previous measured values under steady-state conditions.

AB - Use of a complete dynamic model of NADP-malic enzyme C 4 photosynthesis indicated that, during transitions from dark or shade to high light, induction of the C 4 pathway was more rapid than that of C 3 , resulting in a predicted transient increase in bundle-sheath CO 2 leakiness (ϕ). Previously, ϕ has been measured at steady state; here we developed a new method, coupling a tunable diode laser absorption spectroscope with a gas-exchange system to track ϕ in sorghum and maize through the nonsteady-state condition of photosynthetic induction. In both species, ϕ showed a transient increase to > 0.35 before declining to a steady state of 0.2 by 1500 s after illumination. Average ϕ was 60% higher than at steady state over the first 600 s of induction and 30% higher over the first 1500 s. The transient increase in ϕ, which was consistent with model prediction, indicated that capacity to assimilate CO 2 into the C 3 cycle in the bundle sheath failed to keep pace with the rate of dicarboxylate delivery by the C 4 cycle. Because nonsteady-state light conditions are the norm in field canopies, the results suggest that ϕ in these major crops in the field is significantly higher and energy conversion efficiency lower than previous measured values under steady-state conditions.

KW - bundle-sheath leakage

KW - C4 photosynthesis

KW - carbon isotope discrimination

KW - maize

KW - sorghum

KW - photosynthetic efficiency

KW - photosynthetic induction

KW - tunable diode laser absorption spectroscopy

U2 - 10.1111/nph.18485

DO - 10.1111/nph.18485

M3 - Journal article

C2 - 36098668

VL - 236

SP - 1661

EP - 1675

JO - New Phytologist

JF - New Phytologist

SN - 0028-646X

IS - 5

ER -