Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line

H. F. Zheng, L. F. Xin, J. M. Guo, J. Mao, X. P. Han, L. Jia, B. Y. Zheng, Chunguang Du, R. W. Elmore, Q. H. Yang, R. X. Shao

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50% of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA − that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD.

Original languageEnglish
Pages (from-to)399-408
Number of pages10
JournalPhotosynthetica
Volume57
Issue number2
DOIs
StatePublished - 1 Jan 2019

Fingerprint

Photosynthesis
Dehydration
inbred lines
Zea mays
photosynthesis
corn
Water
Electron Transport
water
Photochemistry
Inflorescence
electron transfer
water stress
Photons
Fluorescence
Gases
photochemistry
Electrons
Light
antennae

Keywords

  • Biomass
  • OJIP transients
  • Photosynthetic capacity
  • Tassel emergence
  • Withholding water

Cite this

Zheng, H. F., Xin, L. F., Guo, J. M., Mao, J., Han, X. P., Jia, L., ... Shao, R. X. (2019). Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line. Photosynthetica, 57(2), 399-408. https://doi.org/10.32615/ps.2019.047
Zheng, H. F. ; Xin, L. F. ; Guo, J. M. ; Mao, J. ; Han, X. P. ; Jia, L. ; Zheng, B. Y. ; Du, Chunguang ; Elmore, R. W. ; Yang, Q. H. ; Shao, R. X. / Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line. In: Photosynthetica. 2019 ; Vol. 57, No. 2. pp. 399-408.
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abstract = "Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50{\%} of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA − that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD.",
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Zheng, HF, Xin, LF, Guo, JM, Mao, J, Han, XP, Jia, L, Zheng, BY, Du, C, Elmore, RW, Yang, QH & Shao, RX 2019, 'Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line', Photosynthetica, vol. 57, no. 2, pp. 399-408. https://doi.org/10.32615/ps.2019.047

Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line. / Zheng, H. F.; Xin, L. F.; Guo, J. M.; Mao, J.; Han, X. P.; Jia, L.; Zheng, B. Y.; Du, Chunguang; Elmore, R. W.; Yang, Q. H.; Shao, R. X.

In: Photosynthetica, Vol. 57, No. 2, 01.01.2019, p. 399-408.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Adaptation of photosynthesis to water deficit in the reproductive phase of a maize (Zea mays L.) inbred line

AU - Zheng, H. F.

AU - Xin, L. F.

AU - Guo, J. M.

AU - Mao, J.

AU - Han, X. P.

AU - Jia, L.

AU - Zheng, B. Y.

AU - Du, Chunguang

AU - Elmore, R. W.

AU - Yang, Q. H.

AU - Shao, R. X.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50% of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA − that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD.

AB - Photosynthesis is sensitive to water deficit (WD) stress. Maize (Zea mays L.) yield is vulnerable to water stress, especially if it occurs during the reproductive stage. In this study, the expression patterns of photosynthesis-related genes, together with photosynthetic gas-exchange and fluorescence parameters were investigated in a maize inbred line exposed to 50% of field water capacity (moderate WD) for 15 d after tassel emergence. The results demonstrated that WD down-regulated expression of psbA, psbB, psbC, psbP, psaA, psaB, and cab, especially at later periods of WD stress. Besides, with the increased WD stress, the steady decline in the value of photosynthesis performance index, maximum quantum yield of primary photochemistry, quantum yield for electron transport, quantum yield for the reduction of end acceptors of PSI per photon absorbed, and the efficiency of an electron beyond QA − that reduced PSI acceptors, and a clear increase in the J-step and I-step, K-band as well as L-band were observed. The results suggested that WD might restrict light-harvesting and electron transport. Interestingly, leaf transcript levels of rbcL and rbcS were up-regulated at the later stage of water stress in maize inbred line, which helped repair injury to PSII centers and maintain PSII activity (increased quantum yield of dissipation and effective antenna size of an active reaction center) under 15-d lasting WD.

KW - Biomass

KW - OJIP transients

KW - Photosynthetic capacity

KW - Tassel emergence

KW - Withholding water

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