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Photosystem II Subunit S overexpression increases the efficiency of water use in a field-grown crop

Author

Listed:
  • Katarzyna Głowacka

    (University of Illinois
    Polish Academy of Sciences)

  • Johannes Kromdijk

    (University of Illinois)

  • Katherine Kucera

    (University of Illinois)

  • Jiayang Xie

    (University of Illinois
    University of Illinois)

  • Amanda P. Cavanagh

    (University of Illinois)

  • Lauriebeth Leonelli

    (University of California Berkeley)

  • Andrew D. B. Leakey

    (University of Illinois
    University of Illinois
    University of Illinois)

  • Donald R. Ort

    (University of Illinois
    University of Illinois)

  • Krishna K. Niyogi

    (University of California Berkeley
    Lawrence Berkeley National Laboratory)

  • Stephen P. Long

    (University of Illinois
    University of Lancaster)

Abstract

Insufficient water availability for crop production is a mounting barrier to achieving the 70% increase in food production that will be needed by 2050. One solution is to develop crops that require less water per unit mass of production. Water vapor transpires from leaves through stomata, which also facilitate the influx of CO2 during photosynthetic assimilation. Here, we hypothesize that Photosystem II Subunit S (PsbS) expression affects a chloroplast-derived signal for stomatal opening in response to light, which can be used to improve water-use efficiency. Transgenic tobacco plants with a range of PsbS expression, from undetectable to 3.7 times wild-type are generated. Plants with increased PsbS expression show less stomatal opening in response to light, resulting in a 25% reduction in water loss per CO2 assimilated under field conditions. Since the role of PsbS is universal across higher plants, this manipulation should be effective across all crops.

Suggested Citation

  • Katarzyna Głowacka & Johannes Kromdijk & Katherine Kucera & Jiayang Xie & Amanda P. Cavanagh & Lauriebeth Leonelli & Andrew D. B. Leakey & Donald R. Ort & Krishna K. Niyogi & Stephen P. Long, 2018. "Photosystem II Subunit S overexpression increases the efficiency of water use in a field-grown crop," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03231-x
    DOI: 10.1038/s41467-018-03231-x
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