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

Katarzyna Głowacka, Johannes Kromdijk, Katherine Kucera, Jiayang Xie, Amanda P. Cavanagh, Lauriebeth Leonelli, Andrew Leakey, Donald Richard Ort, Krishna K. Niyogi, Stephen P Long

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Article number868
JournalNature communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018

Fingerprint

Photosystem II Protein Complex
crops
Crops
Water
water
chloroplasts
water loss
tobacco
assimilation
mounting
Light
leaves
availability
Tobacco
water vapor
manipulators
Genetically Modified Plants
Steam
Chloroplasts
Mountings

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Photosystem II Subunit S overexpression increases the efficiency of water use in a field-grown crop. / Głowacka, Katarzyna; Kromdijk, Johannes; Kucera, Katherine; Xie, Jiayang; Cavanagh, Amanda P.; Leonelli, Lauriebeth; Leakey, Andrew; Ort, Donald Richard; Niyogi, Krishna K.; Long, Stephen P.

In: Nature communications, Vol. 9, No. 1, 868, 01.12.2018.

Research output: Contribution to journalArticle

Głowacka, Katarzyna ; Kromdijk, Johannes ; Kucera, Katherine ; Xie, Jiayang ; Cavanagh, Amanda P. ; Leonelli, Lauriebeth ; Leakey, Andrew ; Ort, Donald Richard ; Niyogi, Krishna K. ; Long, Stephen P. / Photosystem II Subunit S overexpression increases the efficiency of water use in a field-grown crop. In: Nature communications. 2018 ; Vol. 9, No. 1.
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