Variation in; MPK12; affects water use efficiency in; Arabidopsis; and reveals a pleiotropic link between guard cell size and ABA response Journal Article uri icon



  • Significance; ; Water is essential for nearly all aspects of plant biology though, for many plants, water is a limited resource. Water use efficiency measures the ratio of photosynthetic carbon fixation to water lost via leaf transpiration and is a critical determinant of plant productivity in field environments. We identify a molecular variant that drives variation in water use efficiency between two natural genotypes of; Arabidopsis thaliana; . We show that two alleles, distinguished by a single substitution in a signaling protein, cause whole-plant differences in plant water relations via inducible and constitutive mechanisms. Furthermore, we show that the alleles respond differently to environmental cues, demonstrating the molecular basis of a gene-by-environment interaction in a trait of interest to plant breeders and ecologists.;

publication date

  • February 18, 2014

has restriction

  • green

Date in CU Experts

  • January 27, 2017 11:10 AM

Full Author List

  • Des Marais DL; Auchincloss LC; Sukamtoh E; McKay JK; Logan T; Richards JH; Juenger TE

author count

  • 7

Other Profiles

International Standard Serial Number (ISSN)

  • 0027-8424

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

Additional Document Info

start page

  • 2836

end page

  • 2841


  • 111


  • 7