Carbon isotope discrimination by Sorghum bicolor under CO2 enrichment and drought

  title={Carbon isotope discrimination by Sorghum bicolor under CO2 enrichment and drought},
  author={David G. Williams and V. L. Gempko and Alessandra Fravolini and Steven W. Leavitt and Gerard W. Wall and Bruce A. Kimball and Paul J. Pinter and Robert L. LaMorte and Michael J. Ottman},
  journal={New Phytologist},
Summary •  Sorghum bicolor was exposed to free-air CO2 enrichment (FACE) and drought at the Maricopa Agricultural Center, AZ, USA, in summer 1998. We predicted that bundle sheath leakiness (Φ) would be insensitive to FACE under well-irrigated (wet) conditions, but would be lower in FACE compared with control-CO2 treatments when irrigation was withheld (dry). •  Leaf and air δ13C values and leaf pi/pa from gas exchange were measured to estimate carbon isotope discrimination (Δ) and F. Midday… 

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