Leaf water O and H maps show directional enrichment discrepancy in Colocasia esculenta Running title : Mapping leaf water isotopes in C . esculenta

Dept. of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, USA Dept. of Geosciences, Princeton University, Princeton, NJ 08544, USA Dept. of Biology, University of New Mexico, Albuquerque, NM 87131, USA Dept. of Geological, Environmental, and Marine Sciences, Rider University, Lawrenceville, NJ 08648, USA EarthRes Group, Inc., Pipersville, PA 18947, USA Dept. of Geography, UC Santa Barbara, Santa Barbara, CA 93106, USA Bren School of Environmental Science and Management, UC Santa Barbara, Santa Barbara, CA 93106, USA