1. Ecophysiology and Plant Productivity Laboratory, Goiano Federal Institute of Science and Technology – Campus Rio Verde, P.O. Box 66, 75 901–970 Rio Verde GO Brazil
2. Centre for Carbon Water and Food, The University of Sydney, 380 Werombi road Camden 2570 NSW Australia
3. Stressed Plant Studies Laboratory, The University of São Paulo, Luiz de Queiroz College of Agriculture (ESALQ), P.O. Box 9, 13 418–900 Piracicaba SP Brazil