1. Institute of Botany Ulm University 89081 Ulm Albert‐Einstein‐Allee 11 Germany
2. Botanical Garden of Ulm University 89081 Ulm Hans‐Krebs‐Weg Germany
3. Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry Guangxi University 530004 Guangxi Nanning China
4. Laboratory of Plant Physiology ‘Coaracy M. Franco’, Center R&D in Ecophysiology and Biophysics Agronomic Institute (IAC) PO Box 28 Campinas 13012‐970 SP Brazil
5. Department of Plant Biology, Laboratory of Crop Physiology, Institute of Biology University of Campinas (UNICAMP) 13083‐970 SP Campinas PO Box 6109 Brazil
6. Department of Biological Science California State University Fullerton 800 N. State College Blvd Fullerton 92831‐3599 CA USA