1. Embrapa Agroenergy; Brasília DF 70770901 Brazil
2. Plant Sciences; Rothamsted Research; Harpenden, Hertfordshire AL5 2JQ UK
3. Department of Biochemistry; State University of Maringá; Maringá, Paraná 87020-900 Brazil
4. Brazilian Bioethanol Science and Technology Laboratory; Brazilian Center for Research in Energy and Materials; Campinas, Sao Paulo 13083-100 Brazil
5. Programa de Processos Tecnológicos e Ambientais; Universidade de Sorocaba (UNISO); Sorocaba 18060-000 Brazil
6. Centre of Natural Sciences and Humanities; Federal University of ABC; São Bernardo do Campo SP 09606-045 Brazil
7. Department of Plant Physiology and Biochemistry; Institute of Botany; Sao Paulo 04301-012, 04301-902 Brazil
8. Department of Biochemistry; University of Wisconsin; Madison WI 537 USA
9. Department of Energy's Great Lakes Bioenergy Research Center; Wisconsin Energy Institute; University of Wisconsin; Madison WI 537 USA