1. Department of Structural and Functional Botany; University of Vienna; 1030 Wien, Rennweg 14 Austria
2. Department of Plant Science and Environmental Ecology; Faculty of Resource Science and Technology; Universiti Malaysia Sarawak; 94300 Samarahan, Sarawak Malaysia
3. Pusat Pengajian Sains Kajihayat [School of Biological Sciences]; Universiti Sains Malaysia; 11800 USM Pulau Pinang Malaysia