1. Department of Botany, Banaras Hindu University, Varanasi 221005, India
2. Department of Botany, Indira Gandhi National Tribal University, Amarkantak (MP) 484 886, India
3. Faculty of Science and Technology, Meijo University, Nagoya 468-8502, Japan
4. Research Institute, Meijo University, Nagoya 468-8502, Japan