International Science Community Association International Research Journal of Biological Sciences 2278 - 3202 6 3 2017 03 10 Induced mutagenic effect of chemical and physical mutagens on pollen sterility in sunflower (Helianthus annus L.) 55 57 EN Senthilkumar S.R. 1 Department of Botany, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Sivakumar T. 2 Department of Botany, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Arulmozhi K.T. 3 Physics Wing (DDE), Annamalai University, Annamalainagar 608 002, Tamil Nadu, India Mythili N. 4 Department of Physics, Mohamed Sathak Engineering College, Kilakarai-623806, Ramnad, India S. Geetha 1 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women Sivakasi, Tamilnadu, India Ranjani S. Subha 2 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women Sivakasi, Tamilnadu, India Dutta Dandeswar 1 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Hazarika Protul 2 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Hazarika P. 3 Rain Forest Research Institute, Jorhat-785001, Post Box No-136, Assam, India Das Manotosh 1 Department of Aquaculture Management & Technology, Vidyasagar University, Midnapore, West Bengal, India and Department of Fishery, Govt. of West Bengal, India Hamel Tarek 1 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Boulemtafes Amir 2 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Slimani Abderachid 3 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Madoui Bachir El Mouaz 4 Ecology of terrestrial and aquatic systems laboratory, Badji Mokhtar University, Annaba-23000, Algeria Drid Mohamed Djaber 5 Department of Biology, Badji Mokhtar University, Annabam-23000, Algeria Kadam Pavan M. 1 Department of Chemistry, Shri Vyankatesh Arts, Commerce & Science College, Deulgaon Raja Dist. Buldana, Maharashtra, India Kakde Nilesh P. 2 Department of Botany, Shri Vyankatesh Arts, Commerce & Science College, Deulgaon Raja Dist. Buldana, Maharashtra, India Rajeswari P. 1 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women, Sivakasi-626123, Tamil Nadu, India Deepika K. 2 Department of Microbiology, The Standard Fireworks Rajaratnam College for Women, Sivakasi-626123, Tamil Nadu, India Jamdhade Vijayata P. 1 Department of Batany, Vasant Mahavidyalaya Kaij, Dist. Beed Maharashtra-431123, India Kashid Navnath G. 2 Department of Batany, Vasant Mahavidyalaya Kaij, Dist. Beed Maharashtra-431123, India > Short Communication 2016 11 29 2017 03 10 Sunflower [Helianthus annus L.] belongs to family composite (Asteraceae). In the present study experimental seeds of two sunflower cultivars namely ‘Bhanu’ and ‘SS­56’ treated with various concentration of chemical mutagens [EMS and SA] and physical mutagen (Gamma rays). Effect of these mutagens on pollen sterility were studied in M 1 generation. The maximum pollen sterility in the variety of Bhanu (71.42%) could be observing in gamma ray 10 kR while variety of SS-­56 (42.32%) observed in EMS 0.10 %. The induced mutation plays an important role in crop improvement, either through physical and chemical mutagens. Copyright@ International Science Community Association