On behalf of the Organizing Committee, it is our great pleasure to cordially invite you to participate in “the 21st Conference of the International Plant Growth Substances Association (IPGSA)” to be held in Shanghai, China from June 18th to 22nd, 2013. The IPGSA Conference, held every three years each time in a different continent, which will be a great opportunity to learn about the most recent advances in related areas of plant sciences, and to establish collaborations between the scientists from different countries. The deliberations during the IPGSA Conference are comprised of invited lectures by the leading scientists in different disciplines and over 18 concurrent sessions to connect plant growth substances with all aspects of current plant biology. The Conference will provide a unique opportunity to listen to, and interact with the pioneers from different groups of plant biology, and a platform for interactions between the young and the experienced scientists to share the ground-breaking research. The venue of the Conference is the historical, charming and fascinating metropolis city of Shanghai, China. With this landmark event we celebrate the first IPGSA Conference to be held in China. We are confident that Shanghai and the acclaimed International Convention Center will live up to your high expectations for sciences and enjoyments. We’re looking forward to meeting you in Shanghai in 2013.