・果実の登熟過程における細胞壁糖鎖の機能

　　　・器官脱離（落花）メカニズムの解明

H. Iwai, A. Hokura, M. Oishi, H. Chida, T. Ishii, S. Sakai and S. Satoh (2006) The gene responsible for borate cross-linking of pectin RG-II is required for plant reproductive tissue development and fertilization. Proc Natl Acad Sci USA 103 (44): 16592-16597

H. Iwai, T. Ishii, S. Sakai and S. Satoh (2006) Molecular and Functional Analysis of Pectins in Intercellular Attachment by T-DNA Tagging Using a Haploid Tobacco Tissue Culture System. The Science and Lore of the Plant Cell Wall Biosynthesis, Structure and Function, Brown Walker Press　 242-248.

H. Iwai, N. Masaoka, T. Ishii and S. Satoh (2002) A pectin glucuronyltransferase gene is essential for intercellular attachment in the plant meristem. Proc Natl Acad Sci USA 99 (25): 16319-16324.

H. Iwai, T. Ishii and S. Satoh (2001) Absence of arabinan in the side chains of the pectic polysaccharides strongly associated with cell walls of Nicotiana plumbaginifolia non-organogenic with loosely attached constituent cells. Planta 213: 907-915.