Touch-induced gene (IbTCH1) from sweet potato [Ipomoea batatas (L.) Lam.]: molecular cloning and functional analysis - Sang-Gyu Seo; Ji-Seong Kim; Seung-Won Kang; Mi-Rae Shin; You-Sun Yang; Gung-Pyo Lee; Jin-Sung Hong; Sun-Hyung Kim (Plant Biotechnology Reports, 2008)