Trehalose-6-P synthase1 which catalyses the first step in trehalose synthesis is essential for Arabidopsis embryo maturation. - Eastmond,P..J..; Dijken,A..J..; Spielmann,M..; Kerr,A..; Tissier,A..F..; Dickinson,H..G..; Jones,J..D..; Smeekens,S..C..; Graham,I..A.. (Plant J., 2002)