Shootward and Rootward: Peak terminology for plant polarity.
Baskin TI , Baluška F, Benfey P, Bennett M, Forde BG, Gilroy S, Helariutta Y, Hepler PK, Leyser O, Masson PH, Muday GK, Peret B, Poethig S, Rahman A, Roberts K, Scheres B, Sharp RE, Somerville C
Trends Plant Sci 15, In Press (2010)