TY - SER AU - Silva,D.H.da AU - Rossi,M.L. AU - Boaretto,A.E. AU - Nogueira,N.de L. AU - Muraoka,T. TI - Boron affects the growth and ultrastructure of castor bean plants KW - MAMONA KW - BORO KW - CRESCIMENTO KW - INIBIDOR DE CRESCIMENTO KW - TOXIDEZ ER -