TY  - JOUR 
T1  - Changes in anatomy and chlorophyll synthesis in orchids propagated in vitro in the presence of urea
JO  - Acta Scientiarum. Agronomy
A1  - Silva Júnior, Jessé Marques da
A1  - Rodrigues, Marcelo
A1  - Castro, Evaristo Mauro de
A1  - Bertolucci, Suzan Kelly Vilela
A1  - Pasqual, Moacir
SN  - 1807-8621
UL  - 10.4025/actasciagron.v35i1.15356
VL  - 35 
Y1  - 2013
PB  - Brazil 
ER  -