Once the pollen tube reaches the ovule, the tube bursts releasing PTCs and two sperm cells that can fertilize the egg cell and the central cell. Yellow lines on the ovule after fertilization (seed ...

Pusan National University researchers identified two RALF peptides, OsRALF17 and OsRALF19, in rice (Oryza sativa) and characterized their role in pollen tube germination and elongation ...