...+ ; green, low Ca 2+ ). ( B ) FER-dependent NTA relocalization occurs after pollen tube arrival. ( C ) Synergid degeneration is accompanied by loss of synergid nuclear integrity. ( D ) Pollen tube burst, sperm release and double fertilization. The complexity of the pollen–pistil system becomes...

... identified that act on the cell surfaces of the gametes to regulate gamete compatibility and fertilization success. In contrast, exploring plant gamete interaction during double fertilization, a characteristic trait of flowering plants, has been hampered for a long time because of the protected location...