Double Fertilisation Flashcards
What does double fertilisation occur after?
Successful pollination
What does the stigma secrete? What is this for the plant?
Sucrose, energy source
What does the pollen grain germinating mean?
Grows a pollen tube
What does the pollen tube secrete? What are these?
Hydrolases (enzymes that catalyse hydrolysis reactions
What do these hydrolases do?
Digest a path down the style for the pollen tube
Where does the pollen tube enter the mature embryo sac?
Through the micropyle
What does the first male gamete do when it enters the embryo sac?
Fusses with the ovum to produce a diploid zygote
What does the second male gamete do in the embryo sac? Is this diploid or haploid?
Fuses with 2 polar nuclei to form a triploid endosperm nucleus
Diploid
What is a seed?
Fertilised ovule
Where is food stored in the fruit?
Endosperm
What does the integuments become?
Testa
What does the ovary wall become?
Fruit wall
