conifers 2 kinds of cones. female seed cones immature male pollen cones
TRANSCRIPT
REPRODUCTION
Scales
Male cones produce male gametophytes called pollen grain
Female cones (seed cone) produce female gametophytes called ovules (eggs)
Embryo – same idea as zygote (egg+sperm)
Conifer Reproduction
Unfertilized ovule
seed coat
Egg(n)
Female gametophyte
(n)
In this example we are using a pine cone
Male gametophyte(pollen grain)
(n)
Femalegametophyte (n)
Dischargedsperm nucleus (n)
Micropyle
Fertilization initiates the transformation of the ovule into a seed
Conifer Reproduction
Seed coat
Food supply
Embryo (2n)Inside the seed
(new sporophyte)
Compared to a single-celled spore,
a seed is much more resistant and
complex
Conifer Reproduction