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Germination
Early growth and tillering
Stem elongation
Wheat apex development
Flowering and fertilisation
Pollen release
Grain growth 1 to 4 days
Whole grain photographs
Embryo sac: events inside
Embryo sac: wall changes
Embryo micrographs
Grain growth 4 to 10 days
Cell layers inside a grain
Grain filling 11 to 16 days
Grain filling 17 to 21 days
Grain filling 21 to 30 days
Development of the embryo
Dry down 30 to 40 days
How we grew the plants
Photography and microscopy
DAYS = days after flowering
![]() | The cellular endosperm had increased markedly by 3 days after fertilization but the embryo has barely changed. |
![]() | At higher magnification, the embryo has a characteristic shape but shows no discernable cell patterning as yet. 3 days after fertilization. |
![]() | The embryo is just 2 days old and may have divided only once. At this stage it is supported by the cellular endosperm which is close by at the base of the embryo sac. The cellular endosperm is a product of divisions of the second polar event nucleus. |