WheatBP

Back to cerealsdbDevelopment Home Germination Early growth and tillering Stem elongation Wheat apex development Flowering and fertilisation Pollen release Grain growth 1 to 4 days Grain growth 4 to 10 days Whole grain photographs Endosperm cellularisation Embryo sac: wall changes Embryo micrographs
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

Grain growth 4 to 10 days

Embryo micrographs

	The base of the grain in longitudinal section at 5 days after flowering. The nucellus cushions the developing embryo and endosperm within the mother tissues. The embryo is tiny and is supported by the cellular endosperm
	The embryo at 5 days after flowering. Just a few cell divisions have produced an embryo with a characteristic globular shape. The two cell layers of the inner integument are still clearly seen. Other layers surrounding the embryo sac undergo change.
	At the same magnification and 6 days after flowering. It is easy to distinguish the cytoplasmic cellular endosperm, near the embryo, from the rapidly developing vacuolated endosperm in the rest of the embryo sac.
	The 7 day old embryo, at the same magnification as above. The embryo has grown and within the globular shape a dermatogen can be seen surrounding the central cells. The root pole has started to differentiate.

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