WheatBP

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Development 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 Cell layers inside a grain Grain filling 11 to 16 days Grain filling 17 to 21 days Grain filling 21 to 30 days Whole grain photographs Endosperm micrographs Embryo micrographs
Development of the embryo Dry down 30 to 40 days How we grew the plants Photography and microscopy
DAYS = days after flowering

Grain filling 21 to 30 days

Embryo micrographs

	The scutellar epithelium is the single layer of columnar shaped cells, at the edge of the scutellum, next to the starchy endosperm. These cells are thought to have a secretory and absorptive role during germination. See the text link from the introduction to Germination.
	The embryo in longitudinal section has a well developed radicle and primordial leaves at the shoot apex. The vascular tissues of the scutellum link to the mesocotyl of the embryo.
	The above section in polarized light. Starch reserves in the endosperm are available to the embryo.
	The shoot pole of the embryo at high magnification. Primordial leaves enclose the shoot apex. A tiller bud can be seen in the axil of the first leaf.
	The root pole of the embryo at high magnification. The cap, quiescent centre, cortex, stele and epidermis of the primary root are already differentiated.
	The aleurone cells develop differently where they enclose the embryo. Where the scutellum meets the depleted endosperm the 'crushed cell layer' is formed.
	The above section in polarized light shows that starch grains are not present in the 'crushed cell layer'.
	Montage of the shoot and root poles of the embryo at 26 days after flowering. A complete miniature plant is already present in the immature seed.

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