The megaspore tetrads are arranged linearly, and the megaspore at the
chalazal end is functional.
Occurring at the
chalazal end of the ovule there is a cup-shaped region of thick-walled cells (see Figure 4G).
Detail of
chalazal and micropylar region of the ovule in longitudinal section.
Seed length was measured from hilar to
chalazal end; seed width and thicknesses were taken at the mid portion and the widest part, respectively, of the seed.
A testal flange projects at the
chalazal end and the seed surface is ornamented by rounded tubercles (visible from photos of the type collection kindly supplied by M.
Se realizo un corte con bisturi en el extremo
chalazal bajo microscopio estereoscopico con aumento de 5X (Severin et al.
In the
chalazal region occurs hypostase which presents strongly staining and thick-walled cells.
Seeds 4 per fruit, compressed, more or less cuadrangular in outline with a micropilar neck and a
chalazal beak, 9-10 mm long, 5-6 mm wide and 1 mm thick.
0,7 mm wide, flattened, not thickened towards the apex, yellowish; anthers linear, subdorsifixed, slightly sagittate, with a thick green connective and dark brown to blackish thecae, pollen yellow; ovary conical, the lower 1/3 (= nectary tissue) sunk into the receptacle, yellowish, nectary tissue orange, the superior part 7 mm long; ovules white, the flat
chalazal appendage about half as long as the ovule proper; style ca.
Changes in
chalazal cell walls and in the peroxidase enzymes of the crease region during grain development in barley.
4 68 feed 1155 mama 17 5 112 deers 1446 Malay 13 6 126 booboo 1809 malaya 14 7 180 feeders 2034 layaway 11 8 228 deferred 2247
chalazal 10 9 266 deferrers 2892 Malayalam 11 10 323 feedstuffs 2522 amalgamate 7.
We've all heard of physical dormancy, but the discussion in Chapter 3, along with information in a table and a figure, brings all the information together and helps to explain (and us to remember) differences between strophioles or
chalazal plugs.
