Starch grains develop within mycosomes from fungi and plants.

<p>(a–i) Starch grains from <i>Taphrina</i> and <i>Rhodotorula</i> mycosomes filtered 0.8 µm. (a–b) A <i>Taphrina</i> protoplast containing numerous starch grains and static yeast cells (MR stain). (b) An enlarged portion of (a) showing the yeast cells, some of which develop as division products of starch-Ms. (c–i) <i>Rhodotorula,</i> AB/SIV stain; (c) Cytoplasmic fungal protoplasts contain starch granules that (d) develop within the vacuole-like PMO. (e–f) A starch-Ms stained with AB (e), then with MR (f). (g) Starch-Ms often form lipoid-Ms from their boundary. (h–i) Large granules show the bounding Ms-membrane (arrows) and typical growth rings (arrowheads). (j) A fungal protoplast cultured from kiwifruit cell extract is packed with large and small Ms-starch grains (AB/SIV stain). (k) An enlargement of boxed area (j), showing chain-like division of Type II Ms-starch grains. (Inset l): A dividing Type II starch-Ms, photographed inside a kiwifruit cell (MR stain). Bars = 10 µm. Use bar (b) for c through i.