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The sheath surrounding the radicle in monocotyledons.



a calyptrate sheath that surrounds the primary root, enclosed in the seed of a plant. It performs a protective function. The coleorhiza is characteristic of cereal grains; it is also present in eucalypti. The growing rootlets rupture the seed (caryopsis), causing it to sprout.

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Proline, soluble sugars, and fructans accumulated in embryos at the coleorhiza and the radicle stage when seeds were exposed to 3 [degrees] C (Table 2).
Low temperature treatment did not modify the relative distribution of fatty acids of Ot220 or America at the coleorhiza or radicle stages.
Ot220 and America at the coleorhiza and radicle stage following treatment at 17 and 3 [degrees] C (mean [+ or -] SD).
Coleorhiza stage Ot220 Fatty acid 17 [degrees] C 3 [degrees] C --% mol/mol-- 16:0 17.
The Cyt c pathway contributed approximately 70% of the total oxygen consumption for both cultivars except at the coleorhiza stage for Ot220 where the contribution was 50%.
9 [degrees] C for the coleorhiza and radicle stages, respectively.