coleorhiza


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coleorhiza

a structure similar to the COLEOPTILE but located around the radicle of young seedlings.
References in periodicals archive ?
A coleorhiza is found in the embryos of the grass family (Poaceae) but its origin and homology is disputed (Black et al.
by stating: "The coleoptile and coleorhiza are not considered to be parts generated by the eventual shoot and root meristems.
More research on the origin of the coleorhiza is required, but based on the available information, we are postulating that the coleorhiza of the grass embryo as well as the coleorhiza of the cycad embryo is the remaining distal part of the suspensor and both structures are therefore structurally homologous and should be referred to as a coleorhiza.
Sensitivity to low temperatures was evaluated by the following parameters: (i) the number of days to the initiation of coleorhiza emergence (Di), (i) the number of days for 50% of the seed population to germinate ([D.
Groups of 30 seeds were grown at 3 or 17 [degrees] C until they reached the coleorhiza or radicle stage of development; then they were exposed to freezing treatments (0, -3, -6, or -10 [degrees] C) for 2 h.
Oxygen consumption of intact embryos germinated at 3 [degrees] C was measured polarographically at 20 [degrees] C with a Clark-type electrode at the coleorhiza and radicle stages.