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The stem of a seedling or embryo located between the cotyledons and the first true leaves.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Botany) the part of an embryo plant stem above the cotyledons but beneath the terminal bud
[C19: from epi- + Greek kotulē; see cotyledon]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɛp ɪˈkɒt l, ˈɛp ɪˌkɒt l)

(in a plant embryo) that part of the stem above the cotyledons.
[1875–80; epi- + Greek kotýlē cup]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
(2015, 2016) could recently transform beans with genetic markers (bar, nptII y uidA) producing chimeric regenerants through direct and indirect organogenesis from epicotyl. However, the established protocol did not rendered stable genetic transformation (Collado et al., 2016).
using epicotyl segments by direct organogenesis from in vitro papaya seedling plants.
Press wheels perform the function of pressing the soil laterally to the seeds, causing the layer in the center of the row to be less dense, thus reducing the effort needed for epicotyl emergence.
Interchangeable effects of gibberellic acid and temperature on embryo growth, seed germination and epicotyl emergence in Ribes multiflorum ssp.
In this context, the objective of this work was to evaluate the explants types and the concentrations of growth regulators able to promote the formation of regenerative calluses and adventitious shoots in segments of epicotyl and hypocotyl of Dipteryx odorata, aiming the propagation and multiplication of the species.
Most of our dead propagules exhibited almost no epicotyl or root system expansion, as observed by Scherrer (1988) during a simulated oil spill experiment.
The material (root, hypocotyl, cotyledons, epicotyl and eophyll) were fixed in glutaraldehyde (1% in 0.1 M phosphate buffer, pH 7.2) (Karnovsky, 1965) and later transferred to 70% ethyl alcohol following the protocol of Johansen (1940).
The objective of the present study was to determine a protocol for the in vitro propagation of Aspidosperma polyneuron using epicotyl and hypocotyl explants obtained from in vitro germinated seeds.
Paeonia lactiflora seeds display both hypocotyl and epicotyl dormancy and time from sowing to fully germination takes six to seven months under natural conditions.
Various explants such as leaf, stem, epicotyl, node, internode, axillary shoot tip, petiole, hypocotyl, root, cotyledonary leaf, and embryo are employed for regeneration (Tables 2 and 3).
Their explants were the cotyledonary nodes, with the epicotyl, hypocotyl and cotyledons removed.