coleoptile

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co·le·op·tile

 (kō′lē-ŏp′tĭl, kŏl′ē-)
n.
A protective sheath enclosing the shoot tip and embryonic leaves of grasses.

[From New Latin coleoptilum : Greek koleon, sheath; see kel- in Indo-European roots + Greek ptilon, plume; see pet- in Indo-European roots.]

coleoptile

(ˌkɒlɪˈɒptaɪl)
n
(Botany) a protective sheath around the plumule in grasses
[C19: from New Latin coleoptilum, from Greek koleon sheath + ptilon down, soft plumage]

co•le•op•tile

(ˌkoʊ liˈɒp tɪl, ˌkɒl i-)

n.
(in grasses) the first leaf above the ground, forming a sheath around the stem tip.
[1865–70; < New Latin coleoptilum < Greek koleó(n) sheath + ptílon soft feathers]
References in periodicals archive ?
Inhibition of auxin-induced cell elongation of maize coleoptiles by antibodies specific for cell wall glucanases.
Pooled samples of 10 coleoptiles of each of the hybrids and their parental lines in two replications were used for extraction of crude enzymes except for ADH for which seed was used.
further observed that the guttation of Zea mays coleoptiles increased
1996) also observed increased coleoptiles speed of growth in wheat seedlings when they used A.
Andoh and Kobata [2] had shown that the length of coleoptiles and seminal roots of paddy sprouts was declined as the soil water potential was lower than -0.
The S-Metolachlor is absorbed through the coleoptiles of grasses and hypocotyl of broadleaves, and operates in the terminal bud in the process of cell division, inhibiting the synthesis of lipids, fatty acids, leaf waxes, terpenes, flavonoids and proteins, interfering with hormonal regulation, inhibiting the apical meristem and root.
The "essential structures" are the root and shoot axes, cotyledons, terminal buds and the coleoptiles.
In 1881, he and his son, Francis, reported on experiments performed with grass and oat coleoptiles in The Power of Movement in Plants.
The longer coleoptiles and larger root systems of tall cultivars compared with the semidwarfs likely contributes to their relative adaptation to dry environments, where deep sowing ensures contact with available soil moisture (Rebetzke and Richards, 2000; Trethowan et al.
In his book The Power of Movement in Plants (Darwin, 1880), he describes the effects of light on movement of coleoptiles.