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 ?
Twelve bread and ten einkorn wheat genotypes were used as plant material and seven drought stress levels were applied based on a three-replicate factorial restricted randomized block design in order to investigate their effects on germination rate (GR), germinating power (GP), coleoptile length (CL), shoot length (SL), root length (RL), shoot root length ratio (SRLR), root fresh weight (RFW), root dry weight (RDW), and root fresh dry weight ratio (RFDWR) during the year 2014-2015.
According to Cothren and Oosterhuis (2010), the root growth is inhibited by auxin in proportions promoting the stems and coleoptile elongation, which could explain the shoot growth stimulation in contrast with the root inhibition, as demonstrated in Table 2.
Seedlings with root length of 3-5 cm and coleoptile length of about 2 cm were ideally selected for colchicine and pendimethalin treatments.
According to data analysis, significant differences were observed between treatments (Table 1 and 2), except for panicle length (PL), coleoptile length (CL) and radicle length (RL).
Avena coleoptile which both exhibit guttation when illuminated
Berg on the elongation of wheat coleoptile and to test the phytotoxicity of ethyl acetate extract on the germination, growth and size of the metaxylem cells of sesame seedlings.
The results presented in the figures for Vitron variety showed that the coleoptile recent seed is more developed with a maximum length of 169.
Effects of Activation and Inhibition on the Growth of the Coleoptile and on the Root System of Wheat Seeds caused by Infrared Laser Radiation
2004), even the genetic variation of aphid aggressiveness has been studied among biotypes by means of the coleoptile tests (Gimenez et al.
1]) but it did not affect coleoptile growth (Table 1).