Coleoptile

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coleoptile

[‚kō·lē′äp·təl]
(botany)
The first leaf of a monocotyledon seedling.

Coleoptile

 

the first leaf of cereal grasses, which has no blade and consists of a closed tubule. It is colorless, green, or reddish. The coleoptile encloses and protects the young sprout, the plumule, and the growing point of the stem. It penetrates the soil with its hard apex, which then ruptures; causing the grain to sprout. A new leaf emerges from the top of the coleoptile. The coleoptile, which subsequently dries up, apparently is the middle part of the cotyledon.

References in periodicals archive ?
When a rice seed germinates, plant parts called the mesocotyl and coleoptile are the first to push forth.
Dilday says, the lengths of the mesocotyl and coleoptile were actually doubled.
Osmotic stress suppresses cell wall stiffening and the increase in cell wall bound ferulic and diferlic acids in wheat coleoptiles.
Germination, Coleoptiles long, long primary roots, Coleoptiles tallest, longest root length of seedlings was measured.
The characteristic feature of most coleoptiles between genotypes, and the interaction between the genotype of the experimental conditions, there was a significant difference in the 1% level.
5% KCl for 16 h reduced both coleoptile and radicle length of corn.
The coleoptile length was positively responded to pyridoxine-priming duration treatments of 6, 12 and 24 h (p<0.
Coleoptiles during the winter type varieties had the highest figure of the second group but Bzvstaya common varieties Bayat (spring type), respectively.
Grouping of three types of wheat as a witness in a controlled and optimal conditions grew overall from the above sum is determined for the three adjectives mean root length, the length of the first leaf during growth and Coleoptiles, two types of winter Byshtraz among other types, such as type and spring type reaction have shown.
Last day of root length, shoot length and coleoptiles length with ruler was measured.
The results showed a difference in length of coleoptiles was significant in 5 percent probability level (Table 1).
Fifteen-day seedlings were measured for seminal root lengths and coleoptiles length.