coleoptile


Also found in: Dictionary, Encyclopedia, Wikipedia.

coleoptile

a nonchlorophyllous protective covering over the growing shoot (PLUMULE) of young plant seedlings in certain MONOCOTYLEDONS (e.g. oats) that is the first structure to break through the soil into the air after germination. As growth proceeds the coleoptile is ruptured by the first foliage leaf of the enclosed shoot. Oat coleoptiles have been used extensively in experiments with AUXINS.
Mentioned in ?
References in periodicals archive ?
2006).Moreover, germination/emergence and seedling growth was improved by the application of Zn in priming solution(Tables 1-4)as Zn is involved in the radicle development and in the early stages of coleoptile growth and in auxin synthesis (Ozturket al.
In many species, strong asymmetrical growth in the lower scutellum and coleoptile region of the proembryo displaces the root cap and plumule away from their original basal and lateral position (Goetghebeur 1986).
For the variables coleoptile length (CL) and radicle length (CR), the results showed no differences between treatments.
The experiment was performed in triplicate with 5 coleoptile fragments and 2 mL of extract, control solution or oxyfluorfen.
According to our results, the growth of roots and coleoptile is also affected by the duration of storage, the latter driving a decrease in growth of aerial parts and root for both varieties studied.
The compounds exhibited either stimulant or inhibitory effects on germination and on radicle and coleoptile growth, depending on the formulation tested.
It also has the capacity to bind to fractions containing plasma membrane vesicles from maize coleoptiles.
Previous studies have shown that greenbug populations collected from very contrasting ecological regions of Argentina showed significant differences in reproduction behavior, lifespan, host preference (Ramos et al., 1998; Clua et al., 2004), even the genetic variation of aphid aggressiveness has been studied among biotypes by means of the coleoptile tests (Gimenez et al., 1991a, b, 1992; Castro, 1994; Castro et al., 1991).