proembryo


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Related to proembryo: pre-embryo

proembryo

(prəʊˈɛmbrɪəʊ)
n, pl -bryos
(Botany) any of the stages prior to embryo formation in plants
References in periodicals archive ?
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).
After double fertilization the proembryo developed into a mature embryo going through the clavate globular heart torpedo and cotyledon stages.
Interestingly, TDFs of cytidine triphosphate synthase 2 (CTPS-2) were found in mature zygotic embryo as well as in proembryo and embryogenic cells suspensions.
1a) is characterized by a basal visible ovule or proembryo, where either the ovule is not fertilized, or cell division has terminated at a very early stage of embryo development (3-8 cells; Kato, 1964).
proembryos), and it usually takes approximately 4-6 months of after-ripening for the proembryo to mature in order for the seed to germinate (Grobbelaar, 2004; Woodenberg et al., 2007).
The two daughter cells of ca commonly divide by a vertical wall and constitues to form a proembryo of four cells.
At 5 to 9 WAS, 24 to 55% of the ovules were fertilized, [approximately equal to] 10% of the embryos aborted, and 7 to 45% formed a proembryo at 24 h corresponding to seed set.
proembryo and precotyledonary embryo stages were not identified, and the
Proembryo proliferation and development could be quantified after
Aboveground organs of sporophyte from: 0 = apical hemisphere of proembryo; 1 = basal hemisphere of proembryo; 2 = lateral hemisphere of proembryo.
During early embryogenesis, from the quadrant and octant stages up to the globular proembryo [ILLUSTRATION FOR FIGURE 1A OMITTED], there is no significant difference between monocots and dicots (Natesh & Rau, 1984).
Somatic proembryo production from excised, wounded zygotic carrot embryos on hormone-free medium: Evaluation of the effects of pH, ethylene and activated charcoal.