Sentence examples for to micropyle from inspiring English sources
noun
In seed-bearing plants, a small opening in the integuments of the ovule through which sperm are able to access the ovum.
In this study, the seed sowing position with respect to micropyle orientation has been tested for its impact on the germination and quality of seedlings.
For example, prolonged contact of oocytes with water may lead to micropyle obstruction by the jelly coat layer, thus the enzymes may be needed to increase fertilization ability (Ciereszko et al. 2000).
The field layout was made to have four treatments that were four different sowing positions with respect to micropyle positions as described below in Table 1 and illustrated in Fig. 1.
According to Coutts (1989), if the root is displaced from its vertical position or the seeds oriented vertically upward with respect to micropyle, the tip of the root bends downward.
Interestingly, Yamamoto et al. [ 58] have observed that Trib1-deficient drosophila and mouse females are infertile; in drosophila, such a phenotype is likely due to the fact that Trib1 has been shown to regulate migration of a cluster of ovarian follicle (epithelial) cells, called border cells, leading to micropyle formation required for oocyte fertilization.
This study was initiated to assess variations in germination characteristics of seeds sown at different orientations with respect to the micropyle position and to identify the sowing position that gives the best seed germination outcomes for those tree species when measured by selected parameters.
Therefore, this study was initiated to assess variations in germination characteristics of M. ferruginea and D. regia seeds sown at different orientations with respect to the micropyle position and to identify the sowing position that gives the best seed germination outcomes for those tree species when measured by selected parameters.
The daughter cell next to the micropyle (basal cell) produces a suspensor and contributes to the root; the inner (terminal) cell gives rise to the shoot system.
The pollen in angiosperms is transferred to the surface of the megasporophyll, whereas in gymnosperms it is brought to the micropyle of the ovule itself.
Interestingly, while the ovule-derived attractant in the in vitro assay acted to guide multiple pollen tubes toward ovules, only one pollen tube gained access to each micropyle.
The direction to the micropyle v ov (t) was calculated as in Δ θ.
