Embryo immature

Shoot, seeds, mature zygotic embryo, immature embryo, anther and inflorescence (Figure 1) can be used as explants of bamboo regeneration (Huang Murashige, 1983 Pei et al.. 

Beagle embryos age 55 days, or pups 2 days old, given single acute exposure of 0.16, 0.83, or 1.25 Gy Dose-dependent increase in immature dysplastic glomeruli and other signs of progressive renal failure 4... 

Mesenchymal tissue is immature, unspecialized tissue, found in the early embryo of animals, whereas epithelial cells are parenchymal cells that line an internal cavity or tube. 

Estrogenic effect. Polished rice, in the ration of immature female rats, was active " . Saponifiable fraction of the embryo, administered subcutaneously to female mice, was active " . Seed oil, administered orally to female mice at a dose of 10% of the diet, was active ". ... 

Based on initial studies using rice transformants, it was found that the choice of promoters used to express proper foreign protein in cereals is also important. For example, the promoter element that encodes the Ubil gene-encoding uhiquitin, when combined with an intron, elicited higher levels of expression of foreign protein in immature wheat, maize, and rice embryos than the 35S CaMV promoter (Christou, 1997). 

Many seeds become dormant as a means of survival and are able to germinate after many years in the soil. Factors that influence seed germination and seed dormancy include temperature, moisture, oxygen, light, inhibitors (e.g., allelopathic effects), hardness or impermeability of seed coats, mechanically resistant seed coats, immature embryos, and after-ripening requirements (e.g., cool temperatures for several months). Weed seeds may survive and germinate due to several of these characteristics (Pareja et al, 1985). 

Finer, J.J., Direct somatic embryogenesis and plant regeneration from immature embryos of hybrid sunflowers (Helianthus annuus L.) on a high sucrose-containing medium, Plant Cell Rep., 6, 372-374, 1987. 

Freyssinet, M. and Freyssinet, G., Fertile plant regeneration from sunflower (Helianthus tuberosush.) immature embryos, Plant Sci., 56, 177-181, 1988. 

Wilcox, A.W., McCann, A., Cooley, G., and Van Dresser, J., A system for routine plantlet regeneration of sunflower from immature embryo-derived callus, Plant Cell Tissue Organ Cult., 14, 103-110, 1989. 

What we have considered up to this point, may have created the impression that only deregulation and dysfunctions of cellular proliferation cause cancer. Of course this is not true. Reactivation of developmental programmes operative in the embryo and the emergence of immature ceil t3 es play an important role in the genesis of tumours. 

Eujita N, Taira T. A 56-kDa protein is a novel granule-bound starch synthase existing in the pericarps, aleurone layers, and embryos of immature seed in diploid wheat (Triticum monococcum L.). Planta 1998 207 125-132. 

Larva—Immature form (worm like in insects fishlike in amphibians) of a metamorphic animal which develops from the embryo and differs radically from the adult. 

Fig. 97.—A, Immature angiospermous ovule B, same, after embryo-sac e.s). has matured to form the female gametophyte nucellus nuc) outer integument (0. int) inner integument (t. int) embryo sac e.s.) micropyle mic) chalaza ch) funiculus (/) synergids s) ovum (0) polar nuclei p) antipodals a) C, fertilized and matured angiospermous ovule (seed). Note that the nucellus nuc) has been pushed out by the encroachment of the embryo sac, in which endosperm has formed by the fusion of the two polar nuclei with the second sperm nucleus from the pollen tube which has later divided to form numerous nuclei scattered about in the protoplasm of the embryo sac and accumulated protoplasm and laid down walls, within which nourishment was stored embryo em) from fertilized ovum testa t) from outer integument tegmen te) from maturation of inner. integument micropyle mic) hilum or scar (h), after funiculus became detached.

Embryo culture In vitro development or maintenance of isolated mature or immature embryos. 

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