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Topic: Embryogenesis

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In the News (Mon 22 Apr 19)

  Plant embryogenesis - Wikipedia, the free encyclopedia
Plant embryogenesis is a sexual or asexual reproductive process that forms new plants.
The process of embryogenesis may occur naturally in the plant as a result of sexual fertilization or asexual processes, these embryos are called zygotic embryos and develop into seeds, which germinate giving rise to seedlings.
In the subsequent torpedo and cotyledonary stages of embryogenesis, the embryo completes its growth by elongating and enlarging.
en.wikipedia.org /wiki/Plant_embryogenesis   (463 words)

 Embryogenesis   (Site not responding. Last check: 2007-10-21)
Embryogenesis is a developmental process that usually begins once the egg has been fertilized.
In general, the rate of embryonic development depends on temperature (insects are poikilothermic) and on species-specific characteristics of development.
  Embryogenesis ends when the yolk's contents have been consumed:   the immature insect is fully formed and ready to hatch from the egg.
www.cals.ncsu.edu:8050 /course/ent425/tutorial/embryogenesis.html   (1206 words)

 Embryogenesis - Wikipedia, the free encyclopedia
Embryogenesis is the process by which the embryo is formed and develops.
Other common organs or structures which arise at this time include the heart and somites, but from now on embryogenesis follows no common pattern among the different taxa of the animal kingdom.
In most animals organogenesis along with morphogenesis will result in a larva.
en.wikipedia.org /wiki/Embryogenesis   (526 words)

 Appendix A: Early Development [Stem Cell Information]
Thus, the regulation of PG cell fate in the mammalian embryo is a result of the local environment of the cells, a recurring theme in mammalian embryogenesis, and the expression of genes in the PG cells [37].
It encodes fibroblast growth factor-4 (FGF-4), a growth factor protein that is expressed together with Oct-4 in the inner cell mass and epiblast [32].
It is a general characteristic of undifferentiated cells—including embryonic cells in vivo or in vitro—that when they stop dividing, they differentiate, become quiescent or senescent (stop their progress through the cell cycle and enter a period of temporary or permanent "rest"), or die.
stemcells.nih.gov /info/scireport/appendixA.asp   (8731 words)

 embryo3e   (Site not responding. Last check: 2007-10-21)
The embryogenesis of the annual killifishes starts only after the blastogenesis or the diapause DI have been completed.
The embryogenesis in the non-annual killifishes proceeds simultaneously with the second subphase of the blastogenesis - the formation of gastrula.
Consequently, the embryogenesis and blastogenesis of the non-annual killifishes are united in time and space.
www.akvarium.cz /halancici/CDdemoe/biologie/embryologie/embryo3e.html   (416 words)

 Tissue Culture & Somatic Embryogenesis
Somatic embryogenesis and plant regeneration in tissue cultures of sweet potato (Ipomoea batatas Poir.).
Inhibition of somatic embryogenesis in response to 2,3,5-triiodobenzioc acid and 2,4-dichlorophenoxyacetic acid in Ipomoea batatas (L.) Lam.
High frequency somatic embryogenesis from cultured shoot apical meristem domes of sweet potato (Ipomoea batatas).
www.hos.ufl.edu /djcweb/Pub2.htm   (718 words)

 Title of Invention: Method for regeneration of coni ferous plants by somatic embryogenesis
Somatic embryogenesis in immature embryos and protoplasts of Pinus caribaea.
Progress in somatic embryogenesis can in part be evaluated by the level of success in three important steps of the process: (1) initiation of embryogenic cultures, (2) production of fully developed somatic embryos, and (3) establishment of somatic embryo plants under field conditions.
Although other somatic embryogenesis regeneration protocols for conifers have been published, none of these methods have proven totally effective with the Pinus species in that none enabled the practitioner to reliably proceed from the beginning step of explant collection to completion of the regeneration process resulting in establishment of plants in field conditions.
www.nal.usda.gov /bic/Biotech_Patents/1995patents/05413930.html   (15425 words)

 NEW EMBO MEMBER'S REVIEW: Apical-basal pattern formation in Arabidopsis embryogenesis -- Jürgens 20 (14): 3609 -- ...   (Site not responding. Last check: 2007-10-21)
as occurs in embryogenesis (Malamy and Benfey, 1997).
Liu,C.-M., Xu,Z.-H. and Chua,N.-H. (1993) Auxin polar transport is essential for the establishment of bilateral symmetry during early plant embryogenesis.
Luo,Y. and Koop,H.U. (1997) Somatic embryogenesis in cultured immature zygotic embryos and leaf protoplasts of Arabidopsis thaliana ecotypes.
embojournal.npgjournals.com /cgi/content/full/20/14/3609   (6117 words)

 somatic embryogenesis lab   (Site not responding. Last check: 2007-10-21)
Somatic embryogenesis refers to the initiation of embryos from previously differentiated somatic cells.
As a result, somatic embryogenesis techniques have contributed a great deal of information on the genetic, morphological and physiological changes which take place during zygotic embryo formation in vivo and during early development.
In addition to a model system for understanding embryo development, somatic embryos may be used as a convenient way to propagate large numbers of genetically identical individuals without many of the manipulations necessary to induce root and shoot formation.
www.uwrf.edu /~dc01/somatlab.html   (381 words)

 Calcium-Mediated Signaling during Sandalwood Somatic Embryogenesis. Role for Exogenous Calcium as Second Messenger -- ...
Percentage embryogenesis in the different culture treatments was calculated relative to the 100% embryogenesis obtained in unmodified MS or the DMSO control both containing 3.9 m
The reduction in the percentage embryogenesis by W7 culture treatment indicates that CaM or a related Ca -modulated protein is involved in perceiving the Ca signal.
Komamine A, Kawahara R, Matsumoto M (1992) Mechanism of somatic embryogenesis in cell cultures: physiology, biochemistry and molecular biology.
www.plantphysiol.org /cgi/content/full/123/4/1301   (4262 words)

 hair biology - hair follicle embryogenesis
In embryogenesis the establishment of a dermal papilla (DP) is vital to the development of all hair follicles and associated modified structures like sebaceous glands.
The DP is a group of specialized dermal fibroblast cells, derived from the embryonic mesoderm.
The very first stages of hair follicle embryogenesis are shown in the pictures above.
www.keratin.com /aa/aa001.shtml   (940 words)

 Somatic Embryogenesis   (Site not responding. Last check: 2007-10-21)
In vitro somatic embryogenesis can occur from different types of explants and can be induced by the auxin analogue 2,4 -D in many different species.
Somatic embryogenesis in tetraploid alfalfa is a qualitative trait under the control of two dominant genes with complementary effects.
Somatic embryogenesis is a potentially useful trait in alfalfa because it could be used to obtain large quantities of parental material for the production of limited synthetic or hybrid seed.
www.plant.uoguelph.ca /research/plantbio/somatic.htm   (388 words)

 Title of Invention: Method and media for the somati c embryogenesis and regeneration of bamboo
Somatic embryogenesis is now recognized as an acceptable method for plant propagation in vitro because it enables the rapid production of a large number of uniform plants within a relatively short period of time (Rao, et al., supra).
The present invention also provides a medium capable of inducing somatic embryogenesis of an explant from a callus or plantlet obtained through organogenesis of a vegetative explant of a bamboo plant, whereby the number of embryos obtained is vastly multiplied.
It is this specific combination of auxins, BA and sugar in the nutrient medium which induces embryogenesis from the organogenic callus explants, giving rise to multiple embryos from a single explant.
www.nal.usda.gov /bic/Biotech_Patents/1994patents/05334530.html   (3312 words)

 Sloan-Kettering - Projects: Genes that Control Mouse Embryogenesis   (Site not responding. Last check: 2007-10-21)
Because many of the genes that control mammalian development have not been identified, we are using a genetic approach to identify genes that control important events in the early mouse embryogenesis.
We are particularly interested in 2 classes of mutations: those that alter cell type specification in the nervous system and those that affect early morphogenesis and mesoderm patterning.
This project is a component of the Sloan-Kettering Mouse Project: a collaboration with the laboratories of Lee Niswander and Elizabeth Lacy to screen for mutants that affect 3 stages of mouse embryogenesis.
www.mskcc.org /mskcc/html/10176.cfm   (793 words)

 Somatic Embryogenesis in Arabidopsis thaliana Is Facilitated by Mutations in Genes Repressing Meristematic Cell ...
Somatic Embryogenesis in Arabidopsis thaliana Is Facilitated by Mutations in Genes Repressing Meristematic Cell Divisions -- Mordhorst et al.
Somatic Embryogenesis in Arabidopsis thaliana Is Facilitated by Mutations in Genes Repressing Meristematic Cell Divisions
somatic embryogenesis trait of pt in wild-type (Ler) seedlings.
www.genetics.org /cgi/content/full/149/2/549   (6402 words)

 PLANT TISSUE CULTURE-RELATED BOOKS   (Site not responding. Last check: 2007-10-21)
The rapid progress in somatic embryogenesis and its prospects for potential application for improving woody plants prompted Kluwer to issue this book initially in three volumes, and now an additional three more volumes.
Somatic embryogenesis in fruit and forest trees of arid zone; R.R. Bhansali, M. Singh.
Somatic embryogenesis induction in tamarillo (Cyphomandra betacea); M.L. Lopes, et al.
www.agritechpublications.com /soma6.htm   (462 words)

 Telomere length is reset during early mammalian embryogenesis -- Schaetzlein et al. 101 (21): 8034 -- Proceedings of ...
Telomere length is reset during early mammalian embryogenesis -- Schaetzlein et al.
embryogenesis (1–5) and is crucial for the maintenance
are elongated at this particular stage of bovine embryogenesis.
www.pnas.org /cgi/content/full/101/21/8034   (3148 words)

Embryogenesis is the result of a regulated program of gene activity and the elucidation of the program for loblolly pine is the goal of this project.
The NSF Genomics of Loblolly Pine Embryogenesis is a joint effort by the Institute of Paper Science and Technology (IPST) and The Institute for Genomic Research (TIGR).
The NSF Genomics of Loblolly Pine Embryogenesis Project at IPST and TIGR is funded by the National Science Foundation.
www.tigr.org /tdb/e2k1/pine/index.shtml   (623 words)

 Expression of the viviparous 1 (Pavp1) and p34cdc2 protein kinase (cdc2Pa) genes during somatic embryogenesis in Norway ...
Expression of the viviparous 1 (Pavp1) and p34cdc2 protein kinase (cdc2Pa) genes during somatic embryogenesis in Norway spruce (Picea abies [L.] Karst) -- Footitt et al.
Bozhkov PV, Filonova LH, von Arnold S. A key developmental switch during Norway spruce somatic embryogenesis is induced by withdrawal of growth regulators and is associated with cell death and extracellular acidification.
Shiota H, Satoh R, Watabe K, Harada H, Kamada H., the carrot homologue of the Arabidopsis ABI3, is expressed during both zygotic and somatic embryogenesis and functions in the regulation of embryo-specific ABA-inducible genes.
jxb.oxfordjournals.org /cgi/content/full/54/388/1711   (4169 words)

Somatic embryogenesis has been described for more than a hundred plant species (Terzi and Loschiavo, 1990), but the number of reports of somatic embryogenesis among members of the Asteraceae family is still low (May and Trigiano, 1990).
To investigate the influence of growth regulators on the induction of somatic embryogenesis, in vitro leaves of Stevia rebaudiana (2 cm) obtained as described were inoculated on basal medium containing 10 or 25 mM 2,4-dichlorophenoxy acetic acid (2,4-D) and 1 or 5 mM 6-Benzylaminopurine (BA) under a high concentration of sucrose (120 g/L).
The influence of high levels of sucrose on the induction of somatic embryogenesis may be due to increased osmotic potential of the media.
www.lni.unipi.it /stevia/stevia/inducton.htm   (1148 words)

 An Aquaglyceroporin Is Abundantly Expressed Early in the Development of the Suspensor and the Embryo Proper of Loblolly ...
Embryogenesis is a critical period in the earliest stages of the sporophytic generation of plants.
Becwar MR, Pullman GS (1995) Somatic embryogenesis in loblolly pine (Pinus taeda L.).
Schulz P, Jensen WA (1969) Capsella embryogenesis: the suspensor and the basal cell.
www.plantphysiol.org /cgi/content/full/127/4/1556   (5988 words)

The chapters contained in Section C are focused on somatic embryogenesis in gymnosperms, including Pinus patula, Encephalartos, Picea wilsonii, Pinus banksiana, hybrid firs, and Taxus.
Somatic Embryogenesis and Evaluation of Variability in Somatic Seedlings of Quercus serata by RAPD Markers; K.
Somatic Embryogenesis in Kiwifruit (Actinida sp.); M.M. Oliveira.
www.agritechpublications.com /somabk4.htm   (614 words)

 An expanded role for the TWN1 gene in embryogenesis: defects in cotyledon pattern and morphology in the twn1 mutant of ...
An expanded role for the TWN1 gene in embryogenesis: defects in cotyledon pattern and morphology in the twn1 mutant of Arabidopsis (Brassicaceae) -- Vernon et al.
An expanded role for the TWN1 gene in embryogenesis: defects in cotyledon pattern and morphology in the twn1 mutant of Arabidopsis (Brassicaceae)
1997 Fundamental concepts in the embryogenesis of dicotyledons: a morphological interpretation of embryo mutants.
www.amjbot.org /cgi/content/full/88/4/570   (6230 words)

 Three major somatic embryogenesis related proteins in Cichorium identified as PR proteins -- Helleboid et al. 51 (348): ...
Boyer C, Hilbert JL, Vasseur J. Embryogenesis related protein synthesis and accumulation during early acquisition for somatic embryogenesis competence in Cichorium.
Endochitinase and beta-1,3-glucanase genes are developmentally regulated during somatic embryogenesis in Picea glauca.
Van Hengel A. Chitinases and arabinogalactan proteins in somatic embryogenesis.
jxb.oxfordjournals.org /cgi/content/full/51/348/1189   (6188 words)

 New genes with roles in the C. elegans embryo revealed using RNAi of ovary-enriched ORFeome clones -- Fernandez et al. ...
embryogenesis for genes giving rise to high penetrance lethality.
The 158 new genes we have identified with roles in embryogenesis
known to be required for embryogenesis or oogenesis.
www.genome.org /cgi/content/full/15/2/250   (7044 words)

 Specification of Regions of DNA Replication Initiation during Embryogenesis in the 65-Kilobase DNApolalpha -dE2F Locus ...
Specification of Regions of DNA Replication Initiation during Embryogenesis in the 65-Kilobase DNApolalpha -dE2F Locus of Drosophila melanogaster -- Sasaki et al.
Next we studied when the initiation region and the noninitiation region of DNA replication were specified during embryogenesis.
Studies of nuclear and cytoplasmic behaviour during the five mitotic cycles that precede gastrulation in Drosophila embryogenesis.
mcb.asm.org /cgi/content/full/19/1/547   (6491 words)

 [No title]
(886aa) 20 TMS, N-term is IN 4920.m00172137718 embryogenesis transmembrane protein-relatedo_sativachr_11OSJNBa0059J064920
(1145aa) 19 TMS, N-term is IN 6151.m00232137718 embryogenesis transmembrane protein-relatedo_sativachr_6B1066D096151
(924aa) 20 TMS, N-term is IN 6151.m00234137718 embryogenesis transmembrane protein-relatedo_sativachr_6B1066D096151
biosci.cbs.umn.edu /rice/osprotdb/fam2545.htm   (205 words)

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