Embryogenesis

The objective of the study was to find the explant resources, the type and concentration of plant growth regulators (PGRs), as well as the in vitro culture conditions suitable for different morphogenesis processes - callus induction, direct embryogenesis, shoot and root formation, etc. The growth and development of in vitro Ngoc Linh ginseng derived from thin cell layer (TCL) was examined in Quang Nam to assess the adaptability of in vitro Ngoc Linh plantlets in its natural territory, compared to those growing in Bidoup - Nui Ba National Park, Lam Dong.

27p capheviahe27 23-02-2021 21 5   Download

The objective of the study was to find the explant resources, the type and concentration of plant growth regulators (PGRs), as well as the in vitro culture conditions suitable for different morphogenesis processes - callus induction, direct embryogenesis, shoot and root formation, etc. The growth and development of in vitro Ngoc Linh ginseng derived from thin cell layer (TCL) was examined in Quang Nam to assess the adaptability of in vitro Ngoc Linh plantlets in its natural territory, compared to those growing in Bidoup - Nui Ba National Park, Lam Dong.

27p xacxuoc4321 09-07-2019 33 5   Download

We report the constitution and molecular characterization of a novel transglutaminase (EC 2.3.2.13) that starts to accumulate speci®cally in thenucleus in the star®sh (Asterina pectinifera) embryo after progression through the early blastula stage. The cDNA for the nuclear transglutaminase was clonedand the cDNA-deduced sequence de®nes a single open reading frame encoding aproteinwith737 aminoacids andapredictedmolecularmass of 83 kDa.

11p research12 23-04-2013 47 3   Download

Sixgenes are homologs ofDrosophila sine oculisand encode transcription factors that are characterized by a conserved Six domain and homeo-domain. Of the six family members (Six1–Six6) in mice, Six1and Six4 show similar expression patterns during embryogenesis. Six1 –⁄ – mice show defective formation of various organs such as inner ear, nose, skeletal mus-cle, kidney and thymus, whereasSix4 –⁄ – mice show little anomaly in organo-genesis.

16p awards 06-04-2013 29 2   Download

HAND2/dHAND is a basic helix-loop-helix transcription factor expressed in the heart and neural crest derivatives during embryogenesis. Although dHAND is essential for branchial arch, cardiovascular and limb development, its target genes have not been identified. The regulatory mech-anisms of dHAND function also remain relatively unknown. Here we report that Akt/PKB, a serine/threonine protein kinase involved in cell survival, growth and differ-entiation, phosphorylates dHAND and inhibits dHAND-mediated transcription....

11p awards 05-04-2013 46 5   Download

The lipolysis stimulated receptor (LSR) recognizes apo-lipoprotein B/E-containing lipoproteins in the presence of free fattyacids, and is thought tobe involved in the clearance of triglyceride-rich lipoproteins (TRL). The distribution of LSR in mice was studied by Northern blots, quantitative PCR and immunofluorescence. In the adult,LSRmRNA was detectable in all tissues tested except muscle and heart, and was abundant in liver, lung, intestine, kidney, ovaries and testes. During embryogenesis, LSR mRNA was detectable at 7.

12p awards 05-04-2013 43 4   Download

A putative transcription factor, named RAMY, that binds to the 20-bp O2S sequences of the regulatory region of the Amy2genepromoter has been identifiedusing the yeast one-hybrid system from a rice library. The full lengthRAMY cDNA clone encodes a 218-amino acid protein and is homologous to the late embryogenesis-abundant protein (LEA5). In vitromutagenesis and electrophoretic mobility shift assays confirmed that RAMY can bind with O2S spe-cifically throughanunusual zincfingerwithaCXCX4CX2H consensus sequence. ...

0p awards 05-04-2013 51 2   Download

Eukaryotic initiation factor (eIF) 4B is part of the protein complex involved in the recognition and binding of mRNA to the ribosome. Drosophila eIF4Bis a single-copy gene that encodes two isoforms, termed eIF4B-L (52.2 kDa) and eIF4B-S (44.2 kDa), generated as a result of the alternative recognition of two polyadeynlation signals during tran-scription termination and subsequent alternative splicing of the two pre-mRNAs. Both eIF4B mRNAs and proteins are expressed during the entire embryogenesis and life cycle....

14p dell39 03-04-2013 36 4   Download

Programmed cell death is a major component of both normal development and disease. The roles of cell death during either embryogenesis or pathogenesis, the signals that modulate this event, and the mechanisms of cell demise are the major subjects that drive research in this field. Increasing evidence obtained both in vitro and in vivo supports the hypothesis that a variety of cell death programs maybe triggered in distinct circumstances.

13p dell39 03-04-2013 41 4   Download

The zinc-finger cellular nucleic acid binding protein (CNBP) is a strikingly conserved single-stranded nucleic acid binding protein essential for normal forebrain formation during mouse and chick embryogenesis. CNBP cDNAs from a number of vertebrates have been cloned and analysed. CNBP is mainly conformed by seven retroviral Cys-Cys-His-Cys zinc-knuckles and a glycine⁄arginine rich region box.

13p inspiron33 23-03-2013 40 3   Download

Dual-specificity phosphatases (DSPs) constitute a subfamily of protein tyrosine phosphatases (PTPs) that dephosphorylates phospho-Tyr, phos-pho-Ser and nonproteinaceous substrates. DSPs are involved in the regula-tion of both developmental and postnatal essential processes, such as early embryogenesis, placental development and immune responses.

16p media19 05-03-2013 41 2   Download

Signal peptide peptidase (SPP) is an aspartic proteinase that hydrolyses its substrate within the plane of the cellular membrane. In vertebrates, it plays crucial roles in life processes such as differentiation, embryogenesis, cell signaling and immunological response. We first found SPP in plants. An ortholog of human SPP (AtSPP), and its five AtSPP homologs (AtSPPL1– AtSPPL5), were searched for in theArabidopsisdatabase.

10p media19 05-03-2013 39 3   Download

DNA methylation is an important mechanism involved in embryogenesis and tumor development. Changing cytosines to 5-methylcytosines in CpG dinucleotides has been found to be responsible for the inactivation of tumor suppressor genes by repressing transcription.

15p media19 04-03-2013 36 2   Download

During embryogenesis, most of the mammalian skeletal system is preformed as cartilaginous structures that ossify later. The different stages of cartilage and skeletal development are well described, and several molecular factors are known to influence the events of this enchondral ossification, especially transcription factors.

9p mobifone23 18-01-2013 32 3   Download

Protein arginine methyltransferase (PRMT)1 is the predominant type I methyltransferase in mammals. In the present study, we used zebrafish (Danio rerio) as the model system to elucidate PRMT1 expression and function during embryogenesis.

13p cosis54 05-01-2013 27 3   Download

Glutaredoxins (Grxs) have been shown to be critical in maintaining redox homeostasis in living cells. Recently, an emerging subgroup of Grxs with one cysteine residue in the putative active motif (monothiol Grxs) has been identified.

15p cosis54 05-01-2013 28 4   Download

Phát sinh phôi soma (somatic embryogenesis) in vitro là một trong những kỹ thuật mang lại hiệu quả vượt trội về tiềm năng nhân giống, hơn hẳn so với các kỹ thuật khác. Trong bài báo này, chúng tôi tìm hiểu sự phát sinh phôi soma từ mô sẹo, những biến đổi đầu tiên của những tế bào sinh phôi đến giai đoạn hình thành phôi soma. Kết quả cho thấy: mô sẹo 8 tuần tuổi trên môi trường MS (Murashige và Skoog, 1962) có bổ sung naphthalene acid acetic (NAA) 2mg/l kết hợp với benzylaminopurine (BA) 0.5 mg/l...

5p nhatro75 21-07-2012 177 24   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Characterization of expressed sequence tags obtained by SSH during somatic embryogenesis in Cichorium intybus L

12p panasonic06 26-12-2011 46 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Developmental localization and the role of hydroxyproline rich glycoproteins during somatic embryogenesis of banana (Musa spp. AAA)

12p panasonic02 14-12-2011 34 3   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Global analysis of patterns of gene expression during Drosophila embryogenesis...

24p thulanh19 05-11-2011 47 3   Download