Abstract:
:To test the influence of a Nicotiana tomentosiformis repetitive sequence (R8.3) on transgene expression in N. sylvestris and in N. sylvestris-N. tomentosiformis hybrids, the R8.3 sequence was placed upstream of a nopaline synthase promoter (NOSpro)-NPTII reporter gene in a T-DNA construct. A number of transgenic N. sylvestris lines were produced and in most, the NPTII gene was expressed. In one line, however, the NPTII gene became silenced and methylated in the NOSpro region. The silenced locus was able to trans-inactivate and induce methylation of two stably expressed transgene loci comprising a similar construct. Nucleotide sequence analyses of the three transgene loci revealed that they each contained a single incomplete copy of the T-DNA, which had sustained deletions of varying sizes in the R8.3 region. Paradoxically, the R8.3 DNA upstream of the two active, unmethylated NOSpro-NPTII genes was highly methylated, whereas the R8.3 DNA upstream of the silenced, methylated NOSpro-NPTII gene was less methylated. The methylated portions of the R8.3 sequence corresponded to retroelement remnants. An active NOSpro-NPTII gene downstream of a nearly intact R8.3 sequence did not become methylated in N. sylvestris-N. tomentosiformis hybrids. Thus, methylation in the R8.3 sequence did not spread into adjoining transgene promoters and the effect of the R8.3 dispersed repeat family on transgene expression was negligible. The silencing phenomena observed with the three single-copy transgene loci are discussed in the context of other possible triggers of silencing.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Kunz C,Narangajavana J,Jakowitsch J,Park YD,Delon TR,Kovarik A,Koukalová B,van der Winden J,Moscone E,Aufsatz W,Mette MF,Matzke M,Matzke AJdoi
10.1023/a:1023937006311subject
Has Abstractpub_date
2003-05-01 00:00:00pages
203-15issue
1eissn
0167-4412issn
1573-5028journal_volume
52pub_type
杂志文章abstract::SAUR-AC1 is a small-auxin-up-RNA (SAUR) gene of Arabidopsis. Here we demonstrate that the SAUR-AC1 promoter region induces accumulation of a reporter transcript upon treatment with auxin and is preferentially active in elongating hypocotyls and certain other organs and tissues of transgenic Arabidopsis and tobacco pla...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005875300606
更新日期:1997-07-01 00:00:00
abstract::Trebouxia is the most common lichen-forming genus of aero-terrestrial green algae and all its species are desiccation tolerant (DT). The molecular bases of this remarkable adaptation are, however, still largely unknown. We applied a transcriptomic approach to a common member of the genus, T. gelatinosa, to investigate...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-016-0468-5
更新日期:2016-06-01 00:00:00
abstract::Gibberellin (GA) 20-oxidase (GA20ox) is a key enzyme that normally catalyzes the penultimate steps in GA biosynthesis. One of the GA20ox genes in rice (Oryza sativa L.), OsGA20ox2 ( SD1 ), is well known as the "Green Revolution gene", and loss-of function mutation in this locus causes semi-dwarfism. Another GA20ox gen...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-004-1692-y
更新日期:2004-07-01 00:00:00
abstract::Nodules of tropical legumes generally export symbiotically fixed nitrogen in the form of ureides that are produced by oxidation of de novo synthesized purines. To investigate the regulation of de novo purine biosynthesis in these nodules, we have isolated cDNA clones encoding 5-aminoimidazole ribonucleotide (AIR) carb...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00020176
更新日期:1994-01-01 00:00:00
abstract::Tree crops have a long juvenile period which is a serious constraint for genetic improvement and experimental research. For example, apple remains in a juvenile phase for more than five years after seed germination. Here, we report about induction of rapid flowering in apple seedlings using the Apple latent spherical ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-010-9718-0
更新日期:2011-01-01 00:00:00
abstract::The large number of mitogen-activated protein (MAP) kinase genes identified to date in plants suggests that their encoded proteins have a wide array of functions in development and physiological responses, as has been indicated by studies on the factors which lead to the activation of these kinases. Signalling pathway...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1010645431133
更新日期:2001-04-01 00:00:00
abstract::Three members have been isolated of an additional glutelin gene subfamily, named subfamily B, consisting of about five members per haploid rice genome. Restriction fragment length polymorphism analysis showed major differences between Japonica and Indica lines, indicating the divergence of the subfamily since the spli...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00037068
更新日期:1991-10-01 00:00:00
abstract::The nucleotide sequence of a cDNA prepared from poly(A)+ RNA from Lycopersicon esculentum fruit codes for a protein, M(r) 20,812, with features representative of the protein core of arabinogalactan proteins. The deduced amino acid sequence resembles that of peptides of arabinogalactan proteins isolated from carrot and...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00020254
更新日期:1995-05-01 00:00:00
abstract::Two types of structurally distinct O-methyltransferases mediate the methylation of hydroxylated monomeric lignin precursors in angiosperms. Caffeate 3-O-methyltransferase (COMT; EC 2.1.1.68) methylates the free acids and caffeoyl CoA 3-O-methyltransferase (CCoAOMT; EC 2.1.1.104) methylates coenzyme A esters. Recently,...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006244325250
更新日期:1999-07-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9448-8
更新日期:2009-04-01 00:00:00
abstract::Polyprotein-type precursors have been reported for the nuclear-encoded proteins such as the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and the apoproteins of light-harvesting chlorophyll-protein (LHC) in Euglena. We report here that the precursor of the extrinsic 30 kDa protein of photo...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00039627
更新日期:1993-01-01 00:00:00
abstract::Recent studies with dicot plants reveal that floral organ development is controlled by a group of regulatory factors containing the MADS domain. In this study, we have isolated and characterized a cDNA clone from rice, OsMADS1, which encodes a MADS-domain-containing protein. The OsMADS1 amino acid sequence shows 56.2%...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00013751
更新日期:1994-10-01 00:00:00
abstract:KEY MESSAGE:OsWRKY36 represses plant height and grain size by inhibiting gibberellin signaling. Plant height and grain size are important agronomic traits affecting yield in cereals, including rice. Gibberellins (GAs) are plant hormones that promote plant growth and developmental processions such as stem elongation and...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-020-01049-0
更新日期:2020-11-01 00:00:00
abstract::Alternatively spliced introns are the ones that are usually spliced but can be occasionally retained in a transcript isoform. They are the most frequently used alternative splice form in plants (~50% of alternative splicing events). Chlamydomonas reinhardtii, a unicellular alga, is a good model to understand alternati...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-017-0605-9
更新日期:2017-06-01 00:00:00
abstract::Differential screening of cDNA libraries of unfertilized egg cells and in vitro zygotes of maize resulted in the isolation of more than 50 different genes whose expression is up- or down-regulated after in vitro fertilization (IVF). Among these genes, we identified a cDNA encoding the eukaryotic translation initiation...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006176819213
更新日期:1999-03-01 00:00:00
abstract:KEY MESSAGE:Jasmonic acid and RAP2.6L are induced upon wounding but are not involved in cell proliferation during healing in Arabidopsis hypocotyls. Plants produce jasmonic acid in response to wounding, but its role in healing, if any, has not been determined. Previously, the jasmonic acid-induced transcription factor,...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-018-0702-4
更新日期:2018-04-01 00:00:00
abstract::The immunoscreening method was used to isolate cDNAs of 1323 bp (ClOCT1) and 1433 bp (ClOCT2) encoding two ornithine carbamoyltransferases (OCT, EC 2.1.3.3) from the cDNA expression library of Canavalia lineata leaves constructed in a lambdaZAP Express vector. ClOCT1 and ClOCT2 encode 359 and 369 amino acids, respecti...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1011632927541
更新日期:2001-08-01 00:00:00
abstract::We have identified 39 Arabidopsis thaliana ESTs encoding germin-like proteins (GLPs) and have completely sequenced 25 of these cDNAs. Our analysis demonstrates that the Arabidopsis genome contains a gene family with at least 12 GLP genes. Comparisons with other known germins and germin-like proteins indicate that thes...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1006038117130
更新日期:1998-12-01 00:00:00
abstract::To isolate genes which are expressed preferentially during embryogenesis, a Douglas-fir embryogenesis cDNA library was constructed and differentially screened with cDNA probes made with mRNA from developing and mature embryos, respectively. The cDNA clone PM 2.1 was isolated based on its abundance in developing seeds ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005839832096
更新日期:1997-05-01 00:00:00
abstract::Transformed clones from a shooty tobacco crown gall tumor, induced byAgrobacterium tumefaciens strain LBA1501, having the auxin locus of the TL-region inactivated by a Tn1831 insertion, were investigated for their T-DNA structure and expression. It has been described previously (28) that in addition to clones with an ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00752901
更新日期:1986-07-01 00:00:00
abstract::Chloroplast and cytosolic triosephosphate isomerases from spinach were separated and purified to homogeneity. Both enzymes were partially sequenced by Edman degradation. Using degenerate primers designed against the amino acid sequences, a homologous probe for the chloroplast enzyme was amplified and used to isolate s...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00019506
更新日期:1994-12-01 00:00:00
abstract:KEY MESSAGE:This manuscript describes the functions of an Argonaute protein named AGO17 in rice. AGO17 is required for the development of rice reproductive tissues. Argonaute (AGO) proteins are a well-conserved multigene family of regulators mediating gene silencing across eukaryotes. Monocot plants have additional mem...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-020-01071-2
更新日期:2021-01-01 00:00:00
abstract::The single-copy gene encoding the Arabidopsis HMG-I/Y protein was isolated and characterised. The gene encodes a protein of 204 amino acid residues and contains a single intron of 73 bp. Primer extension analysis indicates that transcription starts 115 bp upstream of the translation start and the leader sequence conta...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1023/a:1005928219895
更新日期:1998-04-01 00:00:00
abstract::The Arabidopsis genome contains 10 genes belonging to the HD-Zip II family including ATHB2 and HAT2. Previous work has shown that ATHB2 is rapidly and strongly induced by light quality changes that provoke the shade avoidance response whereas HAT2 expression responds to auxin. Here, we present a genome-wide analysis o...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9383-8
更新日期:2008-11-01 00:00:00
abstract::It has been known for more than a decade that increasing the gene copy number does not necessarily lead to increased gene activity. Plants have developed efficient mechanisms such as post-transcriptional gene silencing (PTGS) to regulate abnormal gene expression in a sequence-specific fashion. PTGS of (trans)genes can...
journal_title:Plant molecular biology
pub_type: 杂志文章,评审
doi:10.1023/a:1006499832424
更新日期:2000-06-01 00:00:00
abstract::The constituents of plasma membrane proteins, particularly the integral membrane proteins, are closely associated with the differentiation of plant cells. Secondary vascular differentiation, which gives rise to the increase in plant stem diameter, is the key process by which the volume of the plant body grows. However...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-011-9771-3
更新日期:2011-05-01 00:00:00
abstract::The intrinsic chlorophyll-protein CP 47 is a component of photosystem II which functions in both light-harvesting and oxygen evolution. The large extrinsic loop E of this protein has been shown to interact with the oxygen-evolving site. Previously, Vermaas and coworkers have produced a number of deletions within loop ...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00041405
更新日期:1996-12-01 00:00:00
abstract::Hevea brasiliensis, being the only source of commercial natural rubber, is an extremely economically important crop. In an effort to facilitate biological, biochemical and molecular research in rubber biosynthesis, here we report the use of next-generation massively parallel sequencing technologies and de novo transcr...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-011-9811-z
更新日期:2011-10-01 00:00:00
abstract::H(+)-ATPase cDNAs were identified in a potato leaf library using an Arabidopsis gene as a probe. Based on their sequences, the clones could be grouped into at least two classes. A similar classification was obtained from the analysis of sequence data from four tobacco genes. Both potato genes are expressed in all tiss...
journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/BF00028864
更新日期:1994-11-01 00:00:00
abstract:KEY MESSAGE:This review contains functional roles of MYB transcription factors in the transcriptional regulation of anthocyanin biosynthesis in horticultural plants. This review describes potential uses of MYB TFs as tools for metabolic engineering for anthocyanin production. Anthocyanins (ranging from red to blue) are...
journal_title:Plant molecular biology
pub_type: 杂志文章,评审
doi:10.1007/s11103-018-0771-4
更新日期:2018-09-01 00:00:00