Transgenic sterility in Populus: expression properties of the poplar PTLF, Agrobacterium NOS and two minimal 35S promoters in vegetative tissues.
Identifieur interne : 003C95 ( Main/Exploration ); précédent : 003C94; suivant : 003C96Transgenic sterility in Populus: expression properties of the poplar PTLF, Agrobacterium NOS and two minimal 35S promoters in vegetative tissues.
Auteurs : Hao Wei [États-Unis] ; Richard Meilan ; Amy M. Brunner ; Jeffrey S. Skinner ; Caiping Ma ; Steven H. StraussSource :
- Tree physiology [ 0829-318X ] ; 2006.
Descripteurs français
- KwdFr :
- Alignement de séquences (MeSH), Amino-acid oxidoreductases (génétique), Caulimovirus (génétique), Données de séquences moléculaires (MeSH), Feuilles de plante (génétique), Fleurs (génétique), Fécondité (génétique), Glucuronidase (génétique), Glucuronidase (métabolisme), Populus (génétique), Protéines de fusion recombinantes (génétique), Protéines de fusion recombinantes (métabolisme), Protéines végétales (génétique), Racines de plante (génétique), Rhizobium (génétique), Régions promotrices (génétique) (génétique), Régulation de l'expression des gènes végétaux (MeSH), Séquence nucléotidique (MeSH), Vecteurs génétiques (génétique), Végétaux génétiquement modifiés (MeSH).
- MESH :
- génétique : Amino-acid oxidoreductases, Caulimovirus, Feuilles de plante, Fleurs, Fécondité, Glucuronidase, Populus, Protéines de fusion recombinantes, Protéines végétales, Racines de plante, Rhizobium, Régions promotrices (génétique), Vecteurs génétiques.
- métabolisme : Glucuronidase, Protéines de fusion recombinantes.
- Alignement de séquences, Données de séquences moléculaires, Régulation de l'expression des gènes végétaux, Séquence nucléotidique, Végétaux génétiquement modifiés.
English descriptors
- KwdEn :
- Amino Acid Oxidoreductases (genetics), Base Sequence (MeSH), Caulimovirus (genetics), Fertility (genetics), Flowers (genetics), Gene Expression Regulation, Plant (MeSH), Genetic Vectors (genetics), Glucuronidase (genetics), Glucuronidase (metabolism), Molecular Sequence Data (MeSH), Plant Leaves (genetics), Plant Proteins (genetics), Plant Roots (genetics), Plants, Genetically Modified (MeSH), Populus (genetics), Promoter Regions, Genetic (genetics), Recombinant Fusion Proteins (genetics), Recombinant Fusion Proteins (metabolism), Rhizobium (genetics), Sequence Alignment (MeSH).
- MESH :
- chemical , genetics : Amino Acid Oxidoreductases, Glucuronidase, Plant Proteins, Recombinant Fusion Proteins.
- genetics : Caulimovirus, Fertility, Flowers, Genetic Vectors, Plant Leaves, Plant Roots, Populus, Promoter Regions, Genetic, Rhizobium.
- chemical , metabolism : Glucuronidase, Recombinant Fusion Proteins.
- Base Sequence, Gene Expression Regulation, Plant, Molecular Sequence Data, Plants, Genetically Modified, Sequence Alignment.
Abstract
Transgenic sterility is a desirable trait for containment of many kinds of transgenes and exotic species. Genetically engineered floral sterility can be imparted by expression of a cytotoxin under the control of a predominantly floral-tissue-specific promoter. However, many otherwise desirable floral promoters impart substantial non-floral expression, which can impair plant health or make it impossible to regenerate transgenic plants. We are therefore developing a floral sterility system that is capable of attenuating undesired background vegetative expression. As a first step towards this goal, we compared the vegetative expression properties of the promoter of the poplar (Populus trichocarpa Torr. & Gray) homolog of the floral homeotic gene LEAFY (PTLF), which could be used to impart male and female flower sterility, to that of three candidate attenuator-gene promoters: the cauliflower mosaic virus (CaMV) 35S basal promoter, the CaMV 35S basal promoter fused to the TMV omega element and the nopaline synthase (NOS) promoter. The promoters were evaluated via promoter::GUS gene fusions in a transgenic poplar hybrid (Populus tremula L. x P. alba L.) by both histochemical and fluorometric GUS assays. In leaves, the NOS promoter conveyed the highest activity and had a mean expression level 5-fold higher than PTLF, whereas the CaMV 35S basal promoter fused to the omega element and the CaMV 35S basal promoter alone directed mean expression levels that were 0.5x and 0.35x that of PTLF, respectively. Differential expression in shoots, leaves, stems and roots was observed only for the NOS and PTLF promoters. Strongest expression was observed in roots for the NOS promoter, whereas the PTLF promoter directed highest expression in shoots. The NOS promoter appears best suited to counteract vegetative expression of a cytotoxin driven by the PTLF promoter where 1:1 toxin:attenuator expression is required.
DOI: 10.1093/treephys/26.4.401
PubMed: 16414919
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Caulimovirus (genetics)</term>
<term>Fertility (genetics)</term>
<term>Flowers (genetics)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Genetic Vectors (genetics)</term>
<term>Glucuronidase (genetics)</term>
<term>Glucuronidase (metabolism)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Plant Leaves (genetics)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Roots (genetics)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Populus (genetics)</term>
<term>Promoter Regions, Genetic (genetics)</term>
<term>Recombinant Fusion Proteins (genetics)</term>
<term>Recombinant Fusion Proteins (metabolism)</term>
<term>Rhizobium (genetics)</term>
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<term>Amino-acid oxidoreductases (génétique)</term>
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<term>Données de séquences moléculaires (MeSH)</term>
<term>Feuilles de plante (génétique)</term>
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<term>Fécondité (génétique)</term>
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<term>Plant Leaves</term>
<term>Plant Roots</term>
<term>Populus</term>
<term>Promoter Regions, Genetic</term>
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<term>Fécondité</term>
<term>Glucuronidase</term>
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<front><div type="abstract" xml:lang="en">Transgenic sterility is a desirable trait for containment of many kinds of transgenes and exotic species. Genetically engineered floral sterility can be imparted by expression of a cytotoxin under the control of a predominantly floral-tissue-specific promoter. However, many otherwise desirable floral promoters impart substantial non-floral expression, which can impair plant health or make it impossible to regenerate transgenic plants. We are therefore developing a floral sterility system that is capable of attenuating undesired background vegetative expression. As a first step towards this goal, we compared the vegetative expression properties of the promoter of the poplar (Populus trichocarpa Torr. & Gray) homolog of the floral homeotic gene LEAFY (PTLF), which could be used to impart male and female flower sterility, to that of three candidate attenuator-gene promoters: the cauliflower mosaic virus (CaMV) 35S basal promoter, the CaMV 35S basal promoter fused to the TMV omega element and the nopaline synthase (NOS) promoter. The promoters were evaluated via promoter::GUS gene fusions in a transgenic poplar hybrid (Populus tremula L. x P. alba L.) by both histochemical and fluorometric GUS assays. In leaves, the NOS promoter conveyed the highest activity and had a mean expression level 5-fold higher than PTLF, whereas the CaMV 35S basal promoter fused to the omega element and the CaMV 35S basal promoter alone directed mean expression levels that were 0.5x and 0.35x that of PTLF, respectively. Differential expression in shoots, leaves, stems and roots was observed only for the NOS and PTLF promoters. Strongest expression was observed in roots for the NOS promoter, whereas the PTLF promoter directed highest expression in shoots. The NOS promoter appears best suited to counteract vegetative expression of a cytotoxin driven by the PTLF promoter where 1:1 toxin:attenuator expression is required.</div>
</front>
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<Abstract><AbstractText>Transgenic sterility is a desirable trait for containment of many kinds of transgenes and exotic species. Genetically engineered floral sterility can be imparted by expression of a cytotoxin under the control of a predominantly floral-tissue-specific promoter. However, many otherwise desirable floral promoters impart substantial non-floral expression, which can impair plant health or make it impossible to regenerate transgenic plants. We are therefore developing a floral sterility system that is capable of attenuating undesired background vegetative expression. As a first step towards this goal, we compared the vegetative expression properties of the promoter of the poplar (Populus trichocarpa Torr. & Gray) homolog of the floral homeotic gene LEAFY (PTLF), which could be used to impart male and female flower sterility, to that of three candidate attenuator-gene promoters: the cauliflower mosaic virus (CaMV) 35S basal promoter, the CaMV 35S basal promoter fused to the TMV omega element and the nopaline synthase (NOS) promoter. The promoters were evaluated via promoter::GUS gene fusions in a transgenic poplar hybrid (Populus tremula L. x P. alba L.) by both histochemical and fluorometric GUS assays. In leaves, the NOS promoter conveyed the highest activity and had a mean expression level 5-fold higher than PTLF, whereas the CaMV 35S basal promoter fused to the omega element and the CaMV 35S basal promoter alone directed mean expression levels that were 0.5x and 0.35x that of PTLF, respectively. Differential expression in shoots, leaves, stems and roots was observed only for the NOS and PTLF promoters. Strongest expression was observed in roots for the NOS promoter, whereas the PTLF promoter directed highest expression in shoots. The NOS promoter appears best suited to counteract vegetative expression of a cytotoxin driven by the PTLF promoter where 1:1 toxin:attenuator expression is required.</AbstractText>
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<name sortKey="Meilan, Richard" sort="Meilan, Richard" uniqKey="Meilan R" first="Richard" last="Meilan">Richard Meilan</name>
<name sortKey="Skinner, Jeffrey S" sort="Skinner, Jeffrey S" uniqKey="Skinner J" first="Jeffrey S" last="Skinner">Jeffrey S. Skinner</name>
<name sortKey="Strauss, Steven H" sort="Strauss, Steven H" uniqKey="Strauss S" first="Steven H" last="Strauss">Steven H. Strauss</name>
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<country name="États-Unis"><region name="Oregon"><name sortKey="Wei, Hao" sort="Wei, Hao" uniqKey="Wei H" first="Hao" last="Wei">Hao Wei</name>
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{{Explor lien |wiki= Bois |area= PoplarV1 |flux= Main |étape= Exploration |type= RBID |clé= pubmed:16414919 |texte= Transgenic sterility in Populus: expression properties of the poplar PTLF, Agrobacterium NOS and two minimal 35S promoters in vegetative tissues. }}
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