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13 výsledky
Effect of Wound Position, Auxin, and Agrobacterium vitis Strain F2/5 on Wound Healing and Crown Gall in Grapevine.
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ABSTRACT Agrobacterium vitis is the causal agent of crown gall disease in grapevine, which can be severe in many regions worldwide. Vitis vinifera cultivars are highly susceptible to freeze injury, providing the wounds necessary for infection by A. vitis. Wound position in relation to the uppermost
Homologues of the Arabidopsis thaliana SHI/STY/LRP1 genes control auxin biosynthesis and affect growth and development in the moss Physcomitrella patens.
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The plant hormone auxin plays fundamental roles in vascular plants. Although exogenous auxin also stimulates developmental transitions and growth in non-vascular plants, the effects of manipulating endogenous auxin levels have thus far not been reported. Here, we have altered the levels and sites of
Shoot tip necrosis of in vitro plant cultures: a reappraisal of possible causes and solutions
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Shoot tip necrosis is a physiological condition that negatively impacts the growth and development of in vitro plant shoot cultures across a wide range of species. Shoot tip necrosis is a physiological condition and disorder that can arise in plantlets or shoots in vitro that results in death of the
Cell shape can be uncoupled from formononetin induction in a novel cell line from Callerya speciosa.
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UNASSIGNED
It is the first time that formononetin produced by cell culture and its accumulation was shown to be triggered by specific stress signalling linked jasmonate pathway. Callerya speciosa, an endangered traditional Chinese medicine plant, is intensively used in traditional folk medicine. To
Knock-down of δ-aminolevulinic acid dehydratase via virus-induced gene silencing alters the microRNA biogenesis and causes stress-related reactions in citrus plants
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The δ-aminolevulinic acid (δ-ALA) is an intermediate in the biosynthetic pathway of tetrapyrroles. Tetrapyrroles play vital roles in many biological processes such as photosynthesis, respiration, and light-sensing. ALA-dehydratase (ALAD) combines two molecules of δ-ALA to form porphobilinogen. In
Cupin: a candidate molecular structure for the Nep1-like protein family.
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BACKGROUND
NEP1-like proteins (NLPs) are a novel family of microbial elicitors of plant necrosis. Some NLPs induce a hypersensitive-like response in dicot plants though the basis for this response remains unclear. In addition, the spatial structure and the role of these highly conserved proteins are
Physical, Chemical, Developmental, and Genetic Factors that Modulate the Agrobacterium-Vitis Interaction.
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Tumor formation in Vitis species and hybrids, incited by Agrobacterium tumefaciens, was altered by chemical, physical, developmental, and genetic variables. Knowledge of the effect of these variables was used to develop a stringent in vitro assay system to select parents for a study of genetic
T-DNA genes responsible for inducing a necrotic response on grape vines.
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Agrobacterium tumefaciens supervirulent strain A281 induces a progressive necrotic response, rather than tumor formation, when inoculated on stems of several grape cultivars. The Ti plasmid, and specifically its T-DNA, is required for the process. In the present study, 40 T-DNA insertion mutants of
Subacute skeletal myopathy induced by 2,4-dichlorophenoxyacetate in rats and guinea pigs.
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Rats and guinea pigs were injected with 2,4-dichlorophenoxyacetate (2,4-D) in amounts sufficient to keep them myotonic for over 12 hr daily. The biceps brachii muscles were studied by histochemistry, epoxy resin histology, and electron microscopy after one to five days. Changes observed include
Gain of function assays identify non-rol genes from Agrobacterium rhizogenes TL-DNA that alter plant morphogenesis or hormone sensitivity.
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This study tested the morphogenetic potential of 15 open reading frames of the TL-DNA of Agrobacterium rhizogenes strain HRI. These open reading frames were expressed individually under the control of the 35S RNA promoter in transgenic tobacco plants (Nicotiana tabacum L.). Expression of three T-DNA
AtNSE1 and AtNSE3 are required for formation of embryo pattern and maintenance of cell viability during Arabidopsis embryogenesis.
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Embryogenesis is an essential process during seed development in higher plant. Our previous work has showed that mutations of AtNSE1 or AtNSE3 would lead to early embryo abortion, and their proteins could interact with each other directly. However, the crucial regions of these proteins in this
A genome survey of Moniliophthora perniciosa gives new insights into Witches' Broom Disease of cacao.
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BACKGROUND
The basidiomycete fungus Moniliophthora perniciosa is the causal agent of Witches' Broom Disease (WBD) in cacao (Theobroma cacao). It is a hemibiotrophic pathogen that colonizes the apoplast of cacao's meristematic tissues as a biotrophic pathogen, switching to a saprotrophic lifestyle
Expression of antisense chalcone synthase RNA in transgenic hybrid walnut microcuttings. Effect on flavonoid content and rooting ability.
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Walnut somatic embryos (Juglans nigra x Juglans regia) were transformed with a vector containing a neomycin phosphotransferase II, a beta-glucuronidase and an antisense chalcone synthase (chs) gene. This antisense construct included a 400 bp cDNA fragment of a walnut chs gene under the control of
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