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Showing 1 to 20 of 53 for “"Plant hormone"”.
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Computational investigation of molecular recognition in plant hormone signal transduction
Plant hormones are small molecules derived from natural metabolites that regulate plant growth, development and responses to biotic and abiotic stresses. There are nine major classes of plant hormones that have been identified, including abscisic acid, auxin, brassinosteroid, cytokinin, ethylene, …
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Understanding the protein complexes involved in the reception of the plant hormone Strigolactone
Strigolactones (SLs) are a class of plant hormone that regulate the development of branching in plants. In petunia, SL is perceived by its receptor, DAD2, an α/β hydrolase fold protein. This receptor also functions as a slow enzyme that hydrolyses SL into two non-active by-products. The hydrolytic …
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Esi47, a stress-inducible protein kinase gene from Lophopyrum elongatum is involved in plant hormone signaling
… this group has been implicated to be involved in plant signaling pathways except for the Arabidopsis gene ARSK1 , which has only been shown to be inducible by salt stress and ABA in plant roots (Hwang and Goodman, 1995). The protein phosphorylation activity of the Esi47 gene product was …
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Assessment of plant hormone quantification as a new physiological trait for crop breeding using a new classification method for crop performance under drought
… a key opportunity to test whether a stress hormone and/or hormone balance (ABA, ethylene and/or ABA/ethylene) could be used as a physiological trait for breeding for abiotic stress resilience. Due to the complexity of spatial and temporal variation of hormone accumulation (ABA and ethylene) …
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Auxin and the nodule
… this work we aim to characterise the role of the plant hormone auxin in the development of nitrogen-fixing, indeterminate legume nodules. More specifically we want to know the timing of, and the processes responsible for, the auxin signaling induction detected upon inoculation of the root of …
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Structure and Mechanism of Hormone Perception and Signal Transduction by Abscisic Acid Receptors
Abscisic acid (ABA) is a vital plant hormone that confers abiotic stress tolerance. ABA acts through inhibition of certain members of the type 2C protein phosphatase (PP2C), resulting in activation of the SNF1-related kinases (SnRKs) that positively transduce the ABA signal. The identity of ABA …
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Characterization of the Pathway Leading to the Synthesis of Salicylic Acid in Plants Resisting Pathogen Infection.
<p>Salicylic acid is a plant hormone that accumulates with plant-pathogen interaction. This accumulation corresponds to the plant being resistant to infection and without it the plant is susceptible. In this study, primers of genes involved in the normal synthesis of SA were used in RT-PCR to …
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Detection of trace concentrations of small and big molecules through vibrational spectroscopy
… spectroscopy. We analyzed zeatin, a small plant hormone (219 Da), and hemoglobin (Hb), a large protein (64,500 Da). Zeatin detection ranged from 1 mM to 1 nM, even in complex bacterial media, while Hb detection involved ligand-functionalized substrates targeting the heme group for specific …
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Characterization of the Arabidopsis thaliana Auxin F-Box Family Members AFB4 and AFB5
… throughout eukaryotic cells, including the model plant Arabidopsis thaliana. In Arabidopsis many growth and developmental process are influenced by the plant hormone auxin. Transcription factors involved in auxin response have been shown to be targets for ubiquitination and subsequent degradation. …
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The growth promoting effect of 2,4-Dichlorophenoxyacetic acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) on Microcystis aeruginosa
… clogging of filter systems in water treatment plants, taste and odor problems, and death of cattle and water fowl via extracellular polypeptides. Blooms of this nuisance alga have historically occurred in waters receiving pollution from sewage effluents or runoff from agricultural lands. …
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Regulation of ethylene biosynthesis by mitogen-activated protein kinase cascades in Arabidopsis
… a simple gaseous hydrocarbon, is an important plant hormone that has profound effects on plant growth, development, and response to environmental stimuli. Ethylene induces the ripening of climacteric fruits, which is characterized by a steep increase in ethylene synthesis at the mature stage. …
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Functionalization and applications of carbon nanotubes
… In Chapter 6, we describe a sensor for the plant hormone ethylene. The sensor is based on SWCNTs that are non-covalently functionalized with a copper complex. The device shows good sensitivity and selectivity for ethylene and could be useful in the horticultural industries.
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Agent Based Modelling of Auxin Transport Canalisation
The transport of the plant hormone auxin is central to many aspects of plant development. This thesis describes work developing agent-based simulations of auxin transport canalisation. Auxin transport canalisation is the dominant theory describing how auxin promotes its own transport through a …
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Investigating the Roles of Three Aintegumenta-Like Genes In Maintenance of Arabidopsis Shoot Meristem Activity
… structure at the shoot apex of higher plants, is established during development of the embryo. After germination, the indeterminate activity of the shoot apical meristem is responsible for the initiation of all aboveground parts of the plant. The shoot apical meristem continuously …
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Exploring the role of auxin in phenotypic plasticity in Arabidopsis thaliana root development
Auxin is a plant hormone that positively regulates the initiation and emergence of lateral roots. In this study we used several approaches to reduce auxin transport moving either from the shoot toward the root apex or from the root tip toward the base and examined the effect of these treatments on …
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The identification and characterisation of key genes involved in somatic embryogenesis in wheat (Triticum, aestivum L.)
One of the most remarkable aspects of plants cells is that on application of the plant hormone auxin, they possess the unique ability to de-differentiate and return to embryonic development, via a process known as `somatic embryogenesis' (SE). On removal of auxin these totipotent cells are then …
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I. Identification of thecis-regulatory elements of the Arabidopsis thaliana TCH3 gene. II. Developmental and molecular responses to touch stimulation in Arabidopsis mutants defective in ethylene responses
Plants respond to a variety of stimuli from their environment, including mechanical stimulation and changes in temperature or light. In Arabidopsis thaliana, morphological changes occur following touch stimulation, and this phenomenon is preceded by upregulation of expression of the TCH genes. The …
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The Physiological Impacts of Soil Alkalising Agents on Legumes.
… gas exchange is caused by an increase in the plant hormone abscisic acid (ABA) in response to a lime-induced phosphorus deficiency. When synthetic ABA was supplied to detached pea leaves at the same concentrations induced by liming, stomatal conductance decreased. Furthermore, the ABA …
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Protein- hormone interactions patterning the gynoecium
… the most intricately patterned organs of the plant, comprisingdifferent tissue sub-structures, all with the purpose of facilitating propagation to the next generation. It is therefore representative of the complexity involved in the initiation and establishment of organ patterning and presents …
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Azido Auxins: Synthesis and Use as Photoaffinity Labeling Agents
A technique to isolate auxin-binding proteins in plants was developed. Three analogs of indole-3-acetic acid, a natural plant hormone of the class called auxins, were synthesized by Dr. Lee Melhado to be used as photoaffinity labeling agents in plants. The analogs, 4-, 5-, and …
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