Auxins are a powerful growth hormone produced naturally by plants. They are found in shoot and root tips and promote cell division, stem and root growth. They can also drastically affect plant orientation by promoting cell division to one side of the plant in response to sunlight and gravity.
The temporal and spatial control of auxin distribution has a key role in the regulation of plant growth and development, and much has been learnt about the mechanisms that …
Its function is to promote the growth and development of plants, and they are usually found in the vigorous parts of plants, such as root tips and young parts. To promote plant growth, some artificial auxins are synthesized, such as indole propionic acid (IPA), 1-naphthyl acetic acid (NAA), and 2-naphthoxyacetic acid (2-NOA).
The phytohormone auxin has long been recognized for its essential role in plant growth and development. Recent advance indicated that auxin also plays critical roles in plant responses to environmental stresses. This has prompted investigation into molecular control of auxin homeostasis and plant growth in response to developmental …
Auxin belongs among major phytohormones and governs multiple aspects of plant growth and development. The establishment of auxin concentration gradients, determines, among other processes, plant organ positioning and growth responses to environmental stimuli.Herein we report the synthesis of new NBD- or DNS-labelled IAA …
Abstract A method is described for the measurement of auxin-induced H + -efflux from small populations of Avena coleoptile segments. The method allows the simultaneous investigation of the kinetics of rapid auxin responses over a wide concentration range. IAA promoted linear rates of H + -efflux and the change in amplitude of response occurred …
Plant hormones, and especially auxins, are low molecular weight compounds highly involved in the control of plant growth and development. Auxins are also broadly used in horticulture, as part of vegetative plant propagation protocols, allowing the cloning of genotypes of interest.
The significance of plant hormones including abscisic acid, ethylene, gibberellins, auxin, cytokinins and brassinosteroids, with reference to proteomic and molecular biology studies on germination, is also discussed. This review article contains almost a complete set of details, which may affect seed biology during dormancy and …
A method for separation and purification of plant hormones auxin and abscisic acid based on mixed mode reversed-phase anion-exchange solid phase extraction and two-dimensional HPLC was developed.
An auxin is a phytohormone derived from amino acid l -Tryptophan (TRP) known to regulate plant growth and development. Auxin is produced by plants and several microorganisms, especially rhizosphere bacteria.
However, they tend to be concentrated in the meristems, growth centers which are at the forefront of growth. These centers release auxin molecules, which are then distributed towards the roots. …
IAA, the most studied auxin, is extremely potent in controlling many aspects of plant growth and development, despite its relatively simple chemical structure. It controls cell division, cell expansion, and cell differentiation. It has a ubiquitous and context-dependent function, making it difficult to assign a single function to auxin.
Analysis of Plant Growth Substances (Auxins, Gibberelins and Cytokinins) in Vegetables Using High-Performance Liquid Chromatography Coupled to Electrospray Ionization Tandem Mass Spectrometry
Plants as well as microorganisms, including bacteria and fungi, produce indole-3-acetic acid (IAA). IAA is the most common plant hormone of the auxin class and it regulates various aspects of plant growth and development. Thus, research is …
In particular, we proposed a new hypothesis that the difference of auxin concentration and subsequent cytokinin concentration between the two cotyledons is important for the competition-like growth of the two cotyledons.
Also, soil organic matter displays like auxin activity, causing plant responses just like those produced by added auxins. Therefore, the inoculation of an auxin-producing PGPR on plants might cause a wide variety of responses, ranging from effective growth promotion to growth restriction, depending on the total auxin content in root tissue.
The effect of exogenously applied natural [indole-3-acetic acid (IAA), phenylacetic acid (PAA), indole-3-butyric acid (IBA)] and synthetic [1-naphthaleneacetic acid (NAA)] auxins on the growth and metabolism of green microalga Chlorella vulgaris was examined. Exogenous auxins acted in a concentration-dependent manner on algal …
The growth-inhibiting effects of indole-3-acetic acid (IAA) at high concentration and the synthetic auxins 7-chloro-3-methyl-8-quinolinecarboxylic acid (quinmerac), 2-methoxy-3,6-dichlorobenzoic acid (dicamba), 4-amino-3,6,6-trichloropicolinic acid (picloram), and naphthalene acetic acid, were investigated in cleavers ( Galium …
The plant hormone auxin acts as a signaling molecule to regulate numerous developmental processes throughout all stages of plant growth. Understanding how auxin regulates various physiological and developmental processes has been a hot topic and an intriguing field. Recent studies have unveiled more molecular details into how diverse …
Plant hormones, and especially auxins, are low molecular weight compounds highly involved in the control of plant growth and development. Auxins are also broadly used in horticulture, as part of vegetative plant propagation protocols, allowing the cloning of …
This study demonstrates the function of two MADS-box genes in secondary growth and reveals a molecular mechanism that modulates subcellular auxin homeostasis in the vascular cambium area, which in turn regulates cambium proliferation activity …
Parallel determination of auxin and cytokinin levels within plant organs and tissues represents an invaluable tool for studies of their physiological effects and mutual interactions. Thanks to their different chemical structures, auxins, cytokinins and their metabolites are often determined separately, using specialized procedures of sample ...
The increase in auxin in the root enabled the plant to allocate more carbohydrates to the roots, enhanced the growth of the root, and improved plant resistance to environmental stress.
Learn how auxin, a plant hormone, regulates growth, tropisms, fruit development, and more in this Biology LibreTexts chapter.
Auxins are a class of plant hormones that affect various aspects of plant development. Recent studies have identified certain F-box-domain proteins as auxin receptors that control auxin-regulated ...
Auxins are plant hormones that play a central role in controlling plant growth and development across different environmental conditions. Even at low concentrations, auxins can regulate gene expression through specific transcription factors and proteins that are modulated to environmental responses in the signalling cascade. …
Abstract. Auxins are plant hormones that play a central role in controlling plant growth and development across different environmental conditions. Even at low concentrations, auxins can regulate gene expression through specific transcription factors and proteins that are modulated to environmental responses in the signalling cascade.
The plant hormone auxin, indole-3-acetic acid (IAA), plays important roles in plant growth and development. The signaling response to IAA is largely dependent on the local …
Auxins are plant hormones that play a central role in controlling plant growth and development across different environmental conditions. Even at low concentrations, …
A novel sample preparation method for auxin analysis in plant samples was developed by vacuum microwave-assisted extraction (VMAE) followed by molecularly imprinted clean-up procedure. The method was based on two steps. In the first one, conventional solvent extraction was replaced by VMAE for extraction of auxins from …
Key message Cytokinins are a class of phytohormone that participate in the regulation of the plant growth, development, and stress response. In this review, the potential regulating mechanism during plant growth and stress response are discussed. Abstract Cytokinins are a class of phytohormone that participate in the regulation of plant growth, …
Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin in plant growth and development in this tutorial.
