(PDF) THE EFFECT OF PLANT GROWTH HORMONES (AUXINS AND CYTOKININS…
Determination of the most ... The media containing the highest plant growth regulators concentration (that is, 0.5 mg L⁻¹ NAA and 6 mg L⁻¹ BAP) resulted in the highest phenol content ...
Auxin: regulation, action, and interaction
Background: The phytohormone auxin is critical for plant growth and orchestrates many developmental processes. Scope: This review considers the complex array of mechanisms plants use to control auxin levels, the movement of auxin through the plant, the emerging view of auxin-signalling mechanisms, and several interactions between auxin and other …
Serotonin in Plant Signalling and Communication | SpringerLink
Auxin has an important role in regulating the development of root system in plants (Mähönen et al. 2014; Silva-Navas et al. 2016), and maintaining maximal accumulation of auxin in the quiescent centre and its steep gradient in the meristematic zone is critical for normal root growth as well as meristem cell activity (Liu et al. 2016 ...
Regulation of Phytohormones on the Growth and Development of Plant …
The regulation of auxin on the growth and development of root hair is regulated by auxin metabolism and polar auxin transport, which controls the local auxin level and forms a concentration gradient. The formation of this auxin concentration gradient is the main mechanism involved in regulating many life activities ( Marchant et al., 2002 ; Cho ...
Enhancing auxin accumulation in maize root tips improves root growth
The alteration of the local auxin concentration boosted root growth and phenotypic modification. Changes in the transcriptome by altering ZmPIN1a expression. A genome‐wide ... S. (2006) ZmPIN1a and ZmPIN1b encode two novel putative candidates for polar auxin transport and plant architecture determination of maize. Plant Physiol. 142, …
Plants | Free Full-Text | Auxin: Hormonal Signal …
The production of viable seeds is a key event in the life cycle of higher plants. Historically, abscisic acid (ABA) and gibberellin (GAs) were considered the main hormones that regulate seed formation. However, …
Current analytical methods for plant auxin quantification--A review
Abstract Plant hormones, and especially auxins, are low molecular weight compounds highly involved in the control of plant growth and development. Auxins are …
Current analytical methods for plant auxin quantification – A …
The goal of this review is to summarize the recent advances (since 2000) in analytical methods for the quantification of two naturally occurring auxins, IAA and indole-3-butyric acid (IBA) in plant tissues. Analytical methods for auxin quantification. …
Into the Seed: Auxin Controls Seed Development and Grain Yield …
Seed development, which involves mainly the embryo, endosperm and integuments, is regulated by different signaling pathways, leading to various changes in seed size or seed weight. Therefore, uncovering the genetic and molecular mechanisms of seed development has great potential for improving crop yields. The phytohormone …
Molecular Mechanisms of Diverse Auxin Responses during Plant …
The plant hormone auxin acts as a signaling molecule to regulate numerous developmental processes throughout all stages of plant growth. Understanding how …
Concentration difference of auxin involved in stem development in
The concentration of auxin, involved in cell proliferation, has been well-documented in pea, Arabidopsis, and rice (Ross 1998; Esmon et al. 2006; Fig. 3 Dynamics of identified metabolites related to flavonoid synthesis pathway. ... Effects of auxin transport inhibitors on gibberellins in pea. Journal of Plant Growth Regulation, 17, 141â ...
Roles of Auxin in the Growth, Development, and Stress …
Auxin, a plant hormone, regulates virtually every aspect of plant growth and development. Many current studies on auxin focus on the model plant Arabidopsis …
A high-throughput method for the quantitative analysis of auxins
This protocol is for the precise, high-throughput determination of free IAA in plant tissue by isotope dilution analysis using gas chromatography-mass spectrometry (GC-MS). The steps described are ...
Strigolactones' Effect on Root Growth and Root-Hair
suggest that strigolactones affect auxin-efflux carriers, thereby regulating auxin flux from root cells. However, there may be more than one mechanism governing strigo-lactones' influence on root growth. Materials and Methods Plant Material and Growth Conditions Tomato (Solanum lycopersicon) cv. M82 (Eshed and others
Auxin efflux carrier
Background Auxin plays a crucial role in nitrate (NO3–)-mediated root architecture, and it is still unclear that if NO3– supply modulates auxin reallocation for regulating root formation in maize (Zea mays L.). This study was conducted to investigate the role of auxin efflux carrier ZmPIN1a in the root formation in response to NO3– …
A high-throughput method for the quantitative analysis of auxins
Auxin measurements in plants are critical to understanding both auxin signaling and metabolic homeostasis. The most abundant natural auxin is indole-3 …
Protocol: High-throughput and quantitative assays of auxin and …
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 …
Auxin flow-mediated competition between axillary buds to
Bangerth, F. Response of cytokinin concentration in the xylem exudate of bean (Phaseolus vulgaris L.) plants to decapitation and auxin treatment, and relationship to apical dominance. Planta 194 ...
Current analytical methods for plant auxin quantification – A …
Auxins are indolic acids distinguishable by a variable side chain (see Fig. 1). One of the main obstacles to auxin quantification is the low endogenous concentration …
Auxin Response Factors Are Ubiquitous in Plant Growth and
Auxin response factors (ARFs) are an important family of transcription factors involved in the exertion of auxin in plants and play a key role in regulating the growth and development of plant nutritional and reproductive organs such as roots, stems, leaves, flowers, fruits, and seeds. Foods of plant origin occupy an important place in the …
Role of Auxin, pH, and Stress in the Activation of Embryogenic …
Auxin is considered to be the most important plant growth regulator in relation to cell division and differentiation, as well as in the induction of somatic embryogenesis. 2,4-D, an auxin analog herbicide, is especially effective in this latter process. Many in vitro somatic embryogenesis systems rely on the use of exogenous 2,4 …
History, synthesis, transport, determination, metabolism, …
The word auxin has a Greek origin: auxein means to enlarge or to grow. Auxins are an important category of plant hormones, regulating many aspects of plant growth and development throughout the ...
Rapid Determination of Cytokinins and Auxin in Cyanobacteria
Cytokinins and auxins are classes of phytohormones that play vital roles in controlling growth and development not only in plants, but also in other organisms including cyanobacteria [18, 26].Naturally occurring cytokinins are adenine derivatives substituted at the N 6 position by isoprenoid side chain or an isoprenoid ring [].The most …
Spatial specificity of auxin responses coordinates …
Indeed, direct auxin measurements in Populus and Pinus trees showed that the concentration of the major endogenous auxin indole-3-acetic acid (IAA) peaks in the centre of the cambial zone and ...
Analytical Determination of Auxins and Cytokinins
Analytical Determination of Auxins and Cytokinins. 2017;1569:31-39. doi: 10.1007/978-1-4939-6831-2_2. 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 ...
Auxin-Dependent Cell Division and Cell Elongation. 1 …
Plant growth and morphogenesis are under the control of both environmental stimuli and endogenous developmental programs. In both cases, plant hormones coordinate adaptive changes in cellular division and differentiation. ... (1:1 w/w ratio of NAA and 2,4-D for a total auxins concentration of 10 ... Determination of Cell Viability and Division.
Q&A: Auxin: the plant molecule that influences almost anything
Auxin is an essential molecule that controls almost every aspect of plant development. Although the core signaling components that control auxin response are well characterized, the precise mechanisms enabling specific responses are not yet fully understood. Considering the significance of auxin in plant growth and its potential …
16.5B: Auxin
Auxins are plant hormones. The most important auxin produced by plants is indole-3-acetic acid (IAA). ... Gravitropism is a plant growth response to gravity. Plant shoots display negative gravitropism: ... a gradient of auxin concentration develops highest at the tip promoting the production of new cells at the meristem, and lowest in the ...
Auxin and cytokinin control fate determination of cotyledons in the …
The effect of auxin on the fate determination of the cotyledons was investigated using this lanolin paste experimental system. ... This suggests that the microcotyledon fate is induced when auxin concentration in the cotyledon is higher than the other cotyledon but not when absolute auxin concentration exceed a certain threshold ...
Endogenous auxins in plant growth-promoting Cyanobacteria—
The retention times of each auxin were 5.287, 6.990, and 9.127 min for IAA, IPA, and IBA, respectively. The reproducibility of the retention times of the three auxins in this condition was investigated with doing repeated injections (n = 5) of the standard mixture at the concentration of 100 ng mL −1.The relative standard deviations (RSDs) of the …