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Journal articles on the topic 'Auxins'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Repar, J., S. Šućurović, K. Zahradka, D. Zahradka, and M. Ćurković-Perica. "Stress resistance of Escherichia coli and Bacillus subtilis is modulated by auxins." Canadian Journal of Microbiology 59, no. 11 (2013): 766–70. http://dx.doi.org/10.1139/cjm-2013-0266.

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Two bacterial species, Gram-negative Escherichia coli and Gram-positive Bacillus subtilis, were exposed to different auxins to examine possible effects of these substances on bacterial stress tolerance. Bacterial resistance to UV irradiation, heat shock, and streptomycin was assessed with and without previous exposure to the following auxins: indole-3-acetic acid (IAA), indole-3-butyric acid (IBA), and 1-naphthalene acetic acid (NAA). Escherichia coli and B. subtilis cultures pretreated with any of the 3 auxins survived UV irradiation better than the untreated cultures. Also, B. subtilis cultu

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2

Miskoski, Sandra, and Norman A. García. "Dark and photoinduced interactions between riboflavin and indole auxins." Collection of Czechoslovak Chemical Communications 56, no. 9 (1991): 1838–49. http://dx.doi.org/10.1135/cccc19911838.

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Interactions between riboflavin (RF) and indole auxins in the darkness and under conditions of irradiation with visible light were carried out. Dark complexation takes place in buffered (pH 7) aqueous solution. The association constants determined by static fluorescence quenching range from 70 to 150 mol-1 dm3. The complexation is significant at relatively high indole auxin concentrations (above 10-3 mol dm-3). It is governed by an additive effect of charge transfer, known for flavine-indole systems, and of the hydrophobic bond formation. The latter appears in the case of auxins as the driving

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3

Smolko, Ana, Jelena Repar, Marija Matković, et al. "Application of Long-Chained Auxin Conjugates Influenced Auxin Metabolism and Transcriptome Response in Brassica rapa L. ssp. pekinensis." International Journal of Molecular Sciences 25, no. 1 (2023): 447. http://dx.doi.org/10.3390/ijms25010447.

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Auxin amino acid conjugates are considered to be storage forms of auxins. Previous research has shown that indole-3-acetyl-L-alanine (IAA-Ala), indole-3-propionyl-L-alanine (IPA-Ala) and indole-3-butyryl-L-alanine (IBA-Ala) affect the root growth of Brassica rapa seedlings. To elucidate the potential mechanism of action of the conjugates, we treated B. rapa seedlings with 0.01 mM IAA-, IPA- and IBA-Ala and investigated their effects on the auxin metabolome and transcriptome. IBA-Ala and IPA-Ala caused a significant inhibition of root growth and a decrease in free IAA compared to the control an

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4

Hagen, G., and T. J. Guilfoyle. "Rapid induction of selective transcription by auxins." Molecular and Cellular Biology 5, no. 6 (1985): 1197–203. http://dx.doi.org/10.1128/mcb.5.6.1197-1203.1985.

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Nuclei isolated from excised soybean plumules that were treated with 2,4-dichlorophenoxyacetic acid (2,4-D) were active in transcription of four auxin-regulated genes or DNA sequences, which have been described previously (G. Hagen, A. Kleinschmidt, and T. Guilfoyle, Planta 162:147-153, 1984). The rates of transcription of the auxin-responsive sequences were 10- to 100-fold greater with nuclei isolated from auxin-treated plumules than with those from untreated plumules. The transcriptional response was also observed with hypocotyls of intact soybean seedlings and hypocotyl sections, as well as

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5

Hagen, G., and T. J. Guilfoyle. "Rapid induction of selective transcription by auxins." Molecular and Cellular Biology 5, no. 6 (1985): 1197–203. http://dx.doi.org/10.1128/mcb.5.6.1197.

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Nuclei isolated from excised soybean plumules that were treated with 2,4-dichlorophenoxyacetic acid (2,4-D) were active in transcription of four auxin-regulated genes or DNA sequences, which have been described previously (G. Hagen, A. Kleinschmidt, and T. Guilfoyle, Planta 162:147-153, 1984). The rates of transcription of the auxin-responsive sequences were 10- to 100-fold greater with nuclei isolated from auxin-treated plumules than with those from untreated plumules. The transcriptional response was also observed with hypocotyls of intact soybean seedlings and hypocotyl sections, as well as

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6

Khalid, Azeem, Shermeen Tahir, Muhammad Arshad, and Zahir Ahmad Zahir. "Relative efficiency of rhizobacteria for auxin biosynthesis in rhizosphere and non-rhizosphere soils." Soil Research 42, no. 8 (2004): 921. http://dx.doi.org/10.1071/sr04019.

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Biosynthesis of auxins in the rhizosphere of different crops may vary because of quantitative and qualitative variations in microbial population and root exudation. A laboratory study was conducted to assess in vitro auxin biosynthesis, and biosynthesis in rhizosphere and non-rhizosphere soils of different crops (maize, sorghum, mungbean, cotton). Soils were inoculated with selected rhizobacteria with and without the auxin precursor L-tryptophan (L-TRP). Auxins were detected by colourimetry as indole acetic acid equivalents and confirmed by high performance liquid chromatography. Results revea

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7

Akhiyarova, Guzel, Gyulnar Vafina, Dmitriy Veselov, and Guzel Kudoyarova. "Immunolocalization of Jasmonates and Auxins in Pea Roots in Connection with Inhibition of Root Growth under Salinity Conditions." International Journal of Molecular Sciences 24, no. 20 (2023): 15148. http://dx.doi.org/10.3390/ijms242015148.

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Inhibition of root elongation is an important growth response to salinity, which is thought to be regulated by the accumulation of jasmonates and auxins in roots. Nevertheless, the mechanisms of the interaction of these hormones in the regulation of the growth response to salinity are still not clear enough. Their better understanding depends on the study of the distribution of jasmonates and auxins between root cells. This was achieved with the help of immunolocalization of auxin (indoleacetic acid) and jasmonates on the root sections of pea plants. Salinity inhibited root elongation and decr

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8

Moncada, Alessandra, Filippo Vetrano, Alessandro Esposito, and Alessandro Miceli. "Effects of NAA and Ecklonia maxima Extracts on Lettuce and Tomato Transplant Production." Agronomy 12, no. 2 (2022): 329. http://dx.doi.org/10.3390/agronomy12020329.

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Ecklonia maxima and the commercial biostimulants produced from it contain various plant growth regulators that are responsible for the growth stimulation recorded in many crops. Auxins are one of the major plant growth regulators contained in E. maxima extracts. The aim of this research was to evaluate the growth-promoting effect of a seaweed extract from E. maxima on lettuce and tomato transplant production under nursery conditions, and to compare the effect of this extract with an equal concentration of synthetic auxin. Two doses of natural or synthetic exogenous auxins (50 or 100 μg L−1) we

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9

Yue, Wang, Sun Fulai, Gao Qingrong, Zhang Yanxia, Wang Nan, and Zhang Weidong. "Auxins Regulations of Branched Spike Development and Expression of TFL, a LEAFY-Like Gene in Branched Spike Wheat (Triticum aestivum)." Journal of Agricultural Science 9, no. 2 (2017): 27. http://dx.doi.org/10.5539/jas.v9n2p27.

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Branched spike wheat is a hexaploid germplasm with branched rachis on its main rachises, and the crucial period for branched rachises occurrence and development is just after the two ridges stage of shoot apex. Natural [indole-3-acetic acid (IAA), indole-3butyric acid (IBA)] and synthetic [(1-naphthaleneacetic acid (NAA), 2,4-Dichlorophenoxyacetic acid (2,4-D)] auxins were applied at this period to investigate the spike traits, seedling growth and photosynthesis related characters and expression of a putative homologue of the LEAFY in branched spike wheat. The four types of experienced auxins

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10

Timergalina, L. N., R. S. Ivanov, L. B. Vysotskaya, B. R. Kuluev, and G. V. Sharipova. "ROLE OF AUXINS AND THEIR TRANSPORTERS AT LOW LIGHT INTENSITY IN REGULATION OF WHEAT ROOT BRANCHING." ÈKOBIOTEH 6, no. 1 (2023): 76–80. http://dx.doi.org/10.31163/2618-964x-2023-6-1-76-80.

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Light is vital for any plant, so there are many mechanisms for adapting to its deficiency. For example, when shading by other plants, the stems are elongated due to the resources going to other organs, in particular, roots, the branching of which may decrease. The decrease in root branching under the influence of low light is explained by a decrease in auxin transport (IAA) from shoots to roots. However, data on the effect of low light on auxins is rather contradictory. The data obtained in this work indicate a decrease in the concentration of auxins in the roots and phloem exudate of plants a

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11

Singh, Sanjay, Pramod Kumar, and S. Ansari. "Clonal Propagation of Teak (Tectona grandis) by compositive treatment of Auxin with Thaimine." Indian Journal of Forestry 28, no. 2 (2005): 108–11. http://dx.doi.org/10.54207/bsmps1000-2005-04tq9q.

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A pilot study was conducted in order to evaluate efficacy and economy of large-scale production of clonal plantlets of Teak. Semi-hardwood shoot cuttings taken from vegetative multiplication garden were treated with low doses of composite auxins (IAA, IBA and NAA) in combination with thiamine. Strong synergistic interaction between thiamine and auxins was observed for adventitious rhizogenesis, as the resultant increment in adventitious rhizogenesis due to combined auxin and thiamine application was several folds greater than from the independent application of auxins and thiamine alone. Treat

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12

Hussain, Sajid, Satyabrata Nanda, Junhua Zhang, et al. "Auxin and Cytokinin Interplay during Leaf Morphogenesis and Phyllotaxy." Plants 10, no. 8 (2021): 1732. http://dx.doi.org/10.3390/plants10081732.

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Auxins (IAA) and cytokinins (CKs) are the most influential phytohormones, having multifaceted roles in plants. They are key regulators of plant growth and developmental processes. Additionally, their interplay exerts tight control on plant development and differentiation. Although several reviews have been published detailing the auxin-cytokinin interplay in controlling root growth and differentiation, their roles in the shoot, particularly in leaf morphogenesis are largely unexplored. Recent reports have provided new insights on the roles of these two hormones and their interplay on leaf grow

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13

Martens, Dean, Tim Hartz, and William Frankenberger. "UTILIZATION OF SOIL-APPLIED AUXINS FOR SYNCHRONIZATION OF FRUIT SET AND YIELD INCREASE IN CITRULLUS LANATUS." HortScience 27, no. 6 (1992): 642g—643. http://dx.doi.org/10.21273/hortsci.27.6.642g.

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Exogenous application of auxins to plants has been reported to increase flowering, fruit set and decrease fruit abcission. This laboratory and field study determined that two auxins, identified by HPLC analysis with a long soil residence time and a high conversion to indole-3-acetic acid, synchronized and increased harvest of melons. The two watermelon varieties, `Tiffany' (seedless) and `Picnic' (seed) were treated with auxin and tryptophan (TRP) concentrations ranging from 10-4 to 10-10 M applied to the root ball one week before transplanting to a Buren soil. Optimum application levels (10-6

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14

ĐORĐE, MALENČIĆ, PRVULOVIĆ DEJAN, POPOVIĆ MILAN, et al. "CHANGES IN THE LIPID PEROXIDATION INTESITY IN AUXIN TREATED CHERRY ROOTSTOCKS SOFTWOOD CUTTINGS." Contemporary Agriculture (2012) 61, no. 3-4 (2012): 221–29. https://doi.org/10.5281/zenodo.7266674.

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In order to investigate the effect of phytohormones exogenous auxins on the level of the mechanical injury induced oxidative stress, intensity of lipid peroxidation (LP) was measured in rootstocks of cherry softwood cuttings. Basal parts of the cuttings and leaves of five rootstocks (Mahaleb 1 and 2, Gisela 5, European ground cherry (EGC) and “Oblačinska” sour cherry) were sampled 0, 2, 4 and 6 days after cutting. Cuttings were treated with 0.5% solutions of three auxins: α-naphthylacetic acid (NAA), indolebutyric acid (IBA) and combination of these two (INCIT K). Results obt

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15

Bukar, Sani Mai, Halima Mohammed Abba, and Isma’ila Muhammad. "Studies on the Comparative Effects of Three Auxins and Seasons on the Rooting of Stem Cuttings of Moringa oleifera Lam (Moringaceae)." Bulletin of Environmental Science and Sustainable Management (e-ISSN 2716-5353) 6, no. 1 (2022): 39–45. http://dx.doi.org/10.54987/bessm.v6i1.709.

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Rooting on mature stem cuttings of the Drumstick tree, Moringa oleifera, Lam. Moringaceae, was studied using three auxins (indole-3-acetic acid (IAA), indole-3-butyric acid (IBA) and maphthalene acetic acid (NAA) at two seasons. The experiments were carried out at random using a 342 factorial design. The growth of stem cuttings prior to rooting was influenced by auxin concentrations and the seasons. Stem cuttings taken during the wet season and treated with 500 mg/L of IBA, NAA, and IAA sprouted 18-27 days sooner than dry season cuttings (24-30 days after planting or DAP). Wet-season bud devel

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16

PRATAP, ADITYA, and HARINDER K. CHAUDHARY. "Comparative effect of auxin analogues on induction of polyhaploids in triticale and triticale wheat hybrids through wheat maize system." Indian Journal of Agricultural Sciences 82, no. 1 (2012): 66–70. http://dx.doi.org/10.56093/ijas.v82i1.13879.

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The study was designed to evaluate two auxins, 2,4-D and picloram for their effectiveness for induction of polyhaploids in triticale and triticale × wheat crosses and to standardize their optimum dose. Ten F1 and parental genotypes pollinated with maize were subjected to in vivo auxin treatment at three concentrations (100, 250 and 400 mg/l) by injecting at the tiller base of the crossed spikes so as to fill the hollow of their uppermost internode. Both auxins restulted in formation of embryo-carrying seeds, though the performance differed significantly for the three parameters of haploid indu

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17

Arnold, Neville P., Michael R. Binns, Daniel C. Cloutier, Nayana N. Barthakur, and Raymond Pellerin. "Auxins, Salt Concentrations, and Their Interactions during in Vitro Rooting of Winter-hardy and Hybrid Tea Roses." HortScience 30, no. 7 (1995): 1436–40. http://dx.doi.org/10.21273/hortsci.30.7.1436.

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Auxins, medium salt concentrations, and their interactive effects on rooting of two winter-hardy roses (Rosa kordesii Wulff `John Franklin' and `Champlain') and two hybrid teas (Rosa hybrida `John Paul II' and `Landora') were studied. The auxins (in mg·liter–1) IAA (0, 0.3, 1.5, 3.0, 6.0, or 15.0), IBA (0, 0.1, 0.2, 0.5, 1.0, or 3.0), and NAA (0, 0.1, 0.2, 0.5, 1.0, or 3.0) each were combined factorially with modified Murashige and Skoog (MS) medium (1/4, 1/2, 3/4, and full MS concentrations) and were tested for optimal rooting response. `John Franklin', `John Paul II', and `Landora' rooted we

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18

Salinas, Máximo, Guido Hakim, Esteban Gandolfo, Juan De Lojo, Ernesto Giardina, and Adalberto Di Benedetto. "Involvement of auxins in Impatiens walleriana plants grown in different plug tray systems during nursery." Ornamental Horticulture 28, no. 3 (2022): 347–54. http://dx.doi.org/10.1590/2447-536x.v28i3.2511.

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Abstract The key role of auxins as integrators of environmental signals has become well-known in recent years, and emerging evidence indicates that auxin biosynthesis is an essential component of the overall mechanisms of plant tolerance to stress. However, although the knowledge of the involvement auxins in the responses related to the generation of roots and accumulation of biomass, studies in ornamental species concerning the commercial propagation in plug cell trays are scarce. Thus, the aim of this work was to evaluate the accumulation of pre-transplant biomass in Impatiens walleriana pla

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Denysiuk, Liubov, Igor Gorbatenko, Mikhailo Gill, and Yaroslav Smuzhanytsia. "Use auxins and Antioxidants to Optimise Nutrient Medium of Tomato Tissue Culture." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 78, no. 5-6 (2024): 380–82. https://doi.org/10.2478/prolas-2024-0053.

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Abstract Calli characteristics of tomato grown in vitro on different nutrient media supplemented with auxins and antioxidants in various combinations were studied. Explants were cut from the hypocotyl, apex, and cotyledons and cultivated on Murashige and Skoog medium supplemented with some auxins and antioxidants. It was found that the regeneration potential was higher in combinations with joint application of antioxidant and a phytohormone of the auxin group — indolyl-acetic acid. The obtained results demonstrate differential influence of specific biologically active substances on the manifes

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Kumar, Ramesh, Nazeer Ahmed, O. Chand Sharma, and Shiv Lal. "Influence of Auxins on Rooting Efficacy in Carnation (Dianthus caryophyllus L.) Cuttings." Journal of Horticultural Sciences 9, no. 2 (2014): 157–60. http://dx.doi.org/10.24154/jhs.v9i2.187.

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Effect of various auxins (IBA, IAA and NAA) on different types of cuttings was investigated to determine efficacy of auxins in promoting rooting in carnation (Dianthus caryophyllus L.). Auxin and type of cutting significantly affected rooting traits. NAA was found to be more effective in promoting early rooting and inducing profuse rooting, root number, fresh and dry weight of roots and longer roots. Among the auxins used, earliest rooting (18.69 days), highest rooting percentage (58.70 %), number of roots (13.18), root length (12.26 cm), and, highest fresh and dry weight of roots (4.93g and 4

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Martynenko, E. V., T. N. Arkhipova, Z. A. Akhtyamova, and L. Y. Kuz’mina. "Effect of Bacterial Strains with Different Ability to Synthesize Auxins and Cytokinins on the Growth and Water Relations of Wheat Plants." Агрохимия, no. 1 (January 15, 2023): 49–56. http://dx.doi.org/10.31857/s0002188123010064.

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The content of cytokinins, auxins, chlorophyll, transpiration, content and relative content of water, water and osmotic potentials, hydraulic conductivity, morphological parameters of durum wheat (Triticum durum Desf.) plants after the introduction into their rhizosphere of cytokinin-producing strains (Bacillus subtilis IB-22) or auxin-producing (Pseudomonas mandelii IB-Ki14) bacteria was evaluated. The experiments were carried out in laboratory conditions in vessels with agrochernozem at an optimal level of illumination. It was shown that the cytokinin-producing strain stimulated plant growth

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Timergalina, L. N., L. B. Vysotskaya, T. V. Nuzhnaya, et al. "EFFECT OF ILLUMINATION INTENSITY ON AUXIN DISTRIBUTION BETWEEN SHOOT AND ROOT AND ON LATERAL ROOTS FORMATION." ÈKOBIOTEH 5, no. 4 (2022): 232–40. http://dx.doi.org/10.31163/2618-964x-2022-5-4-232-240.

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The influence of illumination on the level of endogenous auxins content and localization and their transport from shoots to roots in regulating lateral root branching of barley plants was investigated. The four times reducing of illumination was found to suppress the lateral roots formation in two days after beginning of exposure. The decrease in roots and shoots IAA content and in the intensity of phloem cells staining for auxins on leaf sections were observed already in a day after the light was reduced. A decline in auxin content in the roots was appeared to a greater extent compared to the

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Pirog, T. P., N. O. Leonova, D. V. Piatetska, N. O. Klymenko, V. I. Zhdanyuk, and T. A. Shevchuk. "Induction of Auxins Synthesis by Rhodococcus erythropolis IMV Ac-5017 with the Addition of Tryptophan to the Cultivation Medium." Mikrobiolohichnyi Zhurnal 82, no. 6 (2020): 3–12. http://dx.doi.org/10.15407/microbiolj82.06.003.

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The ability of surfactant producers to synthesize phytohormones expands the scope of their practical application and provides prospects for the development of microbial preparations with growth-stimulating properties. The possibility to intensify the phytohormone-stimulants synthesis by bacterial strains increases the efficiency of such preparations. Aim. The aim is to research the possibility of extracellular auxin synthesis induction in the presence of tryptophan in the cultivation medium of surfactant producer Rhodococcus erythropolis IMV Ac-5017 and establish the optimal concentration of t

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Do, Thi Cam Van, Dang Thuan Tran, Truong Giang Le, and Quang Trung Nguyen. "Characterization of Endogenous Auxins and Gibberellins Produced by Chlorella sorokiniana TH01 under Phototrophic and Mixtrophic Cultivation Modes toward Applications in Microalgal Biorefinery and Crop Research." Journal of Chemistry 2020 (June 4, 2020): 1–11. http://dx.doi.org/10.1155/2020/4910621.

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Microalgae have been reported to produce endogenous phytohormones including auxins, gibberellins, cytokinins, brassinosteroids, and abscisic acid. Methanol residual released from microalgal lipid extraction usually contains a variety of bioactive compounds including the phytohormones; however, they are poorly characterized and used for other applications. This study aimed at investigating auxin, gibberellin, and cytokinin production of C. sorokiniana TH01 under phototrophic and mixtrophic cultivations. Moreover, endogenous auxins, gibberellins, and cytokinins in methanol residual obtained from

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Wei, Kang, Li Ruan, Liyuan Wang, and Hao Cheng. "Auxin-Induced Adventitious Root Formation in Nodal Cuttings of Camellia sinensis." International Journal of Molecular Sciences 20, no. 19 (2019): 4817. http://dx.doi.org/10.3390/ijms20194817.

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Adventitious root (AR) formation is essential for the successful propagation of Camellia sinensis and auxins play promotive effects on this process. Nowadays, the mechanism of auxin-induced AR formation in tea cuttings is widely studied. However, a lack of global view of the underlying mechanism has largely inhibited further studies. In this paper, recent advances including endogenous hormone changes, nitric oxide (NO) and hydrogen peroxide (H2O2) signals, secondary metabolism, cell wall reconstruction, and mechanisms involved in auxin signaling are reviewed. A further time course analysis of

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Korobova, Alla, Ruslan Ivanov, Leila Timergalina, et al. "Effect of Low Light Stress on Distribution of Auxin (Indole-3-Acetic Acid) between Shoot and Roots and Development of Lateral Roots in Barley Plants." Biology 12, no. 6 (2023): 787. http://dx.doi.org/10.3390/biology12060787.

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Depending on their habitat conditions, plants can greatly change the growth rate of their roots. However, the mechanisms of such responses remain insufficiently clear. The influence of a low level of illumination on the content of endogenous auxins, their localization in leaves and transport from shoots to roots were studied and related to the lateral root branching of barley plants. Following two days’ reduction in illumination, a 10-fold reduction in the emergence of lateral roots was found. Auxin (IAA, indole-3-acetic acid) content decreased by 84% in roots and by 30% in shoots, and immunol

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Gbadamosi, A. E., and O. Oni. "Macropropagation of an Endangered Medicinal Plant, Enantia Chlorantha Oliv." Arboriculture & Urban Forestry 31, no. 2 (2005): 78–82. http://dx.doi.org/10.48044/jauf.2005.009.

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The effects of auxins and leaf size on the rooting of juvenile, single-node leafy stem cuttings of Enantia chlorantha Oliv. were investigated. Percentage survival of the cuttings differed among the auxins, their levels, and cutting leaf sizes. Half-leaf cuttings had the highest mean percentage survival of 70% under both naphthalene acetic acid (NAA) and the control followed by indole-3-butric acid (IBA) (60%) and the combination of IBA/NAA with 40% survival. Among full-leaf cuttings, the control treatment and the combination of IBA/NAA had a mean percentage survival of 100%, followed by IBA wi

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AURORI, Adriana, Imola MOLNAR, and Elena RAKOSY-TICAN. "The effect of auxins in inducing organogenesis or somatic embryogenesis in mature sunflower zygotic embryo derived apex." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 48, no. 1 (2020): 150–61. http://dx.doi.org/10.15835/nbha48111591.

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Induction of shoots or of somatic embryos is the key step for gaining the morphogenetic potential in sunflower (Helianthus annuus L.), species known as recalcitrant to in vitro regeneration. In the immature zygotic embryo derived tissues or in other juvenile tissues resulted from seedlings, the acquisition of the competence for regeneration can be achieved directly by cytokinin treatment or by preconditioning the explants on cytokinin containing medium. In this paper is presented a new type of explant for sunflower in vitro culture, consisting of the apex with primordial leaves, resulted from

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Guilfoyle, TJ, G. Hagen, Y. Li, et al. "Auxin-Regulated Transcription." Functional Plant Biology 20, no. 5 (1993): 489. http://dx.doi.org/10.1071/pp9930489.

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We have cloned and sequenced a number of auxin-responsive cDNAs and their corresponding genes from soybean and Arabidopsis. Each of these genes, with the exception of GH2/4, is transcriptionally regulated specifically by auxins within minutes after hormone application. The auxin-responsive mRNAs are induced some 3-60-fold depending on the type of mRNA analysed, the tissue examined, the dose and duration of auxin application, and the manipulation of the organ tested. Some of the mRNAs show rapid turnover kinetics. The mRNAs show distinct patterns of organ-specific, tissue-specific, and developm

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Prieto-Martínez, Fernando D., Jennifer Mendoza-Cañas, and Karina Martínez-Mayorga. "To Bind or Not to Bind? A Comprehensive Characterization of TIR1 and Auxins Using Consensus In Silico Approaches." Computation 12, no. 5 (2024): 94. http://dx.doi.org/10.3390/computation12050094.

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Auxins are chemical compounds of wide interest, mostly due to their role in plant metabolism and development. Synthetic auxins have been used as herbicides for more than 75 years and low toxicity in humans is one of their most advantageous features. Extensive studies of natural and synthetic auxins have been made in an effort to understand their role in plant growth. However, molecular details of the binding and recognition process are still an open question. Herein, we present a comprehensive in silico pipeline for the assessment of TIR1 ligands using several structure-based methods. Our resu

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Matilla, Angel J. "Auxin: Hormonal Signal Required for Seed Development and Dormancy." Plants 9, no. 6 (2020): 705. http://dx.doi.org/10.3390/plants9060705.

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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, auxin has recently emerged as an essential player that modulates, in conjunction with ABA, different cellular processes involved in seed development as well as the induction, regulation and maintenance of primary dormancy (PD). This review examines and discusses the key role of auxin as a signaling molecule that coordinates seed life. The cellular machinery involved in the synthesis and

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Yue, Haiyan, Qunce Sun, Shuzhen Zhang, et al. "Exogenous Gibberellins and Auxins Promote Crown Bud Regeneration and Influence Endogenous Hormone Changes in Alfalfa." Plants 14, no. 11 (2025): 1699. https://doi.org/10.3390/plants14111699.

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Alfalfa (Medicago sativa L.) is a globally significant forage crop with notable economic value. Gibberellins (GA3) promote dormancy breaking and early germination whereas auxins (IAA) predominantly influence bud regeneration. This study investigated the effects of exogenous gibberellins and indole acetic acid on the regeneration and biomass of crown buds in two alfalfa varieties with different dormancy levels. The experiment involved five concentrations each of gibberellins (0 mg/L, 10 mg/L, 20 mg/L, 30 mg/L, and 40 mg/L) and auxins (0 mg/L, 5 mg/L, 10 mg/L, 15 mg/L, and 20 mg/L). The results

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33

СHETVERIKOV, Sergey, Arina FEOKTISTOVA, Maxim TIMERGALIN, et al. "Mitigation of the negative effect of auxinic herbicide by bacterial suspension of Pseudomonas protegens DA1.2 in wheat plants under drought conditions." Acta agriculturae Slovenica 119, no. 1 (2023): 1. http://dx.doi.org/10.14720/aas.2023.119.1.2764.

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<p class="042abstractstekst"><span lang="EN-US">Effect of auxin-producing bacterial strain (<em>Pseudomonas protegens</em> DA1.2) was investigated under conditions of drought and herbicide treatment in wheat plants. Positive effect of the bacterial suspension on wheat plants treated with auxinic herbicide under drought conditions was manifested in reducing the content of malondialdehyde and proline, preventing inhibition of plant growth and normalizing chlorophyll content. Under combined stress, changes in concentrations and redistribution of phytohormones in plants wer

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34

Galoch, Elżbieta, Marian Michniewicz, and Zofia Zatorska. "Dynamics of endogenous auxins, cytokinins and abscisic acid-like inhibitor in embryonic shoots of young Scots pine (Pinus silvestris L.) at the time of flower primordia initiation." Acta Societatis Botanicorum Poloniae 48, no. 3 (2015): 473–82. http://dx.doi.org/10.5586/asbp.1979.038.

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Auxins, cytokinins and ABA-like inhibitor were determined in the embryonic shoots of young pines. It was stated that the transition from vegetative to reproductive stage of pine development is connected with the decrease of the IAA level. In the group of vegetative plants an unknown auxin-like substance was detected. This substance appeared in the period of generative development initiation. It was also stated that differentiation of female inflorescences was connected with the increase of the level of ABA-like inhibitor. However the differentiation of male ones was connected with decrease of

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35

Chopra, RN, and BD Vashistha. "The Effect of Auxins and Antiauxins on Shoot-Bud Induction and Morphology in the Moss, Bryum atrovirens Will ex Brid." Australian Journal of Botany 38, no. 2 (1990): 177. http://dx.doi.org/10.1071/bt9900177.

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The protonema of the moss Bryum atrovirens remains bud-free under ordinary cultural conditions on Nitsch's basal medium. Exogenously applied auxins (Indole-3-acetic acid; 2-4-dichlorophenoxyacetic acid; α-naphthaleneacetic acid and β-naphthoxyacetic acid) induced buds on protonemata, whereas antiauxins (Maleic hydrazide and 2,3,5-triiodobenzoic acid) failed to do so. Morphology of the gametophores depended upon the concentration of auxin in the medium. In general, normal leafy gametophores resulted at lower concentrations, and at higher levels of auxins morphology was adversely affected. Simul

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36

Liljana, Koleva Gudeva, Trajkova Fidanka, Mihajlov Ljupco, and Troicki Julijana. "Influence of Different Auxins on Rooting of Rosemary, Sage and Elderberry." Annual Research & Review in Biology 12, no. 5 (2017): 1–8. https://doi.org/10.9734/ARRB/2017/33162.

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<strong>Aims: </strong>The aim of research is to examine the influence of auxins IAA, IBA, NAA and commercial rooting product on rooting of cuttings from rosemary (<em>Rosmarinus officinialis</em> L.), sage (<em>Salvia officinialis </em>L.) and elderberry (<em>Sambucus nigra </em>L). <strong>Study Design:</strong> Completely randomized design. <strong>Place and Duration of Study:</strong> The experiment was conducted in a plastic tunnel with three beds in Stip, Republic of Macedonia, between October 2012 and January 2013. <strong>Methodology:</strong> Fifty cuttings from each experimental spec

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37

Darnell, Rebecca L., L. Carl Greve, and George C. Martin. "Synthesis and Biological Activity of [14C]IAA Ethyl Ester." HortScience 22, no. 1 (1987): 97–99. http://dx.doi.org/10.21273/hortsci.22.1.97.

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Abstract A simple procedure for synthesizing and purifying the [14C]ethyl ester of IAA (Et-IAA) is described. This auxin has been found to stimulate parthenocarpic fruit set in day-neutral strawberries (Fragaria × ananassa Duch. ‘Fern’), which are non-responsive to various other auxins. Et-IAA may prove useful in eliciting physiological responses in systems shown previously to be auxin-nonresponsive. Chemical name used: 1H-indole-3-acetic acid (IAA).

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38

van Iersel, Marc. "Auxins Increase Post-transplant Growth of Vinca." HortScience 32, no. 3 (1997): 438A—438. http://dx.doi.org/10.21273/hortsci.32.3.438a.

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Auxins are commonly used to induce root formation during in-vitro culture of higher plants. Because transplanting is often accompanied by root damage and loss of small roots, auxins also could be beneficial in minimizing transplant shock. Vinca (Cataranthus rosea) seeds were germinated in a peat-lite growing mix and transplanted into pots (55 mL) filled with a diatomaceous earth (Isolite) 10 days after planting. Pots were then placed in a tray containing 62.5 mL of auxin solution per pot. Two different auxins [indole-acetic acid (IAA) and naphtylacetic acid (NAA)] were applied at rates ranging

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39

Bieleszová, Kristýna, Barbora Pařízková, Martin Kubeš, et al. "New fluorescently labeled auxins exhibit promising anti-auxin activity." New Biotechnology 48 (January 2019): 44–52. http://dx.doi.org/10.1016/j.nbt.2018.06.003.

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40

Gho, Yun-Shil, Min-Yeong Song, Do-Young Bae, Heebak Choi, and Ki-Hong Jung. "Rice PIN Auxin Efflux Carriers Modulate the Nitrogen Response in a Changing Nitrogen Growth Environment." International Journal of Molecular Sciences 22, no. 6 (2021): 3243. http://dx.doi.org/10.3390/ijms22063243.

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Auxins play an essential role in regulating plant growth and adaptation to abiotic stresses, such as nutrient stress. Our current understanding of auxins is based almost entirely on the results of research on the eudicot Arabidopsis thaliana, however, the role of the rice PIN-FORMED (PIN) auxin efflux carriers in the regulation of the ammonium-dependent response remains elusive. Here, we analyzed the expression patterns in various organs/tissues and the ammonium-dependent response of rice PIN-family genes (OsPIN genes) via qRT–PCR, and attempted to elucidate the relationship between nitrogen (

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Bianco, Carmen, and Roberto Defez. "Auxins upregulatenifandfixgenes." Plant Signaling & Behavior 5, no. 10 (2010): 1290–94. http://dx.doi.org/10.4161/psb.5.10.13068.

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Mihaljević, S., and B. Salopek-Sondi. " Alanine conjugate of indole-3-butyric acid improves rooting of highbush blueberries." Plant, Soil and Environment 58, No. 5 (2012): 236–41. http://dx.doi.org/10.17221/34/2012-pse.

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Auxins and their synthetic analogues are commonly used for rooting of cuttings, but their efficiency depends on experimental set-up and, even more importantly, on species or cultivar, and type of explants investigated. In attempt to improve rooting procedure for highbush blueberries (Vaccinium corymbosum L.), we investigated alanine conjugate of indole-3-butyric acid (IBA-Ala) as potential root-promoting compound and compared with commonly used auxins indole-3-butyric acid (IBA) and indole-3-acetic acid (IAA). The effect of different concentrations of auxins on the rooting of highbush blueberr

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Park, Chang Ha, Aye AyeThwe, Sun Ju Kim, et al. "Effect of Auxins on Anthocyanin Accumulation in Hairy Root Cultures of Tartary Buckwheat Cultivar Hokkai T10." Natural Product Communications 11, no. 9 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100924.

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This study investigated the influence of auxins on the growth of hairy roots and accumulation of anthocyanins, including cyanidin 3- O-glucoside (C3gl) and cyanidin 3- O-rutinoside (C3r), in the hairy root culture of tartary buckwheat cultivar Hokkai T10. C3gl and C3r contents were evaluated using highperformance liquid chromatograph (HPLC). Four auxins, 2,4-dichlorophenoxyacetic acid (2,4-D), indoleacetic acid (IAA), indolebutyric acid (IBA) and naphthaleneacetic acid (NAA), were added to the medium of the hairy root cultures at diverse concentrations. IAA, IBA and 2,4-D promoted the growth o

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44

Yu, Min, Kai Liu, Shengquan Liu, Haiyan Chen, Liang Zhou, and Yamei Liu. "Effect of exogenous IAA on tension wood formation by facilitating polar auxin transport and cellulose biosynthesis in hybrid poplar (Populus deltoids × Populus nigra) wood." Holzforschung 71, no. 2 (2017): 179–88. http://dx.doi.org/10.1515/hf-2016-0078.

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Abstract Auxins as phytohormons, responsible for coordination of growing processes, also contribute to the formation of tension wood (TW) in trees, but the mechanism of this process is still unclear. In this study, it has been tried to induce TW formation in erect hybrid poplar trees (in opposite to inclined or bended trees) by treatment with exogenous indole-3-acetic acid (IAA, as one of the auxins) or N-1-naphthylphthalamic acid (NPA) as an auxin transport inhibitor. The treatment with IAA resulted in TW formation and, as expected, NPA treatment did not. The gelatinous fiber formation and hi

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Elmongy, Mohamed S., Xiuyun Wang, Hong Zhou, and Yiping Xia. "Humic Acid and Auxins Induced Metabolic Changes and Differential Gene Expression during Adventitious Root Development in Azalea Microshoots." HortScience 55, no. 6 (2020): 926–35. http://dx.doi.org/10.21273/hortsci14885-20.

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Auxins and humic acid (HA) were investigated for their roles in adventitious root induction in azalea microshoots in our previous study. To reveal the regulatory mechanisms of auxins and HA in this process, measurements of the levels of reactive oxygen species (ROS), carbohydrates, and phenolic compounds and gene expression during in vitro root development were performed. During the adventitious root induction process, ROS levels in shoots treated with auxins and HA increased compared to untreated shoots, especially during the earliest period after transfer to the media. Media supplemented wit

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Shubham, Sanjeet Singh Sandal, Puneet Walia, and Vidushi Upadhyay. "Application of Auxins in Haploid Embryo Induction in Hexaploidy Wheat." International Journal of Environment and Climate Change 13, no. 9 (2023): 251–55. http://dx.doi.org/10.9734/ijecc/2023/v13i92228.

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Doubled haploid (DH) plant production plays a crucial role in modern plant breeding programs, offering an efficient means to generate homozygous lines from heterozygous parents within a single generation. Different types of auxins have been utilized in wheat cross with maize DH production, with 2,4-D being the most widely used and effective hormone, followed by dicamba. Other auxins, including picloram, Indole-3-acetic acid (IAA), phenylacetic acid (PAA), silver nitrate, 1-naphthaleneacetic acid (NAA), kinetin, 6-benzyladenine (BA), and zearalenone, have also been tested for their potential ro

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Liu, Huabin, Yue Wu, Jiahui Cai, et al. "Effect of Auxin on Cadmium Toxicity-Induced Growth Inhibition in Solanum lycopersicum." Toxics 12, no. 5 (2024): 374. http://dx.doi.org/10.3390/toxics12050374.

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Auxins play crucial regulatory roles in plants coping with cadmium (Cd) stress. However, the regulatory mechanism by which auxins alleviate Cd toxicity in tomato seedlings remains unclear. Here, we demonstrate that exposure to Cd stress leads to dynamic changes in the auxin response in tomato roots, characterized by an initial increase followed by a subsequent weakening. Under Cd stress, tomato seedlings show primary root- and hypocotyl-growth inhibition, accompanied by the accumulation of Cd and reactive oxygen species (ROS) in the roots. The exogenous application of 1-naphthylacetic acid (NA

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Tognacca, Rocío Soledad, Karin Ljung, and Javier Francisco Botto. "Unveiling Molecular Signatures in Light-Induced Seed Germination: Insights from PIN3, PIN7, and AUX1 in Arabidopsis thaliana." Plants 13, no. 3 (2024): 408. http://dx.doi.org/10.3390/plants13030408.

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Light provides seeds with information that is essential for the adjustment of their germination to the conditions that are most favorable for the successful establishment of the future seedling. The promotion of germination depends mainly on environmental factors, like temperature and light, as well as internal factors associated with the hormonal balance between gibberellins (GA) and abscisic acid (ABA), although other hormones such as auxins may act secondarily. While transcriptomic studies of light-germinating Arabidopsis thaliana seeds suggest that auxins and auxin transporters are necessa

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Kader, Adel A. "Ethylene-induced Senescence and Physiological Disorders in Harvested Horticultural Crops." HortScience 20, no. 1 (1985): 54–57. http://dx.doi.org/10.21273/hortsci.20.1.54.

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Abstract Ethylene plays a major role in plant senescence via its direct and indirect effects on the regulation of metabolism. The known physiological and biochemical effects of C2H4 on harvested horticultural crops include increased respiratory activity; increased activity of enzymes such as polygalacturonase, peroxidase, lipoxidase, alphaamylase, polyphenol oxidase, and phenylalanine ammonialyase (PAL); increased permeability and loss of cell compartmentalization; and alteration of auxin transport or metabolism (34). Nevertheless, the mechanism by which C2H4 promotes senescence remains unknow

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Pirog, T. P., N. O. Leonova, I. V. Savenko та G. O. Iutynska. "PROSPECTS OF ACINETOBACTER CALCOACETICUS ІMV B-7241 METABOLITES USE IN AGRICULTURE". Agriciltural microbiology 21 (6 серпня 2015): 18–24. http://dx.doi.org/10.35868/1997-3004.21.18-24.

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The possibility of simultaneous synthesis of surfactants with antimicrobial properties and phytohormones (auxins, cytokinins and abscisic acid) by Acinetobacter calcoaceticus ІMV B-7241 was revealed. It was shown that the survival of cells (105–107 cells/ml) of the Pseudomonas and Xanthomonas phytopathogenic bacteria was within 0–33 % range after the treatment with surfactant solution (0.15 mg/ml) for 2 h. The dependence of qualitative and quantitative composition of auxins and cytokinins on the nature of carbon source in the medium cultivation (ethanol, glycerol, refined and frying sunflower

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