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Showing 1 to 20 of 22 for “"auxins"”.
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Derivation and chromatographic separation of acid indole auxins
For many years silylation of polar and thermolabile compounds has been used to facilitate their gas chromatographic analysis. The three phytochemically significant indole acids; 3-indole acetic acid, 3-indole propionic acid, and 3-indole butyric acid along with an analog, D-tryptophan, are four …
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Azido Auxins: Synthesis and Use as Photoaffinity Labeling Agents
… 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 6-azidoindole-3-acetic acid, were prepared in seven steps with overall yields of 2-20%. The nonfluorescent analogs are stable …
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The Hormonal Regulation of Growth of Suspension Cultures of Acer pseudoulatanus L. cells
… the intra- and extra-cellular concentrations of auxins in an auxin-dependent line (OS) of sycamore cells have suggested that endogenous IAA may be a major regulatory factor during a large part of a culture passage. Further experiments with two auxin-prototrophic cell lines (HK and EHM) have …
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Regulace zakládání hlíz u bramboru: role auxinu
… also play an important signaling role, i.a. auxins. During tuber initiation, IAA levels in stolon tissues increase. PIN transporters are likely to be involved in the redistribution of auxin in the stolon, but also LAX and ABCB transporters and components of auxin signaling pathway, Aux/IAAs …
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Effects of commercial kelp extract and plant growth regulators on growth of Gracilaria gracilis in culture
… significant amounts of plant growth regulators (auxins and cytokinins). The aim of this study was therefore to investigate the effects of this commercial seaweed concentrate (Kelpak®) on the growth of Gracilaria gracilis (Stackhouse) Steentoft, Irvine et Farnham, with a view to the potential in …
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Characterization of Arabidopsis thaliana mutants defetive in auxin metabolism
Auxins are an important class of phytohormones that play a critical role in various aspects of plant growth and development such as cell elongation, cell division, apical dominance, tropisms, and fruit ripening. The most abundant naturally occurring auxin is indole-3-acetic acid (IAA). IAA is found …
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Determining the Genes for Distyly in Turnera
… is discussed which involves brassinosteroids and auxins.
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Die Rolle von Kaliumkanälen der AKT1-Unterfamilie für Kaliumaufnahme und gerichtetes Wachstum
… Signalweg, welcher zur Umverteilung endogenen Auxins innerhalb der Koleoptile und zur differentiellen Kaliumaufnahme über ZMK1 in den gegenüberliegenden Flanken führt. Die hierdurch bedingte stärker ausgeprägte Zellstreckung in der unbelichteten Koleoptilenhälfte hat schließlich die Krümmung …
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Callus Development and Organogenesis in Cultured Explants of Cowpea (Vigna unguiculata (L.) Walp
… of cowpea using Murashige and Skoog (MS) medium, auxins and cytokinins resulted in the formation of callus and rhizogenesis. Calli that were formed were separated into six classes based on color and texture. Yellowish friable callus, yellowish compact, soft yellowish callus and green and white …
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Phytohormones and the Culture of Agaricus bisporus (Lange) Pilat
… amounts of the three groups of phytohormones (auxins, gibberellins and cytokinins). The fluctuation in levels of phytohormones in compost and casing soil were related to fluctuations in the population of bacteria and fungi. Phytohormones play a role in regulating the interaction between A. …
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MOLECULAR ASPECTS OF DIRECT SOMATIC EMBRYOGENESIS IN ALFALFA (MEDICAGO)
… embryos by external stimuli (wounding and auxins) without cell dedifferentiation. In this system, embryogenic competence and the initial embryogenic cell divisions can be linked to expression of the genes (such as cyclin-dependent kinases and cyclins) which determine and regulate cell …
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Role of phosphatases in controlling arabidopsis mapk signalling cascades
… gene, root growth is hypersensitive to exogenous auxins, consistent with the lower auxin sensitivity reported for ibr5 mutants. Taken together, my data demonstrate for the first time that both AtMKP2 and IBR5 are bona fide Arabidopsis MAPK phosphatases and that they serve as important regulators …
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PROPAGATION OF PLANTS BY SOMATIC EMBRYOGENESIS
… of callus were induced by different synthetic auxins. These types were modified when grown in different vessels. Subculture of callus resulted in root or shoot formation but no somatic embryos were produced. Multifactorial experiments were used to determine the conditions under which callus …
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Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California
… included foliar applications of two synthetic auxins, 1-naphthaleneacetic acid (NAA) at 20, 60, or 100 ppm or 2,4-dichlorophenoxyacetic acid (2,4-D) at 5, 25, or 45 ppm, each applied during early or late fruit set. Girdling was also conducted at early or late fruit set, for a total of 15 …
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Preemergence activity of chloroacetamide herbicides on a multiple herbicide-resistant population of waterhemp (amaranthus tuberculatus)
… oxidase (PPO) inhibitors, synthetic auxins, Photosystem II inhibitors (PSII), and 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors. Chloroacetamide herbicides, however, have remained effective. During research on the first HPPD-resistant population of waterhemp from Mclean …
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Factors Associated with Pollinator Foraging and Floral Morphology of Lawn Weeds
… including halosulfuron, sulfentrazone, synthetic auxins, and topramezone reduced floral density, altered UV reflectance, and deterred pollinators to varying degrees on weedy flowers. Synthetic auxin herbicides completely eliminated pollinator visitation within two days and degraded white clover …
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Functional characterisation of NIC2, a member of the MATE family from Arabidopsis thaliana (L.) Heynh.
… an enhanced resistance to exogenously applied auxins, i.e. indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) when compared with the wild-type roots. Based on these results, it is suggested that the NIC2 overexpression and NIC2 RNAi phenotypes were due to decreased or increased levels …
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In vitro tissue culture: Towards conservation of threatened desiccation sensitive Encephalartos cycads seeds
… ABA compared to the low levels of cytokinins and auxins, as well as the absence of GAs obtained in the assessed seed tissue, suggest that no real germination was taking place. Thus these results suggest that E. altensteinii seeds have a very slow developmental process with the likely chance that …
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Control and Fecundity of Palmer Amaranth (Amaranthus palmeri) and Common Ragweed (Ambrosia artemisiifolia) from Soybean Herbicides Applied at Various Growth and Development Stages
Palmer amaranth (Amaranthus palmeri) and common ragweed (Ambrosia artemisiifolia) are two of the most troublesome weeds in soybean. Both weeds possess widespread resistance to glyphosate and acetolactate synthase (ALS) inhibiting herbicides resulting in the use of protoporphyrinogen oxidase- (PPO) …
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