Catecholamines in plants

Kuklin, Alexander I.; Conger, B. V.

doi:10.1007/bf00203119

Cited by 53 publications

(24 citation statements)

References 38 publications

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“…Swiedrych et al (2004) reported that plant catecholamines are involved in plant responses towards biotic and abiotic stresses in potato. In addition, catecholamines are involved in key processes, such as plant tissue growth, somatic embryogenesis, flowering, inhibition of indole-3-acetic acid oxidation and stimulation of ethylene biosynthesis (Kuklin and Conger 1995).…”

Section: Discussionmentioning

confidence: 99%

Metabolic profiling of photoautotrophic and photomixotrophic potato plantlets (Solanum tuberosum) provides new insights into acclimatization

Badr

Angers

Desjardins

2011

Plant Cell Tiss Organ Cult

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Conventional photomixotrophic micropropagation systems are inefficient due to the high rates of mortality upon the transfer of plantlets from in vitro to ex vitro conditions. Exogenous medium sugar has been suggested to be the major cause of this problem. The aim of this study was to investigate the role of sucrose supply on the metabolic profile of in vitro-grown potato plantlets subjected to different tissue culture conditions consisting of Murashige and Skoog medium and without sucrose [photoautotrophic (PAT) condition] or with 3% sucrose [photomixotrophic (PMT) condition]. Using gas chromatography-mass spectrometry, we identified a set of 51 different metabolites in leaf tissues during the rooting phase. Most growth parameters, such as shoot length, leaf fresh weight, leaf number, and leaf area/plant, were significantly lower under PMT than under PAT conditions. Moreover, photosynthesis was inhibited due to partial stomatal closure under PMT conditions. The metabolomic profiles along with principal component analysis and hierarchical cluster analysis revealed that the two treatments were characterized by distinct metabolic signatures. PAT leaves were characterized by the accumulation of urea and erythritol. In comparison, PMT leaves were characterized by the accumulation of metabolites belonging to the primary metabolism and catecholamines as well as compounds related to abiotic stress conditions, such as proline, hydroxyproline, asparagine, c-aminobutyric acid (GABA), soluble sugars, and myo-inositol.

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Section: Discussionmentioning

confidence: 99%

Metabolic profiling of photoautotrophic and photomixotrophic potato plantlets (Solanum tuberosum) provides new insights into acclimatization

Badr

Angers

Desjardins

2011

Plant Cell Tiss Organ Cult

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“…None of these compounds, however, activated AtGLR1.4, nor did dopamine and acetylcholine, which are also present in plants (25) (fig. S2).…”

Section: Atglr14-an Amino Acid-gated Ion Channelmentioning

confidence: 96%

A Plant Homolog of Animal Glutamate Receptors Is an Ion Channel Gated by Multiple Hydrophobic Amino Acids

et al. 2013

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Ionotropic glutamate receptors (iGluRs) are ligand-gated cation channels that mediate neurotransmission in animal nervous systems. Homologous proteins in plants have been implicated in root development, ion transport, and several metabolic and signaling pathways. AtGLR3.4, a plant iGluR homolog from Arabidopsis thaliana, has ion channel activity and is gated by asparagine, serine, and glycine. Using heterologous expression in Xenopus oocytes, we found that another Arabidopsis iGluR homolog, AtGLR1.4, functioned as a ligand-gated, nonselective, Ca(2+)-permeable cation channel that responded to an even broader range of amino acids, none of which are agonists of animal iGluRs. Seven of the 20 standard amino acids--mainly hydrophobic ones--acted as agonists, with methionine being most effective and most potent. Nine amino acids were antagonists, and four, including glutamate and glycine, had no effect on channel activity. We constructed a model of this previously uncharacterized ligand specificity and used knockout mutants to show that AtGLR1.4 accounts for methionine-induced membrane depolarization in Arabidopsis leaves.

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“…Out of the many chemicals that have been proposed to have regulatory roles, only five major groups (auxins, gibberellins, kinetins, abscisic acid, and ethylene) are truly established in the literature [Horgan, 1981], although the canon appears to have expanded recently to include candidates such as polyamines, salicylic acid, jasmonates, and brassinosteroids [Hedden, 1993]. The literature is full of additional candidates isolated from a variety of sources that are detectable endogenously in higher plants: mammalian-type catecholamines (epinephrine, norepinephrine, ldopa, and dopamine); the brassinosteroids; turgorins; and strigol and other promoters of seed germination in Striga asiatica [Gross and Parthier, 1994;Kuklin and Conger, 1995]. In addition, there is a large group of plant, fungal, and algal chemicals that promote or inhibit general plant or root growth.…”

Section: Introductionmentioning

confidence: 99%

Putative regulatory molecules in plants: evaluating melatonin

Tassel

O’Neill

2001

Journal of Pineal Research

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Numerous classes of chemicals have been considered as regulators of various aspects of plant growth and development. In evaluating these putative regulatory molecules, plant biologists have encountered a number of challenges, including: the problem of quantifying substances present at trace levels in extremely complex mixtures; difficulty in obtaining and interpreting phenotypic responses to exogenous applications; and, until recently, the inability to selectively alter endogenous levels of these substances. Melatonin (N-acetyl 5-methoxytryptamine), a methoxylated indoleamine, is a potential regulatory molecule found in plants. Although no specific phenotype is currently associated with melatonin or its analogs in higher plants, it has important and unique biological activity in many other taxa, from algae to primates. In these organisms, melatonin functions as a night signal, coordinating responses to diurnal and photoperiodic environmental cues. We assess the process by which melatonin has been evaluated in plants so far and find that many of the methods for melatonin analysis, which have been adopted from animal studies, are inappropriate for use with plant materials. Thus, despite some interesting preliminary reports, research supporting the case for melatonin as a plant regulator is still in its infancy.

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Catecholamines in plants

Cited by 53 publications

References 38 publications

Metabolic profiling of photoautotrophic and photomixotrophic potato plantlets (Solanum tuberosum) provides new insights into acclimatization

Metabolic profiling of photoautotrophic and photomixotrophic potato plantlets (Solanum tuberosum) provides new insights into acclimatization

A Plant Homolog of Animal Glutamate Receptors Is an Ion Channel Gated by Multiple Hydrophobic Amino Acids

Putative regulatory molecules in plants: evaluating melatonin

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