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Topic: Jasmonates

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Plant hormone

Abscisic acid

Germination

Plant growth substance

Brassinosteroids

	Entrez PubMed (Site not responding. Last check: 2007-10-29)
		Jasmonates induced swelling in mitochondria isolated from Hep 3B hepatoma cells, but not in mitochondria isolated from 3T3 nontransformed cells or from normal lymphocytes, in a PTPC-mediated manner.
		A correlation was found between cytotoxicity of methyl jasmonate and the percentage of leukemic cells in the blood of patients with chronic lymphocytic leukemia (CLL).
		Jasmonates induced membrane depolarization in CLL cells, and swelling and release of cytochrome c in mitochondria isolated from these cells.
	www.acor.org /abstracts/references.html?pmid=15753398 (285 words)

	kpeterman (Site not responding. Last check: 2007-10-29)
		Jasmonates, the best characterized of these in plants, are phytohormones which have been shown to effect a number of physiological processes including the regulation of gene expression.
		Jasmonates have also been implicated as signal transduction molecules in the response of plants to pathogen attack and wounding.
		We have demonstrated that this gene is induced in response to bacterial pathogen attack and by the phytohormones, methyl jasmonate and abscisic acid.
	www.wellesley.edu /Biology/Faculty/kpeterman.html (450 words)

	Jasmonate - Wikipedia, the free encyclopedia
		The jasmonates (JAs) are a group of plant hormones which help regulate plant growth and development.
		Like the related prostaglandin hormones found in mammals, the jasmonates are cyclopentanone derivatives which are derived biosynthetically from fatty acids.
		Jasmonates have been proposed to be signaling intermediates in the wound and/or elicitor-activated expression of plant defense genes.
	en.wikipedia.org /wiki/Jasmonate (242 words)

	[No title]
		Results: Jasmonic acid (JA) induced death in lymphoblastic leukemia cells and caused suppression of cell proliferation in melanoma, breast and prostate cancer cells.
		Jasmonates induced mitochondrial membrane depolarization and cell death via the permeability transition pore.
		We propose that jasmonates induce cell death through a cascade involving mitochondrial membrane perturbation, caspase-3 activation, JNK activation, and an increase in AP-1 activity.
	www.tau.ac.il /medicine/conf2002/F/F-27.doc (285 words)

	Differential Growth in Thigmotropism (Site not responding. Last check: 2007-10-29)
		The results of this study strongly suggest that the alpha-linolenic acid cascade to jasmonic acid and other jasmonates may be the central transduction mechanism coupling the mechanical stimulus to the growth response.
		To test whether the coiling response was due to jasmonates or ethylene, the researchers treated the tendrils with jasmonates in the presence of an ACC-synthetase inhibitor (AVG), and found that this had no effect on tendril coiling.
		Therefore, it appears that jasmonates are crucial in touch-stimulus signal transduction, while the roles of endogenous IAA and ethylene in tendril coiling remain somewhat uncertain.
	biology.kenyon.edu /edwards/project/steffan/frames/diffgro.htm (617 words)

	Plant oxylipins, jasmonates, lipoxygenases, structure, biochemistry and function
		The jasmonates are 12-carbon cyclic fatty acids derived from linolenic acid that have important signalling functions in plants.
		In addition, a number of further metabolites of jasmonic acid are formed in plants and have biological activity including methyl jasmonate, the formation of which is catalysed by S-adenosyl-L-methionine:jasmonic acid carboxyl methyltransferase.
		The tuber-inducing factor in potatoes, tuberonic acid or its glucopyranosyl derivative, is derived from jasmonic acid.
	www.lipidlibrary.co.uk /Lipids/eicplant/index.htm (1751 words)

	Octadecanoid-Derived Alteration of Gene Expression and the "Oxylipin Signature" in Stressed Barley Leaves. Implications ... (Site not responding. Last check: 2007-10-29)
		Gundlach H, Müller MJ, Kutchan TM, Zenk MH (1992) Jasmonic acid is a signal transducer in elicitor-induced plant cell cultures.
		Krumm T, Bandemer K, Boland W (1995) Induction of volatile biosynthesis in the lima bean (Phaseolus lunatus) by leucine- and isoleucine conjugates of 1-oxo- and 1-hydroxyindan-4-carboxylic acid: evidence for amino acid conjugates of jasmonic acid as intermediates in the octadecanoid signalling pathway.
		Lee J, Parthier B, Löbler M (1996) Jasmonate signalling can be uncoupled from abscisic acid signalling in barley: identification of jasmonate-regulated transcripts which are not induced by abscisic acid.
	www.plantphysiol.org /cgi/content/full/123/1/177 (5818 words)

	Application of methyl jasmonate on Picea abies (Pinaceae) stems induces defense-related responses in phloem and xylem ...
		Koda Y. 1992 The role of jasmonic acid and related compounds in the regulation of plant development.
		Sharan M. Taguchi K. Gonda T. Jouke M. Shimosaka N. Hayashida M. Okazaki 1998 Effects of methyl jasmonate and elicitor on the activation of phenylalanine ammonia-lyase and the accumulation of scopoletin and scopolin in tobacco cell cultures.
		Induction of Volatile Terpene Biosynthesis and Diurnal Emission by Methyl Jasmonate in Foliage of Norway Spruce
	www.amjbot.org /cgi/content/full/89/4/578 (5613 words)

	Plant Hormones - ninemsn Encarta
		Plant Hormones or phytohormones, substances that regulate most of the life-cycle events in plants, including germination, growth through cell division and elongation, flowering, fruit ripening, seed and bud dormancy, and death (see Plant: Growth and Differentiation).
		Five plant hormones have long been identified: auxin, cytokinin, gibberellin, abscisic acid, and ethene (previously known as ethylene).
		They also reduce senescence (ageing) and apical dominance (that is, straight growth from the bud of the main stem rather than side branching), and they stimulate production of various enzymes and proteins.
	au.encarta.msn.com /encyclopedia_1481506497/Plant_Hormones.html (349 words)

	Regulation of Jasmonate-mediated Plant Responses in Arabidopsis -- DEVOTO and TURNER 92 (3): 329 -- Annals of Botany (Site not responding. Last check: 2007-10-29)
		Concomitant activation of jasmonate and ethylene response pathways is required for induction of a plant defensin gene in Arabidopsis.
		Jasmonate signalling mutants of Arabidopsis are susceptible to the soil fungus Pythium irregulare.
		Jasmonate response locus JAR1 and several related Arabidopsis genes encode enzymes of the firefly luciferase superfamily that show activity on jasmonic, salicylic, and indole-3-acetic acids in an assay for adenylation.
	aob.oxfordjournals.org /cgi/content/full/92/3/329 (5353 words)

	Entrez-PubMed
		Allene oxide synthase, an enzyme of the octadecanoid pathway to jasmonates, was cloned from Arabidopsis thaliana as a full-length cDNA encoding a polypeptide of 517 amino acids with a calculated molecular mass of 58705 Da.
		From the sequence, an N-terminal transit peptide of 21 amino acids resembling chloroplast transit peptides was deduced.
		The data suggest parallel pathways to jasmonates from linolenic acid or linoleic acid in A. thaliana.
	www.plantbiology.msu.edu /lipids/genesurvey/activity_at5g42650.html (229 words)

	Jasmonates: Novel Anticancer Agents Acting Directly and Selectively on Human Cancer Cell Mitochondria -- Rotem et al. ...
		Jasmonates are a group of plant stress hormones (1).
		Jasmonates are cytotoxic toward peripheral blood lymphocytes from patients with CLL.
		Jasmonates induce mitochondrial perturbation in intact leukemic lymphocytes from patients with CLL and in mitochondria isolated from these cells.
	cancerres.aacrjournals.org /cgi/content/full/65/5/1984 (5325 words)

	lipoxygenase products
		Jasmonate was found in 1962 in Jasminum oil (Demole E et al., Helv Chim Acta 1962, 45, 675) and jasmonic acid was isolated in 1971 in a fungus culture (Aldridge DC et al., J Chem Soc 1971, C, 1623).
		Methyl jasmonate vapor is a powerful signal for the induction of proteinase inhibitor gene expression in the leaves of several plants.
		This compound is subsequently transformed into jasmonic acid, the true mediator of plant herbivore defense (Stelmach BA et al., J Biol Chem 2001, 276, 12832).
	www.cyberlipid.org /prost1/pros0002.htm (1457 words)

	Induction of Jasmonate Biosynthesis in Arbuscular Mycorrhizal Barley Roots -- Hause et al. 130 (3): 1213 -- PLANT ...
		Jasmonic acid (JA) and its derivatives, commonly termed jasmonates, are hormonal regulators involved in plant responses to
		Accumulation of endogenous jasmonates and of transcripts of AOS and JIP23 upon inoculation of barley roots with spores of G.
		Jasmonates and the conjugate were extracted and quantified from roots pooled from five different plants as indicated in "Materials and Methods." Three independent extractions and analyses were performed giving similar values that varied by about 15%.
	www.plantphysiol.org /cgi/content/full/130/3/1213 (4610 words)

	Mycorrhiza Literature Exchange
		Jasmonates have been reported to stimulate accumulation of indole alkaloids in plant cells.
		We demonstrated that jasmonic acid and methyl jasmonate applications result in increased hypaphorine concentration in Pisolithus microcarpus hyphae.
		Jasmonates and zeatin might therefore contribute to some steps of molecular dialogue, which modulates the development of functional ectomycorrhizae and maintain symbiotic hyphae in a characteristic juvenile stage.
	mycorrhiza.ag.utk.edu /latest/latest05/05_11jambo1.htm (149 words)

	Arabidopsis Jasmonate Signaling Pathway -- Gfeller et al. 2006 (322): cm1 -- Science's STKE
		In both cases, the involvement of the jasmonate pathway is complex, involving large-scale transcriptional reprogramming.
		In male fertility, jasmonic acid (JA) is the essential signal intervening both at the level of anther elongation and in pollen dehiscense.
		In the case of defense, at least two jasmonates, JA and its precursor 12-oxo-phytodienoic acid (OPDA), are necessary for the fine-tuning of defense gene expression in response to various microbial pathogens and arthropod herbivores.
	stke.sciencemag.org /cgi/content/abstract/stke.3222006cm1?rss=1 (430 words)

	Conserved MYC transcription factors play a key role in jasmonate signaling both in tomato and Arabidopsis -- Boter et ...
		Menke, F.L., Champion, A., Kijne, J.W., and Memelink, J. A novel jasmonate- and elicitor-responsive element in the periwinkle secondary metabolite biosynthetic gene Str interacts with a jasmonate- and elicitor-inducible AP2-domain transcription factor, ORCA2.
		Staswick, P.E., Su, W.P., and Howell, S.H. Methyl jasmonate inhibition of root-growth and induction of a leaf protein are decreased in an Arabidopsis thaliana mutant.
		Staswick, P.E., Yuen, G.Y., and Lehman, C.C. Jasmonate signaling mutants of Arabidopsis are susceptible to the soil fungus Pythium irregulare.
	www.genesdev.org /cgi/content/full/18/13/1577 (8141 words)

	Methyl jasmonate upregulates biosynthetic gene expression, oxidation and conjugation of polyamines, and inhibits shoot ...
		Methyl jasmonate upregulates biosynthetic gene expression, oxidation and conjugation of polyamines, and inhibits shoot formation in tobacco thin layers -- Biondi et al.
		Jasmonic acid is a signal transducer in elicitor-induced plant cell cultures.
		Jasmonic acid: effects on growth and development of isolated tomato roots cultured in vitro.
	jxb.oxfordjournals.org /cgi/content/full/52/355/231 (6397 words)

	Leibniz Institut für Pflanzenbiochemie: Natural Product Biotechnology
		The action of jasmonates (JA), a signal in plant stress responses and development, is studied by “gain of function” and “loss of function” experiments using transgenic approaches, by cell biological techniques and by analytical methods (HPLC-MS, GC-MS) (research group Wasternack/Miersch).
		Preferential interest is given to activation and function of the jasmonate biosynthesis gene allene oxide cyclase (AOC) and its alleles.
		Transgenic approaches, mutant analysis, promoter analysis and metabolite profiling of jasmonates and other oxylipins is done with tomato and Arabidopsis plants to find out the central role of AOC and JA in stress and developmental processes.
	www.ipb-halle.de /en/research/natural-product-biotechnology (264 words)

	New Hot Paper Comment by Claus Wasternack and Ivo Feussner
		Several of these compounds were shown to function as signals in plant responses to biotic and abiotic stress as well as in plant development.
		Plants respond to stress with membrane damage which is accompanied by lipid peroxidation initiated by the large enzyme family of lipoxygenases.
		In the eighties, the Institute of Plant Biochemistry, Halle/Saale, Germany, was among the first studying the occurrence and action of jasmonates.
	www.esi-topics.com /nhp/2004/january-04-Feussner-Wasternack.html (433 words)

	Methyl jasmonate- Plant Stress Hormone Inhibits Growth
		Methyl jasmonate, a plant stress hormone, inhibited proliferation and induced cell death in human prostate cancer cells in culture
		The jasmonates, consisting of cis-jasmone (CJ), methyl jasmonate (MJ), and jasmonic acid (JA) are a family of plant stress hormones.
		We studied the effects of the jasmonates on the proliferation of human prostate adenocarcinoma cell lines (PC-3, HTB-81) and the human fibroblast cell line (HFL-1) using the mitochondrial dehydrogenase activity (MTT) and the colony formation (CFA) assays.
	www.annieappleseedproject.org /metjasplanst.html (281 words)

	Jasmonate Biochemical Pathway -- Liechti and Farmer 2006 (322): cm3 -- Science's STKE
		-linolenic acid initiates jasmonate synthesis by providing a 13-hydroperoxide substrate for the formation of an unstable allene oxide that is then subject to enzyme-guided cyclization to produce 12-oxo-phytodienoic acid (OPDA).
		Each new family member that is discovered provides another key to understanding the fine control of gene expression in immune responses, in the initiation and maintenance of long-distance signal transfer in response to wounding, in the regulation of fertility, and in the turnover, inactivation, and sequestration of jasmonates, among other processes.
		The Jasmonate Biochemical Pathway provides an overview of the growing jasmonate family, and new members will be included in future versions of the Connections Map.
	stke.sciencemag.org /cgi/content/abstract/2006/322/cm3 (391 words)

	MONITORING THE EFFECT OF JASMONATES ON THE EXPRESSION OF RIPENING RELATED GENES IN TOMATO FRUIT DISKS BY CDNA MACROARRAY
		Jasmonates show numerous effects on plant growth and development.
		In recent years, it is well known that jasmonates are important as a mediator of wound- and stress-induced signal transduction and induce expression of a variety of genes involved in defensive response.
		To determine if jasmonates affect the expression of the genes involved in ripening, we screened 10,911 cDNA clones for jasmonates responsiveness by a cDNA macroarray procedure.
	www.actahort.org /books/682/682_13.htm (220 words)

	Botany online: Plant hormones - Phytohormones - Jasmonates - Jasmonic acid (Site not responding. Last check: 2007-10-29)
		(-) — jasmonic acid and it methyl esters are ubiquitous in plants.
		They have hormone properties, help regulating plant growth and development and they seem to participate in leaf senescence and in the defence mechanism against fungi.
		Jasmonates do not only regulate the transcription of these proteins, they do also influence the rate of translation of different groups of mRNA.
	www.biologie.uni-hamburg.de /b-online/e31/31f.htm (255 words)

	Eggcited Plants Call 911
		These warning signals take the form of volatile substances like jasmonic acid, which belongs to a group of chemicals called jasmonates.
		Jasmonates are hormones that regulate plant growth and development.
		For example, tobacco plants (Nicotiana attenuata) manufacture methyl jasmonate (MeJ) in response to the saliva secreted by the tobacco hornworm (Manduca sexta) onto wounded tobacco leaves as it grazes.
	www.hras.org /sw/Sw4-04.html (677 words)

	News - Releases
		One is based on jasmonates, natural compounds responsible for the characteristic aroma of jasmine flowers.
		El jasmonate ahora es usado por la industria de la fragancia y como condimentos en los alimentos.
		El jasmonate, como un compuesto natural, se puede utilizar específicamente para el mercado de la patata orgánica, el cual no utiliza el CIPC, según el químico de ARS Edward C. Lulai del Laboratorio de Investigación de Remolacha y Patata en Fargo, Dakota del Norte.
	www.seedquest.com /News/releases/usa/Usda/n4035.htm (663 words)

	Interactions between jasmonates and ethylene in the regulation of root hair development in Arabidopsis -- Zhu et al. 57 ...
		Interactions between jasmonates and ethylene in the regulation of root hair development in Arabidopsis -- Zhu et al.
		Methyl jasmonate inhibition of root growth and induction of a leaf protein are decreased in an Arabidopsis thaliana mutant.
		Plant defence genes are synergistically induced by ethylene and methyl jasmonate.
	jxb.oxfordjournals.org /cgi/content/full/57/6/1299 (4218 words)

	hormone.web
		Jasmonates are represented by Jasmonate and its methyl ester.
		They were first isolated from the jasmine plant in which the methyl ester is an important product in the perfume industry.
		Jasmonic acid is synthesized from linolenic acid which is an important fatty acid.
	www2.mcdaniel.edu /Biology/botf99/hormweb/hormone.web.html (631 words)

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