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methyl jasmonate/tabak
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Seite 1 von 183 Ergebnisse
Plant-plant signaling: application of trans- or cis-methyl jasmonate equivalent to sagebrush releases does not elicit direct defenses in native tobacco.
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Nicotiana attenuata plants growing in close proximity to damaged sagebrush (Artemisia tridentata ssp. tridentata) suffer less herbivory than plants near undamaged sagebrush. Sagebrush constitutively releases methyl jasmonate (MeJA), a compound that when applied directly to N. attenuata, elicits
Effect of volatile methyl jasmonate on the oxylipin pathway in tobacco, cucumber, and arabidopsis.
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The effect of atmospheric methyl jasmonate on the oxylipin pathway was investigated in leaves of tobacco (Nicotiana tabacum L.), cucumber (Cucumis sativa L.), and Arabidopsis thaliana (L.). Differential sensitivities of test plants to methyl jasmonate were observed. Thus, different concentrations of
An mRNA of tobacco cell, which is rapidly inducible by methyl jasmonate in the presence of cycloheximide, codes for a putative glycosyltransferase.
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Two-dimensional gel electrophoretic display of polypeptides labeled in vivo and those synthesized in vitro from poly(A)(+)-RNA indicated that treatment of cultured cells of tobacco (Nicotiana tabacum) BY-2 with methyl jasmonate (MeJA) induces accumulation of a limited number of specific mRNAs within
Methyl jasmonate disrupts shoot formation in tobacco thin cell layers by over-inducing mitotic activity and cell expansion.
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The aim of the present study was to determine early cyto-histological events associated with the reduced number of shoots formed at the end of culture in tobacco (Nicotiana tabacum L.) thin cell layers treated with methyl jasmonate (MJ) [S. Biondi et al. (2001) J Exp Bot 52:1-12]. The results show
Expression of an antisense Datura stramonium S-adenosylmethionine decarboxylase cDNA in tobacco: changes in enzyme activity, putrescine-spermidine ratio, rhizogenic potential, and response to methyl jasmonate.
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S-adenosylmethionine decarboxylase activity (SAMDC; EC 4.1.1.21) leads to spermidine and spermine synthesis through specific synthases which use putrescine, spermidine and decarboxylated S-adenosylmethionine as substrates. In order to better understand the regulation of polyamine (PA), namely
Anatalline and other methyl jasmonate-inducible nicotine alkaloids from Nicotiana tabacum cv. By-2 cell cultures.
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Anatalline [2,4-di(3-pyridyl)piperidine] accumulation was shown to be induced by methyl jasmonate in Nicotiana tabacum cv. BY-2 cell cultures. Beside anatabine, anatalline represented the most abundant alkaloid, moreover, it was always present in two isomeric forms occurring always in similar
Molecular analysis of alkaloid metabolism in AABB v. aabb genotype Nicotiana tabacum in response to wounding of aerial tissues and methyl jasmonate treatment of cultured roots
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Synthesis of the wound-inducible alkaloid, nicotine, in roots of the allotetraploid species Nicotiana tabacum L. is strongly influenced by the presence of two non-allelic genes, A and B. Together, these loci affect baseline transcript levels of genes dedicated to secondary metabolism (e.g. PMT and
WAPK, a Ser/Thr protein kinase gene of Nicotiana tabacum, is uniquely regulated by wounding, abscisic acid and methyl jasmonate.
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A cDNA encoding a protein kinase, which may be involved in the wound signal transduction pathway, was isolated from Nicotiana tabacum. The cDNA, named WAPK, is 1227 bp in length and contains an ORF of 1017 bp. The ORF encodes a polypeptide of 339 amino acids, with a calculated molecular mass of
Methyl jasmonate and cis-jasmone do not dispose of the herbivore-induced jasmonate burst in Nicotiana attenuata.
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The oxylipin pathway mediates wound- and herbivore-induced defense reactions in Nicotiana attenuata as evidenced by a transient jasmonic acid (JA)-burst that precedes these defense responses. The fate of this induced JA-burst remains unknown. Two derivatives of JA, its methylester, methyl jasmonate
Methyl jasmonate upregulates biosynthetic gene expression, oxidation and conjugation of polyamines, and inhibits shoot formation in tobacco thin layers.
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The effect of methyl jasmonate (MJ) on de novo shoot formation and polyamine metabolism was investigated in thin layer explants of tobacco (Nicotiana tabacum L. cv. Samsun). A relatively low concentration of MJ (0.1 microM) enhanced explant fresh weight, but had no effect on the final number of
Early signaling network in tobacco cells elicited with methyl jasmonate and cyclodextrins.
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We analyze, for the first time, the early signal transduction pathways triggered by methyl jasmonate (MJ) and cyclodextrins (CDs) in tobacco (Nicotiana tabacum) cell cultures, paying particular attention to changes in cytosolic free Ca(2+) concentration ([Ca(2+)](cyt)), the production of hydrogen
Methyl jasmonate induced expression of the tobacco putrescine N -methyltransferase genes requires both G-box and GCC-motif elements.
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Putrescine N-methyltransferase (PMT) catalyzes the first committed step of nicotine biosynthesis, converting putrescine into N-methylputrescine. A variety of chemical, environmental, and developmental cues have been implicated in its regulation. Here we have examined the differential expression of
Rapid alkalinization factors in poplar cell cultures. Peptide isolation, cDNA cloning, and differential expression in leaves and methyl jasmonate-treated cells.
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A family of peptides inducing rapid pH alkalinization in hybrid poplar (Populus trichocarpa x Populus deltoides) cell culture medium was isolated from hybrid poplar leaves. Five related approximately 5-kD peptides were purified by high-performance liquid chromatography and analyzed by
Reactive carbonyl species mediate methyl jasmonate-induced stomatal closure
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Production of reactive oxygen species (ROS) is a key signal event for methyl jasmonate (MeJA)- and abscisic acid (ABA)-induced stomatal closure. We recently showed that reactive carbonyl species (RCS) stimulates stomatal closure as an intermediate downstream of hydrogen peroxide (H2O2) production in
Regulation of expression of proteinase inhibitor genes by methyl jasmonate and jasmonic Acid.
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Gel electrophoretic analysis of the proteinase inhibitor proteins induced in tomato leaves by airborne methyl jasmonate (EE Farmer, CA Ryan [1990] Proc Natl Acad Sci USA 87: 7713-7716) revealed the new appearance of inhibitors I and II and two other, higher molecular mass proteins (63.5 and 87
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