Jasmonates promote abscission in bean petiole expiants: Its relationship to the metabolism of cell wall polysaccharides and cellulase activity

Ueda, Junichi; Miyamoto, Kazuaki; Hashimoto, Masatomo

doi:10.1007/bf00190583

Cited by 51 publications

(37 citation statements)

References 27 publications

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“…The above probably impairs the transport of nutrients across membranes, and it inhibits seedling growth, which was demonstrated in our previous studies [20,26]. One of the first discovered biological activities of MJ was the promotion of senescence in oat (Avena sativa) leaves [9,10]. In the present study, clear symptoms of senescence were also noted in the roots of buckwheat seedlings.…”

Section: Discussionsupporting

confidence: 76%

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Methyl jasmonate vapors affect the composition and peroxidation of major fatty acids in common buckwheat seedlings

et al. 2016

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The effect of methyl jasmonate (MJ) vapors on the composition and peroxidation of major fatty acids in the organs of common buckwheat seedlings was investigated. The composition of fatty acids in the hypocotyl and cotyledons of seedlings changed significantly under exposure to MJ vapors in closed jars. Four-day exposure to MJ led to a significant reduction in the concentrations of stearic, linoleic, and linolenic acids in the hypocotyl, whereas oleic acid levels increased approximately 3.5-fold. A decrease in stearic acid levels and an increase in the content of linolenic acid were noted in cotyledons, whereas oleic acid levels decreased in roots. Seven-day exposure to MJ vapor caused a further reduction in stearic acid content and an increase in oleic acid and linoleic acid levels in the hypocotyl. At the same time, the linoleic acid content of roots and linolenic acid levels in cotyledons were doubled, but a 5-fold reduction in linolenic acid concentrations was observed in roots. Methyl jasmonate intensified fatty acid peroxidation in cotyledons after 4 and 7 days and in roots after 4 days of exposure. Peroxidation was inhibited in the hypocotyl and roots after 7 days. The noted changes in the composition and peroxidation of fatty acids are probably indicative of senescence in buckwheat seedlings under the influence of MJ. Senescence seems to proceed faster in cotyledons than in other organs of buckwheat seedlings.

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Section: Discussionsupporting

confidence: 76%

“…In photosynthetic tissues, MJ can lead to disorganization of thylakoid membranes of chloroplasts [8]. Exogenous MJ inhibits growth and stimulates senescence processes in plants [9][10][11]. Senescence compromises the integrity of cellular membranes [12,13].…”

Section: Introductionmentioning

confidence: 99%

Methyl jasmonate vapors affect the composition and peroxidation of major fatty acids in common buckwheat seedlings

et al. 2016

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“…High JA biosynthetic gene expression at stage 12 likely attests to requirements for JA in anther filament elongation, anther dehiscence, and pollen viability (Sanders et al, 2000;Stintzi and Browse, 2000). Down-regulation of JA biosynthesis was unexpected in that both JA and MeJA promote abscission when applied externally (Ueda et al, 1996;Miyamoto et al, 1997;Hartmond et al, 2000). In citrus (Citrus sinensis), external application of MeJA or the structural and functional JA analog coronatine likely induces abscission by stimulating levels of ethylene (Hartmond et al, 2000;Burns et al, 2003).…”

Section: Cluster 7 Contains Multiple Down-regulated Genes Of Ja Biosymentioning

confidence: 99%

“…In citrus (Citrus sinensis), external application of MeJA or the structural and functional JA analog coronatine likely induces abscission by stimulating levels of ethylene (Hartmond et al, 2000;Burns et al, 2003). In bean (Phaseolus vulgaris), no ethylene production was evident following JA or MeJA-induced abscission (Ueda et al, 1996) although JA significantly promotes senescence (Ueda and Kato, 1982;Ueda et al, 1991). In Arabidopsis, exogenous JA also elicits premature senescence (He et al, 2002).…”

Section: Cluster 7 Contains Multiple Down-regulated Genes Of Ja Biosymentioning

confidence: 99%

Stamen Abscission Zone Transcriptome Profiling Reveals New Candidates for Abscission Control: Enhanced Retention of Floral Organs in Transgenic Plants Overexpressing ArabidopsisZINC FINGER PROTEIN2

2008

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Organ detachment requires cell separation within abscission zones (AZs). Physiological studies have established that ethylene and auxin contribute to cell separation control. Genetic analyses of abscission mutants have defined ethylene-independent detachment regulators. Functional genomic strategies leading to global understandings of abscission have awaited methods for isolating AZ cells of low abundance and very small size. Here, we couple laser capture microdissection of Arabidopsis thaliana stamen AZs and GeneChip profiling to reveal the AZ transcriptome responding to a developmental shedding cue. Analyses focus on 551 AZ genes (AZ 551 ) regulated at the highest statistical significance (P # 0.0001) over five floral stages linking prepollination to stamen shed. AZ 551 includes mediators of ethylene and auxin signaling as well as receptor-like kinases and extracellular ligands thought to act independent of ethylene. We hypothesized that novel abscission regulators might reside in disproportionately represented Gene Ontology Consortium functional categories for cell wall modifying proteins, extracellular regulators, and nuclear-residing transcription factors. Promoter-b-glucuronidase expression of one transcription factor candidate, ZINC FINGER PROTEIN2 (AtZFP2), was elevated in stamen, petal, and sepal AZs. Flower parts of transgenic lines overexpressing AtZFP2 exhibited asynchronous and delayed abscission. Abscission defects were accompanied by altered floral morphology limiting pollination and fertility. Hand-pollination restored transgenic fruit development but not the rapid abscission seen in wild-type plants, demonstrating that pollination does not assure normal rates of detachment. In wild-type stamen AZs, AtZFP2 is significantly up-regulated postanthesis. Phenotype data from transgene overexpression studies suggest that AtZFP2 participates in processes that directly or indirectly influence organ shed.

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“…This indicates that the mechanism of flower inhibition by jasmonates is independent. Independent action of both hormones in the regulation of other physiological processes is observed also in forming the abscission zone in bean explants (Ueda et al 1996).…”

Section: Discussionmentioning

confidence: 83%

Independent effects of jasmonates and ethylene on inhibition of Pharbitis nil flowering

et al. 2010

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Interactions between methyl jasmonate (JA-Me) and ethylene in the photoperiodic flower induction of shortday plant Pharbitis nil were investigated. Both JA-Me and gaseous ethylene applied during the inductive long night caused a decrease in the number of flower buds generated by P. nil. Application of ethylene did not affected niether the level of endogenous jasmonates in the cotyledons during the 16 h long inductive night, nor the inhibitory effect of JA-Me on the flowering of P. nil accompanied by variations in ethylene production. The application of acetylsalicylic acid (aspirin)-a jasmonate biosynthesis inhibitor-slightly stimulated flowering. Our results have shown that the mechanisms of P. nil flower inhibition by jasmonates and ethylene are independent.

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Jasmonates promote abscission in bean petiole expiants: Its relationship to the metabolism of cell wall polysaccharides and cellulase activity

Cited by 51 publications

References 27 publications

Methyl jasmonate vapors affect the composition and peroxidation of major fatty acids in common buckwheat seedlings

Methyl jasmonate vapors affect the composition and peroxidation of major fatty acids in common buckwheat seedlings

Stamen Abscission Zone Transcriptome Profiling Reveals New Candidates for Abscission Control: Enhanced Retention of Floral Organs in Transgenic Plants Overexpressing ArabidopsisZINC FINGER PROTEIN2

Independent effects of jasmonates and ethylene on inhibition of Pharbitis nil flowering

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