Methyl jasmonate-dependent senescence of cotyledons in Ipomoea nil

Wilmowicz, Emilia; Kućko, Agata; Frankowski, Kamil; Świdziński, Michał; Marciniak, Katarzyna; Kopcewicz, Jan

doi:10.1007/s11738-016-2244-1

Cited by 6 publications

(6 citation statements)

References 74 publications

(81 reference statements)

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“…In our dataset AOS ( At5 g42650 (Jang et al, 2014;Seo et al, 2001), is expressed highly in the TOP and MID internodes (FC > 3 with respect to CBOT). However, this gene is expressed at high levels also in FBOT, where it may be involved in senescing processes (Wilmowicz et al, 2016), which are ongoing in older regions of the stems. C5 is also characterized by genes involved in auxin and indolecontaining compound metabolic process (Data S1).…”

Section: Goe Analysis Of the Internodes At The Top And Middlementioning

confidence: 99%

Cell wall composition and transcriptomics in stem tissues of stinging nettle (Urtica dioica L.): Spotlight on a neglected fibre crop

et al. 2019

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Stinging nettle ( Urtica dioica L.) produces silky cellulosic fibres, as well as bioactive molecules. To improve the knowledge on nettle and enhance its opportunities of exploitation, a draft transcriptome of the “clone 13” (a fibre clone) is here presented. The transcriptome of whole internodes sampled at the top and middle of the stem is then compared with the core and cortical tissues sampled at the bottom. Young internodes show an enrichment in genes involved in the biosynthesis of phytohormones (auxins and jasmonic acid) and secondary metabolites (flavonoids). The core of internodes collected at the bottom of the stem is enriched in genes partaking in different aspects of secondary cell wall formation (cellulose, hemicellulose, lignin biosynthesis), while the cortical tissues reveal the presence of a C starvation signal probably due to the UDP‐glucose demand necessary for the thickening phase of bast fibres. Cell wall analysis indicates a difference in rhamnogalacturonan structure/composition of mature bast fibres, as evidenced by the higher levels of galactose measured, as well as the occurrence of more water‐soluble pectins in elongating internodes. The targeted quantification of phenolics shows that the middle internode and the cortical tissues at the bottom have higher contents than top internodes. Ultrastructural analyses reveal the presence of a gelatinous layer in bast fibres with a lamellar structure. The data presented will be an important resource and reference for future molecular studies on a neglected fibre crop.

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Section: Goe Analysis Of the Internodes At The Top And Middlementioning

confidence: 99%

Cell wall composition and transcriptomics in stem tissues of stinging nettle (Urtica dioica L.): Spotlight on a neglected fibre crop

et al. 2019

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“…Exogenous application of JA to flower petals of Phalaenopsis promoted senescence [78]. In contrast, endogenous levels of JA did not increase during the senescence of Lilium flower petals [79], and JA levels decreased while MeJA levels increased in senescing cotyledons of Ipomoea nil [80]. There are still insufficient data to confirm the promotive role of JA in root senescence; however, our results indicating variations of JA and MeJA content in senescent roots of Populus suggest that these phytohormones can be a metabolic signature of senescence.…”

Section: Discussionmentioning

confidence: 91%

Abscisic Acid and Jasmonate Metabolisms Are Jointly Regulated During Senescence in Roots and Leaves of Populus trichocarpa

Wojciechowska

Wilmowicz

Marzec-Schmidt

et al. 2020

IJMS

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Plant senescence is a highly regulated process that allows nutrients to be mobilized from dying tissues to other organs. Despite that senescence has been extensively studied in leaves, the senescence of ephemeral organs located underground is still poorly understood, especially in the context of phytohormone engagement. The present study focused on filling this knowledge gap by examining the roles of abscisic acid (ABA) and jasmonate in the regulation of senescence of fine, absorptive roots and leaves of Populus trichocarpa. Immunohistochemical (IHC), chromatographic, and molecular methods were utilized to achieve this objective. A transcriptomic analysis identified significant changes in gene expression that were associated with the metabolism and signal transduction of phytohormones, especially ABA and jasmonate. The increased level of these phytohormones during senescence was detected in both organs and was confirmed by IHC. Based on the obtained data, we suggest that phytohormonal regulation of senescence in roots and leaves is organ-specific. We have shown that the regulation of ABA and JA metabolism is tightly regulated during senescence processes in both leaves and roots. The results were discussed with respect to the role of ABA in cold tolerance and the role of JA in resistance to pathogens.

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“…Jasmon compounds, called jasmonates, occur in almost all tissues of higher plants, i.e., flower plants, bryophytes and ferns, where they play the role of endogenous regulators of growth and development [4]. They are present in, among others, stems, roots, tubers, leaves, flowers, fruits and pollen.…”

Section: Jasmonic Acid and Its Derivatives Occurring In Plantsmentioning

confidence: 99%

Jasmonate Compounds and Their Derivatives in the Regulation of the Neoplastic Processes

Jarocka-Karpowicz

Markowska

2021

Molecules

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Cancer is a serious problem in modern medicine, mainly due to the insufficient effectiveness of currently available therapies. There is a particular interest in compounds of natural origin, which can be used in the prophylaxis, as well as in the treatment and support of cancer treatment. One such compound is jasmonic acid (3-oxo-2-(pent-2’-enyl)cyclopentane acetic acid; isolated active form: trans-(-)-(3R,7R)- and cis-(+)-(3R,7S)-jasmonic acid) and its derivatives, which, due to their wide range of biological activities, are also proposed as potential therapeutic agents. Therefore, a review of literature data on the biological activity of jasmonates was prepared, with particular emphasis on the mechanisms of jasmonate action in neoplastic diseases. The anti-tumor activity of jasmonate compounds is based on altered cellular ATP levels; induction of re-differentiation through the action of Mitogen Activated Protein Kinases (MAPKs); the induction of the apoptosis by reactive oxygen species. Jasmonates can be used in anti-cancer therapy in combination with other known drugs, such as cisplatin, paclitaxel or doxorubicin, showing a synergistic effect. The structure–activity relationship of novel jasmonate derivatives with anti-tumor, anti-inflammatory and anti-aging effects is also shown.

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Methyl jasmonate-dependent senescence of cotyledons in Ipomoea nil

Cited by 6 publications

References 74 publications

Cell wall composition and transcriptomics in stem tissues of stinging nettle (Urtica dioica L.): Spotlight on a neglected fibre crop

Cell wall composition and transcriptomics in stem tissues of stinging nettle (Urtica dioica L.): Spotlight on a neglected fibre crop

Abscisic Acid and Jasmonate Metabolisms Are Jointly Regulated During Senescence in Roots and Leaves of Populus trichocarpa

Jasmonate Compounds and Their Derivatives in the Regulation of the Neoplastic Processes

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