The swansong of petal cell death: insights into the mechanism and regulation of ethylene-mediated flower senescence

Parveen, Shazia; Altaf, Foziya; Farooq, Sumira; Lone, Mohammad Lateef; Haq, Aehsan Ul; Tahir, Inayatullah

doi:10.1093/jxb/erad217

Cited by 9 publications

(5 citation statements)

References 138 publications

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“…Ethylene regulates processes like seed germination and responses to environmental stimuli [47]. The CBL-CIPK pathway affects ethylene biosynthesis and gene expression [48][49][50].…”

Section: Crosstalk Between Cbl-cipk and Ethylene Signaling Pathways I...mentioning

confidence: 99%

Molecular Mechanisms of CBL-CIPK Signaling Pathway in Plant Abiotic Stress Tolerance and Hormone Crosstalk

Kaya,

Uğurlar,

Adamakis

2024

IJMS

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Abiotic stressors, including drought, salt, cold, and heat, profoundly impact plant growth and development, forcing elaborate cellular responses for adaptation and resilience. Among the crucial orchestrators of these responses is the CBL-CIPK pathway, comprising calcineurin B-like proteins (CBLs) and CBL-interacting protein kinases (CIPKs). While CIPKs act as serine/threonine protein kinases, transmitting calcium signals, CBLs function as calcium sensors, influencing the plant’s response to abiotic stress. This review explores the intricate interactions between the CBL-CIPK pathway and plant hormones such as ABA, auxin, ethylene, and jasmonic acid (JA). It highlights their role in fine-tuning stress responses for optimal survival and acclimatization. Building on previous studies that demonstrated the enhanced stress tolerance achieved by upregulating CBL and CIPK genes, we explore the regulatory mechanisms involving post-translational modifications and protein–protein interactions. Despite significant contributions from prior research, gaps persist in understanding the nuanced interplay between the CBL-CIPK system and plant hormone signaling under diverse abiotic stress conditions. In contrast to broader perspectives, our review focuses on the interaction of the pathway with crucial plant hormones and its implications for genetic engineering interventions to enhance crop stress resilience. This specialized perspective aims to contribute novel insights to advance our understanding of the potential of the CBL-CIPK pathway to mitigate crops’ abiotic stress.

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“…Ethylene regulates processes like seed germination and responses to environmental stimuli [47]. The CBL-CIPK pathway affects ethylene biosynthesis and gene expression [48][49][50].…”

Section: Crosstalk Between Cbl-cipk and Ethylene Signaling Pathways I...mentioning

confidence: 99%

Molecular Mechanisms of CBL-CIPK Signaling Pathway in Plant Abiotic Stress Tolerance and Hormone Crosstalk

Kaya,

Uğurlar,

Adamakis

2024

IJMS

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“…The latter requires the selective and programmed elimination of groups of cells of entire organs (i.e., leaves, petals, tubers, stamina, fruits, pollen, etc.) [4][5][6][7][8][9][10][11][12] or even of the entire organism that are no longer necessary (as, for example, monocarpic plants after seed production). In some cases, PCD can be induced by a lot of occasional external factors, like environmental stresses and pathogen infections [13,14].…”

Section: Introduction Development and Pcdmentioning

confidence: 99%

Programmed Cell Death Reversal: Polyamines, Effectors of the U-Turn from the Program of Death in Helianthus tuberosus L.

Serafini-Fracassini,

Del Duca

2024

IJMS

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This review describes a 50-year-long research study on the characteristics of Helianthus tuberosus L. tuber dormancy, its natural release and programmed cell death (PCD), as well as on the ability to change the PCD so as to return the tuber to a life program. The experimentation on the tuber over the years is due to its particular properties of being naturally deficient in polyamines (PAs) during dormancy and of immediately reacting to transplants by growing and synthesizing PAs. This review summarizes the research conducted in a unicum body. As in nature, the tuber tissue has to furnish its storage substances to grow vegetative buds, whereby its destiny is PCD. The review’s main objective concerns data on PCD, the link with free and conjugated PAs and their capacity to switch the destiny of the tuber from a program of death to one of new life. PCD reversibility is an important biological challenge that is verified here but not reported in other experimental models. Important aspects of PA features are their capacity to change the cell functions from storage to meristematic ones and their involvement in amitosis and differentiation. Other roles reported here have also been confirmed in other plants. PAs exert multiple diverse roles, suggesting that they are not simply growth substances, as also further described in other plants.

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“…In plants, programmed cell death (PCD) is a cell death process that is spontaneous and genetically regulated in a specific time and space through the action of endogenous developmental signals or exogenous environmental signals and is prevalent in all processes of plant growth and development [1]; for example, PCD controls root organ size and promotes optimal root growth [2]. Past studies have found that PCD was present throughout the flower opening and senescence of petals [3], and during seed germination, endosperm cells first underwent degradation and death, followed by the death of aleurone layer cells, which PCD mediated in a tightly controlled spatiotemporal pattern [4]. Furthermore, the plant PCD process is regulated by a range of signals, such as plant hormones, reactive oxygen species (ROS), calcium ions (Ca 2+ ), and nitric oxide (NO), which cross-react extensively with each other to induce PCD through different pathways [5,6].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study on Programmed Cell Death during Calyx Abscission of Korla Fragrant Pear

Wen,

Shao,

Hao

et al. 2024

Horticulturae

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Programmed cell death (PCD) is common in plant growth and development, such as xylem development, organ senescence, and abscission. Calyx abscission in Korla fragrant pear contributes to fruit quality, while it was not clear whether PCD occurred during calyx abscission and which signals regulated the process. Therefore, it is imperative to clarify the process of PCD in the process of calyx abscission in Korla fragrant pear under natural conditions to enrich the mechanism of calyx abscission. The results showed that the total time of calyx abscission of Korla fragrant pear began from 6 days after pollination (DAP) to 13 DAP, and the peak of calyx abscission occurred 10 DAP. During the whole process of calyx abscission, PCD started 6 DAP. At 9 DAP, the degree of PCD deepened. At 12 DAP, the cells in the abscission zone showed asymmetry on both sides, the organelles in the distal cells of the abscission zone degraded into apoptotic fragments, and the protective layer of the normal development of cells located at the proximal end of the abscission zone region ended the PCD process. ETH concentrations in the abscission zone of the decalyx fruit were significantly higher than those of the persistent calyx fruits in each period during calyx abscission, and high levels of ethylene and hydrogen peroxide and low contents of the GA3, ZT, and hydroxyl radicals promoted calyx abscission before the formation of the abscission zone. At 3 DAP, the ethylene concentration (43.97 ppm) and H2O2 content (8.49 μmol/g) of decalyx fruit in the abscission zone were significantly higher than those of persistent calyx fruit by 67.69% and 27.86%, respectively; however, the GA3, ZT, and hydroxyl radicals showed the opposite. Overall, PCD in the abscission zone of decalyx fruits did occur during the calyx abscission of Korla fragrant pear, and ethylene and H2O2 might play major roles in initiating the PCD process during Korla fragrant pear calyx abscission.

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The swansong of petal cell death: insights into the mechanism and regulation of ethylene-mediated flower senescence

Cited by 9 publications

References 138 publications

Molecular Mechanisms of CBL-CIPK Signaling Pathway in Plant Abiotic Stress Tolerance and Hormone Crosstalk

Molecular Mechanisms of CBL-CIPK Signaling Pathway in Plant Abiotic Stress Tolerance and Hormone Crosstalk

Programmed Cell Death Reversal: Polyamines, Effectors of the U-Turn from the Program of Death in Helianthus tuberosus L.

Preliminary Study on Programmed Cell Death during Calyx Abscission of Korla Fragrant Pear

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