Effect of cycloheximide on some physiological changes associated with senescence of detached flowers of Iris germanica L.

Sultan, Sheikh M.; Farooq, Sumira

doi:10.1007/s11738-997-0021-x

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…Upregulated expression of protease genes, raised enzymatic activity and a decline in soluble protein levels have been found to occur consistently during senescence, both in ethylene sensitive and ethyleneinsensitive flowers (Panavas et al, 1999;Eason et al, 2002;Wagstaff et al, 2002;Jones et al, 2005). Large losses in the protein levels during senescence have been reported prior to wilting in such flowers as Ipomoea, Hemerocallis and Petunia (Matile & Winkenbach, 1971;Lay-yee et al, 1992;Sultan & Farooq, 1996;Gulzar, 2003). A slight reduction in total protein content of petal tissues has been observed during senescence in flowers such as Consolida, Digitalis and potted Chrysanthemum prior to abscission suggesting that the extent of protein loss is least in species showing petal abscission rather than wilting (Stead & Moore, 1983;Williams et al, 1995;Shahri & Tahir, 2010).…”

Section: Protein Synthesis and Degradationmentioning

confidence: 99%

“…Treatment of flowers with compounds that inhibit protein synthesis, have been found to delay the visible symptoms of petal senescence, revealing that active protein synthesis is required for the execution of cell death in petals (Lay-yee et al, 1992;Celikel & van Doorn, 1995;Sultan & Farooq, 1997;Wagstaff et al, 2002;Xu et al, 2007;Shahri & Tahir 2010). The ultrastructural data indicates that floral abscission too requires high protein synthesis and secretory activity of material towards cell walls of the abscission zone cells (van Doorn & Stead, 1997).…”

Section: Protein Synthesis and Degradationmentioning

confidence: 99%

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Flower Senescence-Strategies and Some Associated Events

Shahri

Tahir

2011

Bot. Rev.

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Different strategies of petal senescence and some important events associated with it have been discussed. On the basis of sensitivity to ethylene and associated symptoms of senescence, petal senescence has been classified into five different classes; besides changes in membrane permeability, autophagy and involvement of VPEs (Vacuolar processing enzymes), degradation of nucleic acids, protein turn over and remobilization of essential nutrients during petal senescence have been discussed. Nucleus appears to play a central role in administrating the execution of the events associated with petal senescence. Protein turn over appears to be an important factor governing petal senescence in both ethylene-sensitive and ethylene-insensitive flower systems and that the loss of membrane integrity, vacuolar autophagy and remobilization of essential nutrients being its important consequences. Autophagy seems to be a main process responsible for cell dismantling and remobilization of macromolecules besides final disintegration of nucleus. A large number of senescence-associated genes have been found to be differentially expressed during petal senescence. On the basis of the available literature, a schematic model representing some important events associated with petal senescence has been constructed. The review recommends that more elaborate work is required at cellular and organelle level to understand the ethylene-independent pathway and its execution in both ethylene-sensitive and ethylene-insensitive flower systems. It also recommends that ethylene sensitivity should not be generally assigned to plants at the family level on the basis of response of a few species in a family.Résumés des stratégies différentes de pétale senescence et certains événements importants associés ont été discutés. Sur la base d'une sensibilité d'éthylène et les symptômes associés de sénescence, pétale senescence ont été classé en cinq différentes classes ; outre les modifications dans la perméabilité de la membrane, Autophagie et l'implication des VPEs (Vacuolar traitement des enzymes), la dégradation des acides nucléiques, protéines tour sur re de nutriments essentiels au cours de la senescence pétale ont été discutés. Noyau semble jouer un rôle central dans l'administration de l'exécution des événements associés pétale senescence. Tour de protéines sur semble être un facteur important régissant pétale senescence Bot. Rev. (2011) 77:152-184 dans les systèmes de fleur d'éthylène sensibles et éthylène-insensible et que la perte d'intégrité de la membrane, Autophagie vacuolar et re de nutriments essentiels à ses conséquences importantes. Autophagie semble être un processus principal responsable du démantèlement de la cellule et re de macromolécules outre finale désintégration du noyau. Un grand nombre de gènes associés senescence a été trouvé pour être exprimé différemment au cours de la senescence pétale. Sur la base de la documentation disponible, un modèle schematic représentant certains événe-ments importants associés pétale senescence a ét...

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Section: Protein Synthesis and Degradationmentioning

confidence: 99%

Section: Protein Synthesis and Degradationmentioning

confidence: 99%

Flower Senescence-Strategies and Some Associated Events

Shahri

Tahir

2011

Bot. Rev.

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“…Abebie et al, 2008;Chung et al, 2008;Guirimand et al, 2012). Longer incubation times of several hours may be necessary when working with whole-plant systems where it can take time for the CHX to be delivered to the tissues of interest (Sultan and Farooq, 1997;Truitt et al, 2004). However, it is essential to develop experiments that optimize the uptake of the CHX so as to detect direct effects (if any) as quickly as possible.…”

Section: Uv-b Contribution To Chiloglottone 1 Production and The Role Of De Novo Protein Synthesismentioning

confidence: 99%

UV-B light contributes directly to the synthesis of chiloglottone floral volatiles

et al. 2015

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The sepals and petals of Chiloglottis orchids strongly block UV-B wavelengths of light, preventing chiloglottone production inside the bud. While initiation of chiloglottone biosynthesis requires only UV-B light, sustained chiloglottone biosynthesis requires both UV-B and de novo protein biosynthesis. The internal amounts of chiloglottone in a flower reflect the interplay between developmental stage, duration and intensity of UV-B exposure, de novo protein synthesis, and feedback loops linked to the starting amount of chiloglottone. It is concluded that UV-B light contributes directly to chiloglottone biosynthesis. These findings suggest an entirely new and unexpected biochemical reaction that might also occur in taxa other than these orchids.

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“…Flower senescence represents the last stage of floral development and results in wilting or abscission of whole flowers or flower parts [17] . The length of the flowering period is related to many factors, including temperature, nutrition, and other external environmental factors.…”

Section: Introductionmentioning

confidence: 99%

Inducing Expression of the BAS1 Gene via the SAG12 Promoter to Delay Flower and Plant Senescence in Transgenic Petunia hybrida

Zhao

2019

Preprint

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Background: Brassinosteroids (BRs) are essential hormones that play crucial roles in plant growth, reproduction and response to abiotic and biotic stress. Results: In transgenic Petunia hybrida , resulting in short stature, dark green leaves, and slowed aging.We demonstrate that the exogenous expression of the SAG12-BAS1 gene results in delayed senescence of flowers. SAG12-BAS1 transgenic lines, grown in the vegetative state, exhibited a range of phenotypic changes, including dark green leaves, short stature, delayed senescence, increased flower bud counts, branching, reduced internode lengths, and delayed flowering. SAG12-BAS1 transgenic expression increased the activity of protective enzymes, reduced malondialdehyde content, and increased chlorophyll content and soluble sugar accumulation in plants. Expression of senescence genes was increased in the transgenic Petunia hybrida compared to wild-type plants. Conclusions: Our finding suggests that BAS1 could be used as a potential candidate gene regulate plant flower senescence and prolong flower longevity.

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Effect of cycloheximide on some physiological changes associated with senescence of detached flowers of Iris germanica L.

Cited by 7 publications

References 15 publications

Flower Senescence-Strategies and Some Associated Events

Flower Senescence-Strategies and Some Associated Events

UV-B light contributes directly to the synthesis of chiloglottone floral volatiles

Inducing Expression of the BAS1 Gene via the SAG12 Promoter to Delay Flower and Plant Senescence in Transgenic Petunia hybrida

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