Polyamines: potent modulators of plant responses to stress

Fariduddin, Qazi; Varshney, Priyanka; Yusuf, Mohammad; Ahmad, Aftab

doi:10.1080/17429145.2012.716455

Cited by 89 publications

(53 citation statements)

References 135 publications

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“…Several reviews [6,[9][10] have dealt with the relationship between tolerance and the capacity to enhance the synthesis of polyamines upon exposure to stress. Plants overexpressing genes encoding enzymes involved in polyamine biosynthesis accumulate higher levels of polyamines and show enhanced tolerance to various stresses [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Speculation: Polyamines are important in abiotic stress signaling

2015

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The main role of polyamines was originally assumed to be as direct protective compounds important under stress conditions. Although in some cases a correlation was found between the endogenous polyamine content and stress tolerance, this relationship cannot be generalized. Polyamines should no longer be considered simply as protective molecules, but rather as compounds that are involved in a complex signaling system and have a key role in the regulation of stress tolerance. The major links in polyamine signaling may be H 2 O 2 and NO, which are not only produced in the course of the polyamine metabolism, but also transmit signals that influence gene expression via an increase in the cytoplasmic Ca 2+ level.Polyamines can also influence Ca 2+ influx independently of the H 2 O 2 -and/or NO-mediated pathways. Furthermore, these pathways may converge. In addition, several protein kinases have been shown to be influenced at the transcriptional or post-translational level by polyamines. Individual polyamines can be converted into each other in the polyamine cycle.In addition, their metabolism is linked with other hormones or signaling molecules. However, as individual polyamines trigger different transcriptional responses, other mechanisms and the existence of polyamine-responsive elements and the corresponding transacting protein factors are also involved in polyamine-related signaling pathways. Highlights:-Polyamines are interconvertible in the polyamine cycle -The statement "the higher the polyamine level the better" cannot be generalized -In stress responses the ratio of signaling to direct protection is more important -Polyamines are also involved in hormonal cross-talk -H 2 O 2 and NO are the major but not the only links in polyamine stress signaling

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Section: Introductionmentioning

confidence: 99%

“…Plants overexpressing genes encoding enzymes involved in polyamine biosynthesis accumulate higher levels of polyamines and show enhanced tolerance to various stresses [9][10][11][12][13][14]. This suggests that an increase in polyamine synthesis is effective against all types of stress.…”

Section: Introductionmentioning

confidence: 99%

Speculation: Polyamines are important in abiotic stress signaling

2015

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“…Now, in response to oxidative stress, a number of elicitor moieties have been recognized for their efficacy to moderate the generated ROS. Among the elicitors, polyamine is one of the integral component that involved in alleviation of various abiotic stresses like salinity, drought, chilling, oxidative stress, metal toxicity, and paraquat (Fariduddin et al 2013). This study also showed that putrescine (Put), a di-amine, which is a straight chain aliphatic compound (Farooq et al 2009), diversed the cellular responses like osmotic adjustment, membrane functioning, modulation of metabolic pathways, and gene activation for detoxifications of ROS as reported in plant system (Ding et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of putrescine on oxidative stress induced by hydrogen peroxide in Salvinia natans L.

Mandal

Ghosh

Dey

et al. 2014

Journal of Plant Interactions

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Salvinia natans L. response to hydrogen peroxide (H 2 O 2 ) induced oxidative stress through physiological activities was evaluated. The plants were incubated with varying concentrations (0, 50, 100 µM) of H 2 O 2 and 100 µM of H 2 O 2 supplemented with 1 mM putrescine (Put) in hydroponic culture. This is observed with the decline in proline content and its biosynthetic enzymes viz. γ-glutamyl kinase and γ-glutamyl phosphate reductase activity. Protein carbamylated derivative by protein oxidation was another trait for oxidative damages by H 2 O 2 . The antioxidative enzymes like guaiacol peroxidase (GPX), glutathione reductase (GR), and catalase (CAT) recorded to express through in-gel staining with the H 2 O 2 exposure. On nuclear level, plants were sensitive to H 2 O 2 where the DNA disintegration was studied with comet assay and maximum comet tail observed at 100 µM H 2 O 2 treatment. Application of Put reduced the generation of protein oxidation and comet tail length as well as moderated the enzyme activity as revealed through in-gel staining.

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“…ODC carries out the reaction of ornithine decarboxylation directly to Put (Fariduddin et al, 2013). The biosynthesis of Put is also preceded by reactions of Arg decarboxylation by ADC to Agm (Lightfoot and Hall, 2014).…”

Section: Figure 8 Suggested Biogenic Amines Biosynthesis In Plantsmentioning

confidence: 99%

Role of decarboxylases in the biosynthesis of biogenic amines of pea growing in soil contaminated with lomefloxacin

Baciak¹

2017

Appl Ecol Env Res

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Abstract.Lomefloxacin is an antibiotic used in human and animal medicine that is excreted to the environment, where it is taken up by plants. In the present study, we identified a new, universal parameter of lomefloxacin's toxicity to pea. We showed that activity of arginine decarboxylase and putrescine, which is synthetised in this pathway is a very good toxicity parameter, as confirmed by the calculated EC indices. The lomefloxacin toxicity resulted in a complete inactivation of ornithine decarboxylase and increase of activities of arginine decarboxylase, and S-adenosylmethionine decarboxylase. We propose that putrescine is not synthesised directly from ornithine. Instead, we suggest that the biosynthesis pathway proceeds from arginine to agmatine and is catalysed by arginine decarboxylase, which is followed by the formation of N-carbamoylputrescine with the participation of agmatine imniohydrolase. N-carbamoylputrescine amidohydrolase is involved in the synthesis of putrescine with Ncarbamoylputrescine. The activity of S-adenosylmethionine decarboxylase in the roots and stems increased almost 5-fold, arginine decarboxylase in the roots increased up to 18-fold, while in the stems it increased 6-fold, and ornithine decarboxylase in the roots and stems increased 3.5-fold. The highest biogenic amines content was found in seedlings growing in soil contaminated with 50 mg×kg -1 of soil lomefloxacin. We also recommend quantifying the activity of decarboxylases by measuring the secreted CO 2 volume with a multi-gas analyser equipped with an infrared detector. It is a simple, reliable, and cheap technique. Keywords: morphological parameters of plants, decarboxylases activity, toxicity, infrared detectorAbbreviations: Lomefloxacin -LOM; Effect concentration for the inhibition of growth rate at the level of x % (x = 10,

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Polyamines: potent modulators of plant responses to stress

Cited by 89 publications

References 135 publications

Speculation: Polyamines are important in abiotic stress signaling

Speculation: Polyamines are important in abiotic stress signaling

Effects of putrescine on oxidative stress induced by hydrogen peroxide in Salvinia natans L.

Role of decarboxylases in the biosynthesis of biogenic amines of pea growing in soil contaminated with lomefloxacin

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