Molecular phylogenomic study and the role of exogenous spermidine in the metabolic adjustment of endogenous polyamine in two rice cultivars under salt stress

Saha, Jayita; Giri, Kalyan

doi:10.1016/j.gene.2017.02.001

Cited by 22 publications

(11 citation statements)

References 70 publications

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“…Membranes integrity was affected by the presence of such elevated salinity; nevertheless priming treatments alleviated the symptoms, especially when SPD, SPM and NaCl were used as chemical agents. These results, in agreement with the literature, suggest a role for PAs in stabilizing cell membranes during salt stress [26].…”

Section: Discussionsupporting

confidence: 93%

Enhancement of Brassica napus Tolerance to High Saline Conditions by Seed Priming

Stassinos

Rossi

Borromeo

et al. 2021

Plants

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Plants grown in saline soils undergo osmotic and oxidative stresses, affecting growth and photosynthesis and, consequently, the yield. Therefore, the increase in soil salinity is a major threat to crop productivity worldwide. Plant’s tolerance can be ameliorated by applying simple methods that induce them to adopt morphological and physiological adjustments to counteract stress. In this work, we evaluated the effects of seed priming on salt stress response in three cultivars of rapeseed (Brassica napus L.) that had different tolerance levels. Seed chemical priming was performed with 2.5 mM spermine (SPM), 5 mM spermidine (SPD), 40 mM NaCl and 2.5 mM Ca (NO3)2. Primed and not primed seeds were sown on saline and not saline (controls) media, and morphological and physiological parameters were determined. Since SPD treatment was effective in reducing salinity negative effects on growth, membrane integrity and photosynthetic pigments, we selected this priming to further investigate plant salt stress response. The positive effects of this seed treatment on growth and physiological responses were evident when primed plants were compared to not primed ones, grown under the same saline conditions. SPD priming ameliorated the tolerance towards saline stress, in a genotype-independent manner, by increasing photosynthetic pigments, proline amounts and antioxidant responses in all cultivars exposed to salt. These results may open new perspectives for crop productivity in the struggle against soil salinization.

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Section: Discussionsupporting

confidence: 93%

Enhancement of Brassica napus Tolerance to High Saline Conditions by Seed Priming

Stassinos

Rossi

Borromeo

et al. 2021

Plants

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“…Polyamines not only increase the resistance of plants to salt stress [ 7 ], water stress [ 8 ], and mineral nutrient deficit [ 9 ], they also increase the plant’s ability to resist high temperatures [ 10 ]. Exogenous spermidine treatment can significantly change the content of endogenous polyamines [ 11 ] and effectively alleviate the inhibition of the growth of cucumber plants under high-temperature stress. High-temperature stress can cause significant changes in the expression of some proteins.…”

Section: Introductionmentioning

confidence: 99%

Identification of microRNAs associated with the exogenous spermidine-mediated improvement of high-temperature tolerance in cucumber seedlings (Cucumis sativus L.)

et al. 2018

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BackgroundHigh-temperature stress inhibited the growth of cucumber seedlings. Foliar spraying of 1.0 mmol·L− 1 exogenous spermidine (Spd) to the sensitive cucumber cultivar ‘Jinchun No. 2’ grown at high-temperature (42 °C/32 °C) in an artificial climate box improved the high-temperature tolerance. Although there have been many reports on the response of microRNAs (miRNAs) to high-temperature stress, the mechanism by which exogenous Spd may mitigate the damage of high-temperature stress through miRNA-mediated regulation has not been studied.ResultsTo elucidate the regulation of miRNAs in response to exogenous Spd-mediated improvement of high-temperature tolerance, four small RNA libraries were constructed from cucumber leaves and sequenced: untreated-control (CW), Spd-treated (CS), high-temperature stress (HW), and Spd-treated and high-temperature stress (HS). As a result, 107 known miRNAs and 79 novel miRNAs were identified. Eight common differentially expressed miRNAs (miR156d-3p, miR170-5p, miR2275-5p, miR394a, miR479b, miR5077, miR5222 and miR6475) were observed in CS/CW, HW/CW, HS/CW and HS/HW comparison pairs, which were the first set of miRNAs that responded to not only high-temperature stress but also exogenous Spd in cucumber seedlings. Five of the eight miRNAs were predicted to target 107 potential genes. Gene function and pathway analyses highlighted the integral role that these miRNAs and target genes probably play in the improvement of the high-temperature tolerance of cucumber seedlings through exogenous Spd application.ConclusionsOur study identified the first set of miRNAs associated with the exogenous Spd-mediated improvement of high-temperature tolerance in cucumber seedlings. The results could help to promote further studies on the complex molecular mechanisms underlying high-temperature tolerance in cucumber and provide a theoretical basis for the high-quality and efficient cultivation of cucumber with high-temperature resistance.Electronic supplementary materialThe online version of this article (10.1186/s12864-018-4678-x) contains supplementary material, which is available to authorized users.

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“…Exogenous Spm was proved to induce defense response and increase resistance to root rot pathogen Phytophthora capsici in Capsicum annuum plants [ 21 ]. Furthermore, a study in Oryza sativa L. demonstrated that Spd is vital for the adjustment of intracellular PA pathways and endogenous PA homeostasis that promotes salt tolerance [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Exogenous Melatonin Alleviates Alkaline Stress in Malus hupehensis Rehd. by Regulating the Biosynthesis of Polyamines

et al. 2017

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Since melatonin was identified in plants decades ago, much attention has been devoted to discovering its role in plant science. There is still a great deal to learn about the functional importance of melatonin, as well as its functional mode. In this paper, we examine the role of melatonin treatment in the response of Malus hupehensis Rehd. to alkaline conditions. Stressed seedlings showed chlorosis and suppressed growth. However, this phenotype was ameliorated when 5 µM melatonin was added to the irrigation solution. This supplementation was also associated with a reduction in cell membrane damage and maintenance of a normal root system architecture. Fewer reactive oxygen species (ROS) were accumulated due to the enhanced scavenging activity of antioxidant enzymes superoxide dismutase, peroxidase, and catalase. In addition, alkaline-stressed seedlings that received the melatonin supplement accumulated more polyamines compared with untreated seedlings. Transcript levels of six genes involved in polyamine synthesis, including SAMDC1, -3, and -4, and SPDS1, -3, and -5, -6, were upregulated in response to melatonin application. All of these results demonstrate that melatonin has a positive function in plant tolerance to alkaline stress because it regulates enzyme activity and the biosynthesis of polyamines.

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Molecular phylogenomic study and the role of exogenous spermidine in the metabolic adjustment of endogenous polyamine in two rice cultivars under salt stress

Cited by 22 publications

References 70 publications

Enhancement of Brassica napus Tolerance to High Saline Conditions by Seed Priming

Enhancement of Brassica napus Tolerance to High Saline Conditions by Seed Priming

Identification of microRNAs associated with the exogenous spermidine-mediated improvement of high-temperature tolerance in cucumber seedlings (Cucumis sativus L.)

Exogenous Melatonin Alleviates Alkaline Stress in Malus hupehensis Rehd. by Regulating the Biosynthesis of Polyamines

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