Changes in free polyamines and gene expression during peach flower development

Liu, J. H.; Moriguchi, Takaya

doi:10.1007/s10535-007-0114-9

Cited by 14 publications

(13 citation statements)

References 24 publications

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“…Except odc, the remaining genes were more highly induced in nodules colonized by the HSS− strain where intriguingly, no accumulation of Spd Mean values followed by the same letter do not differ (P ≤ 0.05) using an LSD test and Spm was detected. Inconsistency between gene expression and PA content has been reported in several studies (Alcázar et al 2006;Hummel et al 2004;Liu and Moriguchi 2007) and should be related to the existence of post-transcriptional and/or translational regulation mechanisms for SPDS and/or S-adenosylmethionine decarboxylase activities in which Homspd and/or 4-Abcad could be involved. The functioning of the nodule metabolism was assessed by the determination of the NFR and the nodule biomass (Fig.…”

Section: Discussionmentioning

confidence: 74%

Homospermidine synthase contributes to salt tolerance in free-living Rhizobium tropici and in symbiosis with Phaseolus vulgaris

et al. 2016

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Background and aims Homospermidine is known to be the most abundant polyamine in root nodules of Phaseolus vulgaris induced by Rhizobium tropici. In addition, homospermidine is involved in the stress tolerance of fast-growing rhizobia and in the bacteroid protection from environmental changes. For that reason, in this work, we have investigated the role of the rhizobial homospermidine synthase in the response of P. vulgaris root nodules to salinity. Materials and methods A mutant strain of R. tropici impaired in the synthesis of homospermidine has been constructed (Rt hss::Ω, Sp r ) and the response to salinity of the free-living and symbiotic bacteria has been analyzed. Plants of P. vulgaris inoculated with the mutant strain were treated with 100 mM NaCl, and the concentration of polyamines was determined in different nodular fractions together with nitrogen fixation and gene expression of polyamine biosynthetic enzymes.Results Neither homospermidine nor 4-aminobutilcadaverine was detected in the free-living mutant bacteria and in nodules of plants inoculated with Rt hss::Ω, Sp r . This strain was more sensitive to salinity than the wild type, and plants inoculated with the mutant bacteria had lower nodule fresh weight than with the wild type. Conclusion Homospermidine synthase contributes to salt stress in both free-living and symbiotic bacteria. Despite the synthesis of homospermidine, this enzyme produces also 4-aminobutilcadaverine. Based on the lower nodule fresh weight and plant biomass reduction induced by salinity in plants inoculated with the mutant strain, this enzyme seems to be involved in nodule organogenesis and salt tolerance.

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Section: Discussionmentioning

confidence: 74%

Homospermidine synthase contributes to salt tolerance in free-living Rhizobium tropici and in symbiosis with Phaseolus vulgaris

et al. 2016

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“…Upregulation of MADS and FLC in TG9 suggests that overexpression of MdSPDS1 has led to alteration of gene network associated with flowering in the transgenic plant. Although it will need time to compare the flowering dynamics between the transgenic line and WT, the polyamines have been shown to participate in the physiological process of flowering in plants [52, 53]. …”

Section: Discussionmentioning

confidence: 99%

Transcriptional Profiling of Canker-Resistant Transgenic Sweet Orange (Citrus sinensisOsbeck) Constitutively Overexpressing a Spermidine Synthase Gene

Liu

2013

BioMed Research International

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Citrus canker disease caused by Xanthomonas citri subsp. citri (Xcc) is one of the most devastating diseases affecting the citrus industry worldwide. In our previous study, the canker-resistant transgenic sweet orange (Citrus sinensis Osbeck) plants were produced via constitutively overexpressing a spermidine synthase. To unravel the molecular mechanisms underlying Xcc resistance of the transgenic plants, in the present study global transcriptional profiling was compared between untransformed line (WT) and the transgenic line (TG9) by hybridizing with Affymetrix Citrus GeneChip. In total, 666 differentially expressed genes (DEGs) were identified, 448 upregulated, and 218 downregulated. The DEGs were classified into 33 categories after Gene ontology (GO) annotation, in which 68 genes are in response to stimulus and involved in immune system process, 12 genes are related to cell wall, and 13 genes belong to transcription factors. These genes and those related to starch and sucrose metabolism, glutathione metabolism, biosynthesis of phenylpropanoids, and plant hormones were hypothesized to play major roles in the canker resistance of TG9. Semiquantitative RT-PCR analysis showed that the transcript levels of several candidate genes in TG9 were significantly higher than in WT both before and after Xcc inoculation, indicating their potential association with canker disease.

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“…More than 70 genes are involved in the flowering process in different plant species, which span perception of environmental stimuli, morphological changes in meristem tissues, transportation of carbohydrates, and other functions [107]. A series of proteins and hormones, as well as their transportation, are also involved in this process [65,66,82,85], as well as a series of free polyamines that express themselves during floral development in peach [108].…”

Section: Genetic Controlmentioning

confidence: 99%

“…This has been also described in peach, reporting an intensive production of mRNA in the apical meristem at the onset of flower initiation. [52,108].…”

Section: Genetic Controlmentioning

confidence: 99%

Development of Peach Flower Buds under Low Winter Chilling Conditions

et al. 2020

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Here, we reviewed both endogenous and exogenous factors involved in the processes of flower bud formation and flower development in peach, analyzing how they can be affected by climatic change in temperate zones, explored the expansion of peach to tropical or subtropical zones. The process of flower bud formation in peach differs between low winter chilling and temperate conditions. Although the main steps of flower development are maintained, the timing in which each one occurs is different, and some processes can be altered under low winter chilling conditions, with a great impact on fruit production and crop management. Further studies on flower bud induction and differentiation under warmer conditions are fundamental for addressing the alterations in flower bud development that negatively impact on next season’s harvest. In the future, horticulturalists and scientists will face several challenges, mainly how high temperatures affect the expression of the main genes regulating flower formation and how to improve crop management in these conditions.

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Changes in free polyamines and gene expression during peach flower development

Cited by 14 publications

References 24 publications

Homospermidine synthase contributes to salt tolerance in free-living Rhizobium tropici and in symbiosis with Phaseolus vulgaris

Homospermidine synthase contributes to salt tolerance in free-living Rhizobium tropici and in symbiosis with Phaseolus vulgaris

Transcriptional Profiling of Canker-Resistant Transgenic Sweet Orange (Citrus sinensisOsbeck) Constitutively Overexpressing a Spermidine Synthase Gene

Development of Peach Flower Buds under Low Winter Chilling Conditions

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