Metabolic contribution to salt stress in two maize hybrids with contrasting resistance

Richter, José A.; Erban, Alexander; Kopka, Joachim; Zörb, Christian

doi:10.1016/j.plantsci.2015.01.006

Cited by 92 publications

(71 citation statements)

References 44 publications

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“…It was reported that the intermediate metabolites involved in glycolysis and TCA cycle were reduced under salt stress for both barley and maize [24, 30]. In this study, the metabolites associated with glycolysis were significantly down-regulated in XZ169, being consistent with the previous findings.…”

Section: Discussionsupporting

confidence: 92%

Multi-omics analysis reveals molecular mechanisms of shoot adaption to salt stress in Tibetan wild barley

Shen

Dai

et al. 2016

BMC Genomics

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BackgroundTibetan wild barley (Hordeum spontaneum L.) has been confirmed to contain elite accessions in tolerance to abiotic stresses, including salinity. However, molecular mechanisms underlying genotypic difference of salt tolerance in wild barley are unknown.ResultsIn this study, two Tibetan wild barley accessions (XZ26 and XZ169), differing greatly in salt tolerance, were used to determine changes of ionomic, metabolomic and proteomic profiles in the shoots exposed to salt stress at seedling stage. Compared with XZ169, XZ26 showed better shoot growth and less Na accumulation after 7 days treatments. Salt stress caused significant reduction in concentrations of sucrose and metabolites involved in glycolysis pathway in XZ169, and elevated level of tricarboxylic acid (TCA) cycle, as reflected by up-accumulation of citric acid, aconitic acid and succinic acid, especially under high salinity, but not in XZ26. Correspondingly, proteomic analysis further proved the findings from the metabolomic study.ConclusionXZ26 maintained a lower Na concentration in the shoots and developed superior shoot adaptive strategies to salt stress. The current result provides possible utilization of Tibetan wild barley in developing barley cultivars for salt tolerance.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3242-9) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 92%

Multi-omics analysis reveals molecular mechanisms of shoot adaption to salt stress in Tibetan wild barley

Shen

Dai

et al. 2016

BMC Genomics

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“…The inbred line TL1317 exhibited a high germination rate and survival rate, and the ability to maintain continuous growth in both hydroponic solution with 150 mmol/L NaCl and soil with 250 mmol/L NaCl ( Figure 1 ). These results showed that inbred line TL1317 exhibited better performance than other previously reported maize lines whether grown in a hydroponic solution or soil under salt stress (Qing et al, 2009; Schubert et al, 2009; Richter et al, 2015). Furthermore, we screened out the extremely salt-sensitive maize inbred line SL1303.…”

Section: Discussionsupporting

confidence: 55%

“…However, the world demand for maize, rice, and wheat is projected to increase by 33% in 2050 (FAO). With regard to increasing world food demand and soil salinization, attention should be focused on further understanding plant response to salt stress and improving salt resistance in important crop plants (Flowers, 2004; Richter et al, 2015). …”

Section: Introductionmentioning

confidence: 99%

Ability to Remove Na+ and Retain K+ Correlates with Salt Tolerance in Two Maize Inbred Lines Seedlings

Gao

et al. 2016

Front. Plant Sci.

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Maize is moderately sensitive to salt stress; therefore, soil salinity is a serious threat to its production worldwide. Here, excellent salt-tolerant maize inbred line TL1317 and extremely salt-sensitive maize inbred line SL1303 were screened to understand the maize response to salt stress and its tolerance mechanisms. Relative water content, membrane stability index, stomatal conductance, chlorophyll content, maximum photochemical efficiency, photochemical efficiency, shoot and root fresh/dry weight, and proline and water soluble sugar content analyses were used to identify that the physiological effects of osmotic stress of salt stress were obvious and manifested at about 3 days after salt stress in maize. Moreover, the ion concentration of two maize inbred lines revealed that the salt-tolerant maize inbred line could maintain low Na+ concentration by accumulating Na+ in old leaves and gradually shedding them to exclude excessive Na+. Furthermore, the K+ uptake and retention abilities of roots were important in maintaining K+ homeostasis for salt tolerance in maize. RNA-seq and qPCR results revealed some Na+/H+ antiporter genes and Ca2+ transport genes were up-regulated faster and higher in TL1317 than those in SL1303. Some K+ transport genes were down-regulated in SL1303 but up-regulated in TL1317. RNA-seq results, along with the phenotype and physiological results, suggested that the salt-tolerant maize inbred line TL1317 possesses more rapidly and effectively responses to remove toxic Na+ ions and maintain K+ under salt stress than the salt-sensitive maize inbred line SL1303. This response should facilitate cell homoeostasis under salt stress and result in salt tolerance in TL1317.

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“…Such a variable response of respiration has been previously observed, i.e. in Nothofagus species with different drought tolerance (Sanhueza et al ., ) and can be because of the different metabolic adaptations that have been observed between sensitive and tolerant closely related species (Sanchez et al , ; Jacoby et al, ), cultivars (Widodo et al , ) or hybrids (Richter et al, ).…”

Section: Introductionmentioning

confidence: 99%

Salinity tolerance is related to cyanide‐resistant alternative respiration in Medicago truncatula under sudden severe stress

Del‐Saz

Florez‐Sarasa

Clemente‐Moreno

et al. 2016

Plant Cell & Environment

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Salt respiration is defined as the increase of respiration under early salt stress. However, the response of respiration varies depending on the degree of salt tolerance and salt stress. It has been hypothesized that the activity of the alternative pathway may increase preventing over-reduction of the ubiquinone pool in response to salinity, which in turn can increase respiration. Three genotypes of Medicago truncatula are reputed as differently responsive to salinity: TN1.11, A17 and TN6.18. We used the oxygen-isotope fractionation technique to study the in vivo respiratory activities of the cytochrome oxidase pathway (COP) and the alternative oxidase pathway (AOP) in leaves and roots of these genotypes treated with severe salt stress (300 mM) during 1 and 3 days. In parallel, AOX capacity, gas exchange measurements, relative water content and metabolomics were determined in control and treated plants. Our study shows for first time that salt respiration is induced by the triggered AOP in response to salinity. Moreover, this phenomenon coincides with increased levels of metabolites such as amino and organic acids, and is shown to be related with higher photosynthetic rate and water content in TN6.18.

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Metabolic contribution to salt stress in two maize hybrids with contrasting resistance

Cited by 92 publications

References 44 publications

Multi-omics analysis reveals molecular mechanisms of shoot adaption to salt stress in Tibetan wild barley

Multi-omics analysis reveals molecular mechanisms of shoot adaption to salt stress in Tibetan wild barley

Ability to Remove Na+ and Retain K+ Correlates with Salt Tolerance in Two Maize Inbred Lines Seedlings

Salinity tolerance is related to cyanide‐resistant alternative respiration in Medicago truncatula under sudden severe stress

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