Regulation of invertase activity in different root zones of wheat (Triticum aestivum L.) seedlings in the course of osmotic adjustment under water deficit conditions

Königshofer, Helga; Löppert, H. G.

doi:10.1016/j.jplph.2015.06.005

Cited by 29 publications

(17 citation statements)

References 47 publications

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“…The prolonged drought caused M. macclurei (more than 6 times the TC, Figure 3C ) and S. superba (∼2 times the TC, Figure 3G ) to significantly accumulate leaf proline. The result implied that both M. macclurei and S. superba could actively adjust proline in leaves in response to extended drought, which may be an adaptive strategy to protect it against drought stress and increase drought stress tolerance (Cvikrová, 2013; Königshofer and Löppert, 2015). …”

Section: Discussionmentioning

confidence: 99%

Dominant Trees in a Subtropical Forest Respond to Drought Mainly via Adjusting Tissue Soluble Sugar and Proline Content

Kuang

Zhang

et al. 2017

Front. Plant Sci.

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It is well-known that drought has considerable effects on plant traits from leaf to ecosystem scales; however, little is known about the relative contributions of various traits within or between tree species in determining the plant’s sensitivity or the tolerance to drought under field conditions. We conducted a field throughfall exclusion experiment to simulate short-term drought (∼67% throughfall exclusion during the dry season from October to March) and prolonged drought (∼67% throughfall exclusion prolonging the dry season from October to May) and to understand the effects of drought on two dominant tree species (Michelia macclurei and Schima superba) in subtropical forests of southern China. The morphological, physiological, and nutritional responses of the two species to the two types of drought were determined. There were significantly different morphological (leaf max length, max width, leaf mass per area), physiological (leaf proline) and nutritional (P, S, N, K, Ca, Mg) responses by M. macclurei and S. superba to prolonged drought. Comparison between the drought treatments for each species indicated that the trees responded species–specifically to the short-term and prolonged drought, with S. superba exhibiting larger plasticity and higher adaption than M. macclurei. M. macclurei responded more sensitively to prolonged drought in terms of morphology, proline content, and nutritional traits and to short-term drought with regard to soluble sugars content. The differential species-specific responses to drought will allow us to estimate the changes in dominant trees in subtropical forests of China that have experienced a decade’s worth of annual seasonal drought.

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Section: Discussionmentioning

confidence: 99%

Dominant Trees in a Subtropical Forest Respond to Drought Mainly via Adjusting Tissue Soluble Sugar and Proline Content

Kuang

Zhang

et al. 2017

Front. Plant Sci.

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“…Fructans are degraded into sucrose and fructose by linkage-specific fructan exohydrolases, for example, 1-FEH, 6-FEH, and 6&1-FEH ( Van den Ende et al, 2003 ; Kawakami et al, 2005 ; Van Riet et al, 2006 , 2008 ; Xue et al, 2008 ). Sucrose is hydrolyzed to Hex through different types of invertases (INVs), among which soluble acid-type vacuolar invertase is the most prominent form in wheat roots ( Königshofer and Löppert, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Contributions of Root WSC during Grain Filling in Wheat under Drought

Zhang

Dell

et al. 2016

Front. Plant Sci.

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As the first organ in plants to sense water-deficit in the soil, roots have important roles for improving crop adaption to water limited environments. Stem water soluble carbohydrates (WSC) are a major carbon source for grain filling under drought conditions. The contributions of root WSC during grain filling under drought has not been revealed. Wheat parental lines of Westonia, Kauz and their derived four double haploid (DH) lines, namely, DH 125, DH 139, DH 307, and DH 338 were used in a field drought experiment with four replications. Through measurements of the root and stem WSC components, and the associated enzyme activities during grain filling, we identified that the levels of root WSC and fructan were one third of the levels in stems. In particular, root glucose and 6-kestose levels were one third of the stem, while the root fructose and bifurcose level were almost half of the stem and sucrose level was two third of the stem. The accumulation and the degradation patterns of root fructan levels were similar to that in the stem, especially under drought. Correlations between root fructan levels and grain assimilation were highly significant, indicating that under terminal drought, root WSC represents a redistributed carbon source for grain filling rather than deep rooting. The significantly higher root sucrose levels under drought suggest that sucrose may act as a signal under drought stress. As compared with stem fructose levels, the earlier increased root fructose levels in DH 307, DH 139, and DH 338 provided agile response to drought stress. Our root results further confirmed that β-(2–6) linkages predominate in wheat with patterns of 6-kestose being closely correlated with overall fructan patterns. Further research will focus on the roles of 6-FEH during fructan remobilization in stems.

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“…The starch and sucrose metabolic process is widely identified in many plants under drought stress (Min et al, 2016;Ma et al, 2017;Khan et al, 2019;Hong et al, 2020). Trehalose, glucose, and sucrose are important soluble sugars to maintain cell osmotic potential (Konigshofer and Loppert, 2015;Han et al, 2016;Cui et al, 2019). Based on the analysis of soluble sugar content in the present study (Figure 1E), we hypothesized that these DEGs were involved in the biosynthesis of trehalose, glucose, and sucrose to maintain cell osmotic potential under severe drought stress.…”

Section: Analysis Of Starch and Sucrose Metabolism In Response To Drought Stressmentioning

confidence: 63%

Transcriptome and Co-expression Network Analyses Reveal Differential Gene Expression and Pathways in Response to Severe Drought Stress in Peanut (Arachis hypogaea L.)

Zhao

Cui

et al. 2021

Front. Genet.

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Drought is one of the major abiotic stress factors limiting peanut production. It causes the loss of pod yield during the pod formation stage. Here, one previously identified drought-tolerant cultivar, “L422” of peanut, was stressed by drought (35 ± 5%) at pod formation stage for 5, 7, and 9 days. To analyze the drought effects on peanut, we conducted physiological and transcriptome analysis in leaves under well-watered (CK1, CK2, and CK3) and drought-stress conditions (T1, T2, and T3). By transcriptome analysis, 3,586, 6,730, and 8,054 differentially expressed genes (DEGs) were identified in “L422” at 5 days (CK1 vs T1), 7 days (CK2 vs T2), and 9 days (CK3 vs T3) of drought stress, respectively, and 2,846 genes were common DEGs among the three-time points. Furthermore, the result of weighted gene co-expression network analysis (WGCNA) revealed one significant module that was closely correlated between drought stress and physiological data. A total of 1,313 significantly up-/down-regulated genes, including 61 transcription factors, were identified in the module at three-time points throughout the drought stress stage. Additionally, six vital metabolic pathways, namely, “MAPK signaling pathway-plant,” “flavonoid biosynthesis,” “starch and sucrose metabolism,” “phenylpropanoid biosynthesis,” “glutathione metabolism,” and “plant hormone signal transduction” were enriched in “L422” under severe drought stress. Nine genes responding to drought tolerance were selected for quantitative real-time PCR (qRT-PCR) verification and the results agreed with transcriptional profile data, which reveals the reliability and accuracy of transcriptome data. Taken together, these findings could lead to a better understanding of drought tolerance and facilitate the breeding of drought-resistant peanut cultivars.

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Regulation of invertase activity in different root zones of wheat (Triticum aestivum L.) seedlings in the course of osmotic adjustment under water deficit conditions

Cited by 29 publications

References 47 publications

Dominant Trees in a Subtropical Forest Respond to Drought Mainly via Adjusting Tissue Soluble Sugar and Proline Content

Dominant Trees in a Subtropical Forest Respond to Drought Mainly via Adjusting Tissue Soluble Sugar and Proline Content

Contributions of Root WSC during Grain Filling in Wheat under Drought

Transcriptome and Co-expression Network Analyses Reveal Differential Gene Expression and Pathways in Response to Severe Drought Stress in Peanut (Arachis hypogaea L.)

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