Efeito do déficit hí­drico e CO&lt;sub&gt;2&lt;/sub&gt; elevado sobre substâncias fenólicas e ligninas do sorgo var. &amp;#39;BRS 330&amp;#39;

Jara, Carmen Eusebia Palacios

doi:10.11606/t.41.2018.tde-02042018-153833

Cited by 3 publications

(4 citation statements)

References 68 publications

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“…The downregulation of the genes involved in the phenylpropanoid biosynthesis pathway might be responsible for triggering tyrosine accumulation, as shown by the results of our metabolomic analysis (Figure 6). Jara (2017) showed that the phenylpropanoid contents were significantly reduced by E[CO 2 ]/D (to ~6% of the reference amount) when the same samples used to perform the transcriptome analysis of this study were used. This result suggests that the observed repression of genes related to phenylpropanoid biosynthesis could be directly associated with phenylpropanoid depletion (Jara, 2017).…”

Section: Discussionmentioning

confidence: 75%

“…Jara (2017) showed that the phenylpropanoid contents were significantly reduced by E[CO 2 ]/D (to $6% of the reference amount) when the same samples used to perform the transcriptome analysis of this study were used. This result suggests that the observed repression of genes related to phenylpropanoid biosynthesis could be directly associated with phenylpropanoid depletion (Jara, 2017). For instance, the gene encoding cinnamate-4-hydroxylase (Sobic.003G116800; Appendix S1), the first cytochrome P450-dependent monooxygenase of the phenylpropanoid pathway (Bell-Lelong et al, 1997), was downregulated (Appendix S1).…”

Section: Elevated [Co 2 ] Inhibits Specialized Metabolism In Gprs Of ...mentioning

confidence: 97%

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Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

de Souza Rodrigues,

Arge,

de Freitas Guedes

et al. 2023

Physiologia Plantarum

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Elevated [CO2] (E[CO2]) mitigates agricultural losses of C4 plants under drought. Although several studies have described the molecular responses of the C4 plant species Sorghum bicolor during drought exposure, few have reported the combined effects of drought and E[CO2] (E[CO2]/D) on the roots. A previous study showed that, among plant organs, green prop roots (GPRs) under E[CO2]/D presented the second highest increase in biomass after leaves compared with ambient [CO2]/D. GPRs are photosynthetically active and sensitive to drought. To understand which mechanisms are involved in the increase in biomass of GPRs, we performed transcriptome analyses of GPRs under E[CO2]/D. Whole‐transcriptome analysis revealed several pathways altered under E[CO2]/D, among which photosynthesis was strongly affected. We also used previous metabolome data to support our transcriptome data. Activities associated with photosynthesis and central metabolism increased, as seen by the upregulation of photosynthesis‐related genes, a rise in glucose and polyol contents, and increased contents of chlorophyll a and carotenoids. Protein–protein interaction networks revealed that proliferation, biogenesis, and homeostasis categories were enriched and contained mainly upregulated genes. The findings suggest that the previously reported increase in GPR biomass of plants grown under E[CO2]/D is mainly attributed to glucose and polyol accumulation, as well as photosynthesis activity and carbon provided by respiratory CO2 refixation. Our findings reveal that an intriguing and complex metabolic process occurs in GPRs under E[CO2]/D, showing the crucial role of these organs in plant drought /tolerance.

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Section: Discussionmentioning

confidence: 75%

Section: Elevated [Co 2 ] Inhibits Specialized Metabolism In Gprs Of ...mentioning

confidence: 97%

Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

de Souza Rodrigues,

Arge,

de Freitas Guedes

et al. 2023

Physiologia Plantarum

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“…Palacios (2015) quantified whole-plant phenolic compounds using the same samples used to perform the transcriptome analysis of this study. In GPR under WD, phenylpropanoids were significantly decreased in high [CO 2 ], about 6% of the total amount, suggesting that the observed repression of genes related to phenylpropanoid biosynthesis is directly associated with the phenylpropanoids depletion (Jara, 2017). For instance, cinnamate-4-hydroxylase (ID: Sobic.003G116800, Annex I), the first Cytochrome P450-dependent monooxygenase of the phenylpropanoid pathway (Bell-Lelong et al, 1997), is down-regulated and it can be seen in the PPI network analysis (Figure 3B).…”

Section: Discussionmentioning

confidence: 99%

Integrative Analysis ofSorghum BicolorGreen Prop Roots Under Elevated CO₂and Water Deficit Conditions

T¹,

Lwp²,

Guedes³

et al. 2021

Preprint

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Elevated CO2 (E[CO2]) improves the biomass and yield when combined with water-stress in C4 plants. Although several studies described the molecular response of the C4 plant Sorghum bicolor during drought exposure, none reported its combinatorial effect with E[CO2] in the roots. We decided to perform a molecular analysis using green prop roots, the portion of the radicular system photosynthetically active and more sensible to drought. Whole-transcriptome analysis identified 394 up- and 1,471 down-regulated genes. Among the E[CO2] induced pathways, photosynthesis stood out. Carbon fixation, phenylpropanoid, phenolic compounds, and fatty acid biosynthesis-related pathways were repressed. Protein family analysis showed induction of chlorophyll a-b binding protein family, and repression of glutathione-related enzymes. Protein-protein interaction networks exhibited well-defined clusters, including genes related to cell organization and biogenesis, oxi-reduction process, and photosynthesis being induced. The findings suggest that the E[CO2] mitigates the water deficit by antioxidant and osmoregulation activity, as well as by accumulation of sugar-alcohols in the green prop roots, which may be responsible by the increase in biomass together with the cell proliferation. The higher carbon uptake explains the increase in photosynthetic and primary metabolism activities. Our data revealed that green prop roots present an intriguing metabolism under water deficit and E[CO2], showing its crucial role in the drought tolerance acquisition in a predicted future global atmosphere.

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“…C-glycosylated flavones, for example, can act as phytoalexins against fungi and insects (Chen et al, 2013). There is a description of apigenin and tricine helping in severe water deficits and high carbon dioxide environments (Jara, 2017).…”

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confidence: 99%

Chemical constituents and antifungal potential of Attalea geraensis Barb. Rodr. (Arecaceae) palm leaves, a species native to the Cerrado of Brazil

et al. 2023

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Fungal diseases, especially those that affect the root systems of plants, caused by Rhizoctonia and Macrophomina are limiting factors for achieving high crop yields. Alternatives to controlling fungi with chemical products drive the search for new options for bioactive compounds from plants. Attalea geraensis, a palm tree from the Brazilian Cerrado, is rich in flavonoids with antifungal actions. The objective of this work is to identify the chemical classes present in the ethanolic extract of green leaves of A. geraensis and determine the antifungal potential of the extract against isolates of Macrophomina phaseolina (Tassi) Goid. and Rhizoctonia solani JG Kühn. Phytochemical prospection, flavonoid dereplication, and antifungal activity were carried out of the ethanolic extract of the green leaves of A. geraensis harvested in the Cerrado area of Brazil. Steroids, triterpenes, saponins, and anthraquinones are described here for the first time for the leaves of A. geraensis. The flavonoids quercetin, isorhamnetin, 3,7-dimethylquercetin, quercetin 3-galactoside, 5,7-dihydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-{[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-4H-chromen-4-one, rhamnazin 3-galactoside, keioside, and rhamnazin 3-rutinoside were identified. Of these, only quercetin and isorhamnetin had already been identified in the leaves of A. geraensis. The results show a fungistatic potential for the species. The diversity of flavonoids present in the leaves of A. geraensis may be the result of a synergistic action between fungus and plant or there could be an antagonistic effect between flavonoids and the other identified chemical classes.

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Efeito do déficit hídrico e CO<sub>2</sub> elevado sobre substâncias fenólicas e ligninas do sorgo var. 'BRS 330'

Cited by 3 publications

References 68 publications

Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Integrative Analysis ofSorghum BicolorGreen Prop Roots Under Elevated CO₂and Water Deficit Conditions

Chemical constituents and antifungal potential of Attalea geraensis Barb. Rodr. (Arecaceae) palm leaves, a species native to the Cerrado of Brazil

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Efeito do déficit hí­drico e CO<sub>2</sub> elevado sobre substâncias fenólicas e ligninas do sorgo var. &#39;BRS 330&#39;

Cited by 3 publications

References 68 publications

Elevated CO2 increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Elevated CO2 increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Integrative Analysis ofSorghum BicolorGreen Prop Roots Under Elevated CO2and Water Deficit Conditions

Chemical constituents and antifungal potential of Attalea geraensis Barb. Rodr. (Arecaceae) palm leaves, a species native to the Cerrado of Brazil

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Product

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Efeito do déficit hídrico e CO<sub>2</sub> elevado sobre substâncias fenólicas e ligninas do sorgo var. 'BRS 330'

Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Elevated CO₂ increases biomass of Sorghum bicolor green prop roots under drought conditions via soluble sugar accumulation and photosynthetic activity

Integrative Analysis ofSorghum BicolorGreen Prop Roots Under Elevated CO₂and Water Deficit Conditions