Carbon-nitrogen metabolism and oxidative stress in young plants of Dipteryx alata Vog. subjected to seasonal water regimes in the Cerrado

Vieira, Evandro Alves; Silva, Maria das Graças; Gomes, Alessandra dos Santos; Urakawa, Alessandra Harumi; Barros, Ana Cristina

doi:10.1016/j.envexpbot.2020.104361

Cited by 10 publications

(3 citation statements)

References 45 publications

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“…Similarly, the increase in alanine, asparagine, glutamine, and serine alleviated salt stress through osmotic adjustment in JD19 and LH3 ( Figure 7 A). Moreover, some amino acids, such as leucine, isoleucine, lysine, valine, and threonine, produce energy through catabolism to cope with environmental stresses [ 47 ]. Lysine, valine, leucine, and isoleucine degradation pathways have been identified as the key factors for drought tolerance in Arabidopsis [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Integrated Physiological, Transcriptomic, and Metabolomic Analyses Revealed Molecular Mechanism for Salt Resistance in Soybean Roots

Jin

Wang

et al. 2021

IJMS

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Salinity stress is a threat to yield in many crops, including soybean (Glycine max L.). In this study, three soybean cultivars (JD19, LH3, and LD2) with different salt resistance were used to analyze salt tolerance mechanisms using physiology, transcriptomic, metabolomic, and bioinformatic methods. Physiological studies showed that salt-tolerant cultivars JD19 and LH3 had less root growth inhibition, higher antioxidant enzyme activities, lower ROS accumulation, and lower Na+ and Cl- contents than salt-susceptible cultivar LD2 under 100 mM NaCl treatment. Comparative transcriptome analysis showed that compared with LD2, salt stress increased the expression of antioxidant metabolism, stress response metabolism, glycine, serine and threonine metabolism, auxin response protein, transcription, and translation-related genes in JD19 and LH3. The comparison of metabolite profiles indicated that amino acid metabolism and the TCA cycle were important metabolic pathways of soybean in response to salt stress. In the further validation analysis of the above two pathways, it was found that compared with LD2, JD19, and LH3 had higher nitrogen absorption and assimilation rate, more amino acid accumulation, and faster TCA cycle activity under salt stress, which helped them better adapt to salt stress. Taken together, this study provides valuable information for better understanding the molecular mechanism underlying salt tolerance of soybean and also proposes new ideas and methods for cultivating stress-tolerant soybean.

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Section: Discussionmentioning

confidence: 99%

Integrated Physiological, Transcriptomic, and Metabolomic Analyses Revealed Molecular Mechanism for Salt Resistance in Soybean Roots

Jin

Wang

et al. 2021

IJMS

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“…The increase in glutamate, proline, tryptophan, phenylalanine and valine in desiccated leaves of B. graminifolia could be due to protein degradation. This process results in a pool of free amino acids that could act as reserves of nitrogenous compounds and can be reincorporated into proteins for early recovery (Vieira et al, 2021). Stress‐induced protein hydrolysis increases free lysine levels, which could induce the aspartate pathway (Pratelli & Pilot, 2014).…”

Section: Discussionmentioning

confidence: 99%

Water retention and metabolic changes improve desiccation tolerance in Barbacenia graminifolia (Velloziaceae)

Vieira

Silva

Rossi

et al. 2022

Physiologia Plantarum

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Barbacenia graminifolia is a Velloziaceae species endemic to the campos rupestres in Serra do Cip o, Minas Gerais state (Brazil). This biome is characterised by high irradiance and limited water conditions. Unlike other resurrection plants, B. graminifolia can maintain a high hydric status (>80%) after 28 days of water suppression before desiccation. We investigated the physiological and metabolic mechanisms associated with structural changes that allow B. graminifolia to maintain hydration under a prolonged water deficit and to recover after desiccation. After 30 days of water deficit, desiccated plants exhibited chlorophyll degradation, a 178.4% and 193.7% increase in total carotenoids and MDA, respectively, and twice the CAT and APX activity compared to hydrated plants. The metabolite profile showed increased amino acids, carbohydrates, saturated fatty acids and benzoic acids during dehydration, while trichloroacetic acid cycle acids were higher in hydrated and rehydrated plants. Anatomical and ultrastructural data corroborated the physiological and metabolic changes and revealed the presence of mucilaginous cells with high water retention capacity. Our data indicated that combined strategies of assimilatory metabolism

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“…This is crucial as desiccation-induced imbalances in the carbon assimilation led to an increased production of reactive oxygen species (ROS) ( Beckett et al., 2012 ; Tan et al., 2017 ). Elevated enzymatic antioxidant defenses and the accumulation of protective metabolites, such as ascorbate (vitamin C), tocopherols and tocotrienols (vitamin E), carotenoids, and oxidized and reduced glutathione, are identified as primary mechanisms for ROS scavenging in plants and green algae facing water scarcity ( Pintó-Marijuan and Munné-Bosch, 2013 ; Griffiths et al., 2014 ; Vieira et al., 2017a ; Radermacher et al., 2019 ; Moura and Vieira, 2020 ; Vieira et al., 2021 ; Roach et al., 2022a ; Roach et al., 2022b ).…”

Section: Introductionmentioning

confidence: 99%

Desiccation tolerance in the resurrection plant Barbacenia graminifolia involves changes in redox metabolism and carotenoid oxidation

Vieira,

Gaspar,

Caldeira

et al. 2024

Front. Plant Sci.

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Desiccation tolerance in vegetative tissues enables resurrection plants to remain quiescent under severe drought and rapidly recover full metabolism once water becomes available. Barbacenia graminifolia is a resurrection plant that occurs at high altitudes, typically growing on rock slits, exposed to high irradiance and limited water availability. We analyzed the levels of reactive oxygen species (ROS) and antioxidants, carotenoids and its cleavage products, and stress-related phytohormones in fully hydrated, dehydrated, and rehydrated leaves of B. graminifolia. This species exhibited a precise adjustment of its antioxidant metabolism to desiccation. Our results indicate that this adjustment is associated with enhanced carotenoid and apocarotenoids, α-tocopherol and compounds of ascorbate-glutathione cycle. While α-carotene and lutein increased in dried-leaves suggesting effective protection of the light-harvesting complexes, the decrease in β-carotene was accompanied of 10.2-fold increase in the content of β-cyclocitral, an apocarotenoid implicated in the regulation of abiotic stresses, compared to hydrated plants. The principal component analysis showed that dehydrated plants at 30 days formed a separate cluster from both hydrated and dehydrated plants for up to 15 days. This regulation might be part of the protective metabolic strategies employed by this resurrection plant to survive water scarcity in its inhospitable habitat.

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Carbon-nitrogen metabolism and oxidative stress in young plants of Dipteryx alata Vog. subjected to seasonal water regimes in the Cerrado

Cited by 10 publications

References 45 publications

Integrated Physiological, Transcriptomic, and Metabolomic Analyses Revealed Molecular Mechanism for Salt Resistance in Soybean Roots

Integrated Physiological, Transcriptomic, and Metabolomic Analyses Revealed Molecular Mechanism for Salt Resistance in Soybean Roots

Water retention and metabolic changes improve desiccation tolerance in Barbacenia graminifolia (Velloziaceae)

Desiccation tolerance in the resurrection plant Barbacenia graminifolia involves changes in redox metabolism and carotenoid oxidation

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