How abiotic stresses trigger sugar signaling to modulate leaf senescence?

Asad, Muhmmad Asad Ullah; Yan, Zhang; Zhou, Lujian; Guan, Xianyue; Cheng, Fangmin

doi:10.1016/j.plaphy.2024.108650

Cited by 4 publications

(2 citation statements)

References 154 publications

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“…There were several lines of evidence on the possible synergistic effect of the three mechanisms of leaf nutrient resorption. Firstly, the positive effect of leaf-fall date on NuRE aligned with the negative impact of NSC concentration on NuRE, where higher NSC levels, especially soluble sugars, could accelerate early senescence ( Figure S7 ) [ 65 , 71 ]. Secondly, the relationship between leaf-fall date and NuRE corresponded with the effects of changes in chloroplast pigments on NuRE ( Figure S7 ).…”

Section: Discussionmentioning

confidence: 99%

New Intrinsic Ecological Mechanisms of Leaf Nutrient Resorption in Temperate Deciduous Trees

Wang,

Guo,

Wang

et al. 2024

Plants

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Leaf nutrient resorption is a critical process in plant nutrient conservation during leaf senescence. However, the ecological mechanisms underlying the large variability in nitrogen (NRE) and phosphorous (PRE) resorption efficiencies among trees remain poorly understood. We conducted a comprehensive study on NRE and PRE variability using 61 tree individuals of 10 temperate broad-leaved tree species. Three potentially interrelated intrinsic ecological mechanisms (i.e., leaf senescence phenology, leaf pigments, and energy residual) were verified. We found that a delayed leaf senescence date, increased degradation of chlorophylls and carotenoids, biosynthesis of anthocyanins, and reduced nonstructural carbohydrates were all positively correlated with NRE and PRE at the individual tree level. The intrinsic factors affecting resorption efficiency were ranked in decreasing order of importance: leaf pigments > energy residual > senescence phenology. These factors explained more variability in NRE than in PRE. Our findings highlight the significance of these three ecological mechanisms in leaf nutrient resorption and have important implications for understanding how nutrient resorption responds to climate change.

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Section: Discussionmentioning

confidence: 99%

New Intrinsic Ecological Mechanisms of Leaf Nutrient Resorption in Temperate Deciduous Trees

Wang,

Guo,

Wang

et al. 2024

Plants

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“…Sucrose (SUC) is a disaccharide and is a source of cellular energy and a signaling molecule, regulating the whole life processes [ 9 , 10 , 11 ]. In general, SUC can exert its signaling role in plants through multiple pathways, which are involved in hexose kinase-dependent and hexose kinase-independent signaling [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Metabolic and Functional Interactions of H2S and Sucrose in Maize Thermotolerance through Redox Homeodynamics

Li,

Zhou,

2024

IJMS

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Hydrogen sulfide (H2S) is a novel gasotransmitter. Sucrose (SUC) is a source of cellular energy and a signaling molecule. Maize is the third most common food crop worldwide. However, the interaction of H2S and SUC in maize thermotolerance is not widely known. In this study, using maize seedlings as materials, the metabolic and functional interactions of H2S and SUC in maize thermotolerance were investigated. The data show that under heat stress, the survival rate and tissue viability were increased by exogenous SUC, while the malondialdehyde content and electrolyte leakage were reduced by SUC, indicating SUC could increase maize thermotolerance. Also, SUC-promoted thermotolerance was enhanced by H2S, while separately weakened by an inhibitor (propargylglycine) and a scavenger (hypotaurine) of H2S and a SUC-transport inhibitor (N-ethylmaleimide), suggesting the interaction of H2S and SUC in the development of maize thermotolerance. To establish the underlying mechanism of H2S–SUC interaction-promoted thermotolerance, redox parameters in mesocotyls of maize seedlings were measured before and after heat stress. The data indicate that the activity and gene expression of H2S-metabolizing enzymes were up-regulated by SUC, whereas H2S had no significant effect on the activity and gene expression of SUC-metabolizing enzymes. In addition, the activity and gene expression of catalase, glutathione reductase, ascorbate peroxidase, peroxidase, dehydroascorbate reductase, monodehydroascorbate reductase, and superoxide dismutase were reinforced by H2S, SUC, and their combination under non-heat and heat conditions to varying degrees. Similarly, the content of ascorbic acid, flavone, carotenoid, and polyphenol was increased by H2S, SUC, and their combination, whereas the production of superoxide radicals and the hydrogen peroxide level were impaired by these treatments to different extents. These results imply that the metabolic and functional interactions of H2S and sucrose signaling exist in the formation of maize thermotolerance through redox homeodynamics. This finding lays the theoretical basis for developing climate-resistant maize crops and improving food security.

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Unveiling physiological responses and modulated accumulation patterns of specialized metabolites in Mentha rotundifolia acclimated to sub-tropical environment

Chatterjee,

Mitra

2024

Physiol Mol Biol Plants

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How abiotic stresses trigger sugar signaling to modulate leaf senescence?

Cited by 4 publications

References 154 publications

New Intrinsic Ecological Mechanisms of Leaf Nutrient Resorption in Temperate Deciduous Trees

New Intrinsic Ecological Mechanisms of Leaf Nutrient Resorption in Temperate Deciduous Trees

Metabolic and Functional Interactions of H2S and Sucrose in Maize Thermotolerance through Redox Homeodynamics

Unveiling physiological responses and modulated accumulation patterns of specialized metabolites in Mentha rotundifolia acclimated to sub-tropical environment

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