Pivotal role of heterotrimeric G protein in the crosstalk between sugar signaling and abiotic stress response in plants

Zou, Wenjiao; Yu, Qian; Ma, Yu; Sun, Guoning; Feng, Xue; Ge, Lei

doi:10.1016/j.plaphy.2024.108567

Cited by 8 publications

(2 citation statements)

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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 ]. Also, SUC, as a non-structural sugar, has a high solubility, exhibiting multiple physiological functions, such as an energy source, a nutrient, an osmotic adjustment substance, and a reactive oxygen species (ROS) scavenger [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Also, SUC, as a non-structural sugar, has a high solubility, exhibiting multiple physiological functions, such as an energy source, a nutrient, an osmotic adjustment substance, and a reactive oxygen species (ROS) scavenger [ 15 , 16 , 17 ]. In addition, SUC is a short- and long-distance signaling molecule which regulates seed germination, seedling establishment, and plant growth and development, as well as the response and adaptation to environmental stresses [ 1 , 13 , 14 , 16 , 17 ]. In potato and rice plants, SUC treatment could boost thermotolerance by activating the ROS-scavenging system [ 18 , 19 ], but the relationship between SUC-promoted thermotolerance and H 2 S signaling is not widely known.…”

Section: Introductionmentioning

confidence: 99%

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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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