How does carbohydrate metabolism conribute to stress tolerance in plants?
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Carbohydrate metabolism plays a crucial role in enhancing stress tolerance in plants by serving as a key component in stress perception, signaling, and gene expression regulation. Sugars act as storage compounds, energy sources, and signaling molecules, aiding in plant adaptation to various abiotic stressors . Under stress conditions, alterations in carbohydrate metabolism, such as increased levels of sucrose, glucose, and fructose, help mitigate the negative effects of stress on plant productivity and physiological attributes . Abiotic stresses like drought, salinity, and extreme temperatures disrupt the balance between carbon fixation and consumption, affecting sugar levels and overall plant metabolism . Additionally, sugar transporters like SWEETs, SUTs, and MSTs regulate carbohydrate partitioning and stress tolerance mechanisms, highlighting the importance of understanding sugar transporter functions for developing stress-tolerant crops .
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|---|---|
100 Citations | Carbohydrate metabolism in plants contributes to stress tolerance by regulating osmotic balance, energy status, and gene expression, facilitated by sugar transporters like SWEETs, SUTs, and MSTs. |
01 Dec 2022 | Carbohydrate metabolism in plants, including glycolysis and the Krebs cycle, produces compounds like raffinose and proline that defend cell membranes, aiding stress tolerance through enzyme regulation and metabolite changes. |
3 Citations | Carbohydrate metabolism aids stress tolerance in plants by adjusting enzyme activity and sugar levels, as seen in wheat under heat stress and elevated CO2 conditions, enhancing photosynthesis and yield. |
13 May 2020 3 Citations | Carbohydrate metabolism in plants helps maintain metabolic functions under abiotic stress by providing energy, regulating growth, and supporting physiological processes like photosynthesis and respiration. |
| Carbohydrate metabolism contributes to plant stress tolerance by serving as storage, energy sources, and signaling molecules, aiding in adaptation to various abiotic stressors like drought and salinity. |
Related Questions
What are the specific carbohydrate metabolism enzymes involved in stress tolerance in soya?5 answersCarbohydrate metabolism enzymes play a crucial role in stress tolerance in soybeans. Glucose-6-phosphate dehydrogenase (G6PDH) is involved in soybean cultivars' tolerance to low nitrogen stress by affecting nitrogen metabolism. Additionally, fructose has been identified as a critical metabolite regulating hexokinase and phosphofructokinase to confer initial flooding stress tolerance in soybeans. Moreover, sucrose synthase (SS) family members, such as GmSS, are essential in sugar metabolism to enhance fruit quality in plants like soybeans. These enzymes, along with others like Xyloglucan endoglycosylase/hydrolase (XTH), contribute significantly to stress responses in soybeans, highlighting the importance of carbohydrate metabolism pathways in enhancing stress tolerance in soybean plants.
How does carbohydrate metabolism conribute to stress tolerance in soya?5 answersCarbohydrate metabolism plays a crucial role in stress tolerance in soybeans. Under flooding stress, metabolites involved in carbohydrate pathways, such as fructose, are highlighted as key players in conferring initial flooding tolerance by regulating enzymes like hexokinase and phosphofructokinase. Additionally, in response to shade stress, soybean seedlings show differential accumulation of proteins related to carbohydrate metabolism, particularly in the biosynthesis of cell wall polysaccharides, indicating a rapid decline in saccharides under shading conditions. Furthermore, under nitrogen deficiency stress, wild soybean genotypes exhibit enhanced glycolysis and sugar metabolism, along with increased accumulation of organic acids, contributing to their ability to maintain photosynthesis and nutrient balance under low nitrogen conditions. These findings collectively highlight the significance of carbohydrate metabolism in enhancing stress tolerance mechanisms in soybeans.
What is the plant metabolism during stress?5 answersPlant metabolism during stress involves intricate adjustments in response to abiotic and biotic stresses. Under water deficit stress, plants exhibit decreased growth, chlorophyll content, and leaf relative water content, while accumulating osmolytes like proline and soluble carbohydrates. Biotic stresses trigger nitrogen remobilization into signaling molecules like polyamines and proline, enhancing defense responses. Environmental stresses lead to the production of reactive oxygen species, affecting glycolysis and Krebs cycle, resulting in the accumulation of specific compounds for stress defense. Abiotic and biotic stresses impact metabolites and gene expression, with metabolites acting as free radical scavengers, osmoprotectants, and signaling molecules. Metabolomics studies highlight the role of primary and secondary metabolites in stress tolerance, aiding in breeding and crop improvement programs.
What are the effects of drought stress on the proline and carbohydrates of plants?5 answersDrought stress significantly impacts proline and carbohydrate metabolism in plants. Proline accumulation serves as an osmolyte, signaling molecule, and antioxidant defense mechanism under stress conditions. Plants like mulberry and Chinese fir exhibit alterations in non-structural carbohydrates (NSCs) under drought. Mulberry cultivars showed changes in NSCs levels and gene expressions in response to drought, with different strategies observed in roots and leaves. Similarly, Chinese fir displayed varying NSCs distribution patterns in different organs under drought stress, affecting fructose, glucose, sucrose, soluble sugars, and starch content. Acetic acid treatment enhanced proline levels and gene expression related to proline biosynthesis, aiding in osmotic adjustment and stress tolerance in maize plants under drought conditions.
How does drought stress affect plant metabolism in the field?5 answersDrought stress affects plant metabolism in the field by causing various changes in physiological, biochemical, and molecular processes. Under drought conditions, plants exhibit decreased growth and development, reduced chlorophyll content, and lower photosynthetic rates. Stomatal closure is one of the initial responses to drought stress, leading to a series of physiological and biochemical adjustments aimed at balancing photosynthesis and enhancing plant defense mechanisms. These adjustments include the stimulation of antioxidant systems, accumulation of osmolytes, and synthesis of aquaporins. Drought stress also affects carbon metabolism, with changes observed in the activities of enzymes involved in carbohydrate metabolism. Additionally, nitrogen metabolism is influenced by drought stress, with increased levels of ammonia and changes in the activities of nitrogen assimilating enzymes. Overall, plants respond to drought stress by altering their metabolic processes to minimize water loss and enhance their ability to survive under limited water availability.
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