Sugars as the regulators of dormancy and sprouting in geophytes

Sheikh, Firdous Rasool; Jose-Santhi, Joel; Kalia, Diksha; Singh, Kulwinder; Singh, Rajesh Kumar

doi:10.1016/j.indcrop.2022.115817

Cited by 26 publications

(14 citation statements)

References 127 publications

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“…With the photoaging of MPs, the soluble sugar content in the roots of PA and PE MP treatment groups rebounded. Considering that sugar is a substrate for metabolism and a signaling molecule for various pathways [ 32 ], the inhibition of soluble gluconeogenesis indicates a possible impairment of carbon metabolism. Different types of MPs may have an effect on nutrients such as nitrogen and phosphorus [ 33 , 34 ], which may ultimately alter the accumulation of nutrients in plants.…”

Section: Resultsmentioning

confidence: 99%

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Kang

Liu

Wang

et al. 2023

Toxics

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Recent studies have confirmed that changes in the physical properties of microplastics (MPs) trigger toxicological effects and ecological risks. To explore the toxicity of different types of MPs on plants, and the influence of MP photoaging, this study investigated the toxicity mechanisms of pristine, 7 and 14 d photoaged polystyrene (PS), polyamide (PA), polyethylene (PE), and polyethylene terephthalate (PET) MPs on seed germination, root growth, nutrient fraction, oxidative stress, and antioxidant systems of Pisum sativum L. (pea) seedlings. The results showed that pristine PS and 14 d photoaged PET inhibited seed germination. Compared to the pristine MPs, photoaged MPs had negative effects on root elongation. Moreover, photoaged PA and PE impeded the nutrient transport of soluble sugars from roots to stems. Notably, the production of superoxide anion radicals (•O2−) and hydroxyl radicals (•OH) through the photoaging of MPs exacerbated oxidative stress and reactive oxygen species formation in roots. Antioxidant enzyme data revealed that the activities of superoxide dismutase and catalase were significantly activated in photoaged PS and PE, respectively, in order to scavenge •O2− and hydrogen peroxide (H2O2) accumulation and alleviate lipid peroxidation levels in cells. These findings provide a new research perspective on the phytotoxicity and ecological risk of photoaged MPs.

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Section: Resultsmentioning

confidence: 99%

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Kang

Liu

Wang

et al. 2023

Toxics

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“…The six indices of fruit tannin, fat, total flavonoid contents, infructescence reducing sugar, protein, and total flavonoid contents were the main factors responsible for the quality differences in thirty-one H. acerba germplasms. Sugars not only provide the energy for plant growth and development as a respiratory substrate, but also serve as metabolic intermediates to synthesize other substances through metabolic pathways [51]. In the H. acerba infructescence, the soluble sugar content was the highest among the components, up to 61%, and soluble sugar content was highly significant and positively correlated with total flavonoid content.…”

Section: Discussionmentioning

confidence: 98%

Comprehensive Evaluation of Quality Traits of Hovenia acerba Germplasm Resources in Fujian Province

Yang

Chen

Lin

et al. 2023

Forests

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Hovenia acerba is a precious medicinal and edible tree. We assessed the genetic variation of H. acerba quality traits and conducted a comprehensive germplasm resource evaluation to provide a theoretical basis for breeding edible, medicinal, and edible/medicine combination varieties. We evaluated 31 H. acerba germplasm resources, including 12 infructescence and 8 fruit quality traits using correlation, principal component, and cluster analyses. The results showed that there were significant differences in all quality traits, with an average coefficient of variation greater than 0.20, an average genetic diversity greater than 1.80, and an average repeatability greater than 0.90. The average genetic variation and repeatability of quality traits in infructescence were higher than fruit. Infructescence K, Ca, Mn, Mg, and reducing sugar contents are important indicators in evaluating infructescence and fruit quality traits, and infructescence K, Mg, and reducing sugar contents are also quality innovation indices of H. acerba germplasms. Tannin, protein, and soluble sugar were the most suitable quality components for screening, followed by reducing sugar, starch, fat, total saponins, and total flavones. According to principal component factor scores and cluster analysis results, specific genotypes were selected as breeding materials for infructescence protein, tannin, flavone, reductive sugar, fruit tannin, fat, flavonoid, saponin, protein, and starch. The correlation analysis with environmental factors showed that the total amount of applied water could influence H. acerba infructescence and fruit quality. In conclusion, the variability of H. acerba germplasm resources was rich, and selection potential is large, which is beneficial to germplasm quality innovation and breeding.

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“…Cell wall invertases cleave sucrose, yielding glucose and fructose, which are then taken up by hexose transporters and transported into the cell. Further, Starch Synthase (SS) and Starch Branching Enzymes convert them into starch (Sheikh et al 2022). Corm initiation in saffron was sustained with high upregulation of cell wall invertases, starch synthases, starch branching and sucrose cleavage enzymes (Figures 4‐6).…”

Section: Discussionmentioning

confidence: 99%

Transcriptional dynamics in source‐sink tissues identifies molecular factors regulating the corm development process in saffron (Crocus sativus L.)

Jose‐Santhi,

Sheikh,

Kalia

et al. 2024

Physiologia Plantarum

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AimsGeophytic plants have evolved to develop underground storage organs (USO) in the active growing season to withstand harsh environments as well as to coordinate growth and reproduction when conditions are favourable. Saffron is an autumn flowering geophyte and an expensive spice crop restricted to certain geographical locations in the world. Saffron, being sterile, does not produce seeds and thus propagates only through corms, the quality of which determines its yield. Corm development in saffron is unexplored and the underlying molecular mechanism is still elusive. In this study, we performed an extensive characterisation of the transcriptional dynamics in the source (leaf) and sink (corm) tissues during corm development in saffron.Key resultsVia morphological and transcriptome studies, we identified molecular factors regulating corm development process in saffron, which defined corm development into three stages: the initiation stage demonstrates enhanced vegetative growth aboveground and swelling of shoot base belowground due to active cell division & carbohydrate storage; the bulking stage comprises of increased source and sink strength, active photosynthesis, circadian gating and starch accumulation; the maturation stage represents reduced source and sink strength, lowered photosynthesis, sugar transport, starch synthesis and cell cycle arrest.UtilityThe global view of transcriptional changes in source and sink identifies similar and new molecular factors involved in the saffron corm development process compared to USO formation in other geophytes and provides a valuable resource for dissecting the molecular network underlying the corm development. We propose a hypothetical model based on data analysis, of how molecular factors via environmental cues can regulate the corm development process in saffron.

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Sugars as the regulators of dormancy and sprouting in geophytes

Cited by 26 publications

References 127 publications

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Comprehensive Evaluation of Quality Traits of Hovenia acerba Germplasm Resources in Fujian Province

Transcriptional dynamics in source‐sink tissues identifies molecular factors regulating the corm development process in saffron (Crocus sativus L.)

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