Nitrogen drives plant growth to the detriment of leaf sugar and steviol glycosides metabolisms in Stevia (Stevia rebaudiana Bertoni)

Sun, Yuming; Hou, Menglan; Mur, Luis A. J.; Yang, Yongheng; Zhang, Ting; Xu, Xiaoyang; Huang, Shihua; Tong, Haiying

doi:10.1016/j.plaphy.2019.06.008

Cited by 24 publications

(18 citation statements)

References 64 publications

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“…However, extensive studies illustrated that N fertilization adversely regulates SG concentrations in stevia leaves (Barbet-Massin et al 2015; Karimi and Moradi 2018;Tavarini et al 2015). Our previous study also demonstrated the negative relationships between N fertilization rates and SG concentrations, which were linked to either the dilution effect caused by biomass formation or the soluble sugar accumulation due to N deprivation (Sun et al 2019a). All these findings indicate the dispersal responses of leaf biomass and SG concentrations to N fertilization, which in turn imply that SG productivity can be enhanced by manipulating N fertilization strategies.…”

Section: Introductionmentioning

confidence: 64%

“…8' propagated from cuttings were transplanted on June 6. The basic properties of the yellow-brown soil of the experimental field were measured, as pH 6.72 (soil:H 2 O = 1:2.5), organic matter 27.72 mg g −1 , total N 1.528 mg g −1 , Olsen-P 63.97 mg kg −1 , and NH 4 OAc-K 347.72 mg kg −1 (Sun et al 2019a).…”

Section: Plant Materials and Experimental Conditionsmentioning

confidence: 99%

“…1). The CK treatment received no N fertilizer and was identical to the N0 treatment in our previous study (Sun et al 2019a). Phosphorus (P, in the form of calcium superphosphate) and potassium (K, in the form of potassium sulfate) fertilizers were applied as base fertilizers (on June 6) in all treatments.…”

Section: Plant Materials and Experimental Conditionsmentioning

confidence: 99%

“…SGs are carbon (C)-based tetracyclic diterpenoid compounds which derived from the glycolysis products and the subsequent 2-methyl-D-erythritol 4-phosphate pathways (Wang et al 2016a;Yadav and Guleria 2012). When the SG metabolism interacts with N fertilization, stevia growth and SG concentrations show opposite responses to leaf N status; these responses may result from dilution by biomass or from the inhibition of the plant C-based metabolism (Barbet-Massin et al 2015;Sun et al 2019a). In the current work, the same significant negative relationships between leaf N and SG concentrations were again exhibited in individual overall growth stages (Fig.…”

Section: N and Tsg Accumulation At Different Growth Stagesmentioning

confidence: 99%

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Optimized Nitrogen Topdressing Strategies Enhance Steviol Glycoside Productivity in Stevia (Stevia rebaudiana Bertoni) Plants

Sun

Yang

Hou

et al. 2020

J Soil Sci Plant Nutr

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The nitrogen (N) management is crucial to stevia growth and steviol glycoside (SG) production. Although previous studies have concentrated on the impacts caused by N fertilization rates, very few studies are concerning N topdressing strategies. We hypothesized that stevia biomass and SG productivity can be effectively increased by altering the ratio of base fertilization:first topdressing at the seedling stage:second topdressing at the branching stage. The current plot experiment was undertaken to evaluate such effects. Compared with one-time basal fertilization, optimized N topdressing ratios (especially the 5:3:2 and 4:3:3 ratios) significantly enhanced the leaf biomass formation and aboveground N accumulation. Different results were observed for the leaf SG concentrations, and increasing the topdressing proportions critically reduced the total leaf SG concentrations (3.3-24.7%) at the harvest stage. The highest values for total SG accumulation were exhibited under the 6:4:0 and 5:3:2 topdressing strategies, which depend on the changes in biomass and SG concentration. Moreover, a significant negative correlation between leaf SGs and the N concentration was observed at all growth stages, but a positive correlation was observed with the leaf C/N ratio and soluble sugar concentrations. Our results suggest the potential for increasing SG productivity by optimizing N fertilization regimes, especially with an appropriate reduction in the topdressing ratio after the vegetative growth stage. Our findings further expanded the effect of topdressing strategies on SG production based on the N fertilization levels.

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Section: Introductionmentioning

confidence: 64%

Section: Plant Materials and Experimental Conditionsmentioning

confidence: 99%

Section: Plant Materials and Experimental Conditionsmentioning

confidence: 99%

Section: N and Tsg Accumulation At Different Growth Stagesmentioning

confidence: 99%

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Optimized Nitrogen Topdressing Strategies Enhance Steviol Glycoside Productivity in Stevia (Stevia rebaudiana Bertoni) Plants

Sun

Yang

Hou

et al. 2020

J Soil Sci Plant Nutr

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“…The phenylpropanoid pathway plays an important part in defence and the key regulatory enzyme in this pathway, phenylalanine ammonia_lyase (PAL), is involved in the synthesis of secondary antimicrobial compounds [122]. Generally, genes encoding general phenylpropanoid metabolism such as PAL, cinnamate-4-hydroxylase (C4H) and 4-coumarate: CoA ligase (4CL) are all up-regulated by N deficiency [56,123], while decreased PAL activity has been seen with N fertilization [60,124]. However, discrete responses were reported when challenged with pathogens.…”

Section: Defence-related Enzymesmentioning

confidence: 99%

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Sun

Wang

Mur

et al. 2020

IJMS

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133

113

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Nitrogen (N) is one of the most important elements that has a central impact on plant growth and yield. N is also widely involved in plant stress responses, but its roles in host-pathogen interactions are complex as each affects the other. In this review, we summarize the relationship between N nutrition and plant disease and stress its importance for both host and pathogen. From the perspective of the pathogen, we describe how N can affect the pathogen’s infection strategy, whether necrotrophic or biotrophic. N can influence the deployment of virulence factors such as type III secretion systems in bacterial pathogen or contribute nutrients such as gamma-aminobutyric acid to the invader. Considering the host, the association between N nutrition and plant defence is considered in terms of physical, biochemical and genetic mechanisms. Generally, N has negative effects on physical defences and the production of anti-microbial phytoalexins but positive effects on defence-related enzymes and proteins to affect local defence as well as systemic resistance. N nutrition can also influence defence via amino acid metabolism and hormone production to affect downstream defence-related gene expression via transcriptional regulation and nitric oxide (NO) production, which represents a direct link with N. Although the critical role of N nutrition in plant defences is stressed in this review, further work is urgently needed to provide a comprehensive understanding of how opposing virulence and defence mechanisms are influenced by interacting networks.

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Plant nutritional value of aquaculture water produced by feeding Nile tilapia (Oreochromis niloticus) alternative protein diets: A lettuce and basil case study

Jones,

Shaw,

Chen

et al. 2023

Plants People Planet

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Societal Impact StatementRefining circular multitrophic food production methods, which integrate plant, fish, and insect outputs, is imperative for environmental sustainability. Our findings suggest that the right protein choices in fish feed, like black soldier fly meal and poultry meal, can notably enhance the nutrient profile of fish waste water. This, in turn, is conducive for hydroponic cultivation, enhancing the nutritional attributes of plants like basil and lettuce. As we reduce environmental impact and optimize resource use, it is evident that our food ecosystems are deeply intertwined. Harnessing these synergies could redefine our approach to food production, paving the way for a more sustainable global future.Summary Optimization of nutrient use efficiencies in circular multitrophic food production systems (i.e., plant, fish, and insect production) is crucial for sustainability. This study tested how protein ingredient choice in fish feed influences the plant nutritional value of the fish waste water when used for hydroponic crop production. Waste water samples were obtained from recirculating aquaculture systems (RAS) in which Nile tilapia (Oreochromis niloticus) were fed different single protein source diets—black soldier fly meal (BSFM), poultry by‐product meal (PM), poultry blood meal (PBM), and fish meal. Water was analyzed for plant nutrients and used for lettuce and basil cultivation to evaluate their suitability for hydroponic crop production—viz. yield, mineral nutrient, and selected secondary metabolite levels. BSFM RAS water had the highest concentrations of K, Mg, and micronutrients (Cu, Mn, Mo, Zn) of the RAS waters, whereas PM RAS water contained the highest P concentration and had a mean pH of 6.5 closer to the optimum pH for hydroponic plants. These RAS waters consequently lead to the highest yields in basil and lettuce indicating the importance of the aforementioned factors. From a plant production perspective, BSFM appears promising as a protein source in fish feeds for aquaponics. Usage of RAS waters for plant production helps reduce (i) environmental impact of RAS water and (ii) resource input in plant production. Longer term RAS trials should be conducted to determine the maximum nutrient concentrations achievable during fish production with diets including BSFM as the main protein source.

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Nitrogen drives plant growth to the detriment of leaf sugar and steviol glycosides metabolisms in Stevia (Stevia rebaudiana Bertoni)

Abstract: Nitrogen drives plant growth to the detriment of leaf sugar and steviol glycosides metabolisms in Stevia (Stevia rebaudiana Bertoni).

Cited by 24 publications

References 64 publications

Optimized Nitrogen Topdressing Strategies Enhance Steviol Glycoside Productivity in Stevia (Stevia rebaudiana Bertoni) Plants

Optimized Nitrogen Topdressing Strategies Enhance Steviol Glycoside Productivity in Stevia (Stevia rebaudiana Bertoni) Plants

Unravelling the Roles of Nitrogen Nutrition in Plant Disease Defences

Plant nutritional value of aquaculture water produced by feeding Nile tilapia (Oreochromis niloticus) alternative protein diets: A lettuce and basil case study

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