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   https://doi.org/10.1038/s41477-025-02091-w  

   Gashu, Kelem; Kaste, Joshua_A M; Roje, Sanja; Walker, Berkley J (September 2025, Nature Plants)

   Photorespiration is the second largest carbon flux in most leaves and is integrated into metabolism broadly including one-carbon (C1) metabolism. Photorespiratory intermediates such as serine and others may serve as sources of C1 units, but it is unclear to what degree this happens in vivo, whether altered photorespiration changes flux to C1 metabolism, and if so through which intermediates. To clarify these questions, we quantified carbon flux from photorespiration to C1 metabolism using 13CO2 labelling and isotopically non-stationary metabolic flux analysis in Arabidopsis thaliana under different O2 concentrations which modulate photorespiration. The results revealed that ~5.8% of assimilated carbon passes to C1 metabolism under ambient photorespiratory conditions, but this flux greatly decreases under limited photorespiration. Furthermore, the primary carbon flux from photorespiration to C1 metabolism is through serine. Our results provide fundamental insight into how photorespiration is integrated into C1 metabolism, with possible implications for C1 metabolic response to climate change. 

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2. Metabolic flux analysis of secondary metabolism in plants

   https://doi.org/10.1016/j.mec.2020.e00123  

   Shih, Meng-Ling; Morgan, John A. (June 2020, Metabolic Engineering Communications)

   null (Ed.)
3. Indirect estimation of bedload flux from modern sand-bed rivers and ancient fluvial strata

   https://doi.org/10.1130/G40161.1  

   Mahon, Robert C.; McElroy, Brandon (May 2018, Geology)
4. Towards rational control of seed oil composition: dissecting cellular organization and flux control of lipid metabolism

   https://doi.org/10.1093/plphys/kiae658  

   Bates, Philip_D; Shockey, Jay (December 2024, Plant Physiology)

   Abstract Plant lipids represent a fascinating field of scientific study, in part due to a stark dichotomy in the limited fatty acid (FA) composition of cellular membrane lipids vs the huge diversity of FAs that can accumulate in triacylglycerols (TAGs), the main component of seed storage oils. With few exceptions, the strict chemical, structural, and biophysical roles imposed on membrane lipids since the dawn of life have constrained their FA composition to predominantly lengths of 16–18 carbons and containing 0–3 methylene-interrupted carbon-carbon double bonds in cis-configuration. However, over 450 “unusual” FA structures can be found in seed oils of different plants, and we are just beginning to understand the metabolic mechanisms required to produce and maintain this dichotomy. Here we review the current state of plant lipid research, specifically addressing the knowledge gaps in membrane and storage lipid synthesis from 3 angles: pathway fluxes including newly discovered TAG remodeling, key acyltransferase substrate selectivities, and the possible roles of “metabolons.” 

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5. Tapestry Beaver Pond Geochemistry

   https://doi.org/10.4211/hs.8bb8e869e2b9442989163fbaa1d616ea  

   Ledford, Sarah (July 2025, HydroShare)

   Major ion geochemistry and isotopes of nitrate for the Tapestry beaver pond in Atlanta, GA. Samples were collected from the surface from June 2019-March 2020 and from the hyporheic zone from June-August 2019. Logger data (DO and specific conductance at 10 minute intervals) were also collected from June-August 2019. Isotopes of nitrate (d15N and d18O) were measured for a subset of June-August 2019 surface and hyporheic samples. Data were used in the paper "Urban beaver dam shows hyporheic exchange helps mediate high nutrient groundwater and a high productivity pond" 

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