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Distribution and Composition of Selenium in A. bisulcatus Seeds and Associated Fungal Endophytes

This study investigates the elemental composition of selenium (Se), zinc (Zn), and calcium (Ca) in seeds of A. bisulcatus and its associated fungal endophytes. Using µXRF mapping and XANES analysis, we illustrate the distribution of these elements within germinating seeds and the fungal mycelium. Photographic representations highlight the emergence of fungal endophytes and their interaction with the seed's internal environment. Our findings provide insights into the role of selenium in plant-fungi interactions and elemental cycling in ecosystems.

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Distribution and Composition of Selenium in A. bisulcatus Seeds and Associated Fungal Endophytes

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  1. SeCa A D G 74% C-Se-C 1 mm 20% Se0 6% SeO32- E F B 59% C-Se-C 19% SeO32- 22% Se0 o o o o o C o 98% C-Se-C o o B Se o o Se Se 2% SeO32- o Figure 6. (A) Photograph of an A. bisulcatus seed. (B) µXRF map showing distribution of Se (red), Zn (green) and Ca (blue) in the seed. (C) Se composition in the embryo within the seed (white circles in B) as determined by XANES. (D) Photograph of fungal endophyte emerging from germinating A. bisulcatus seed. (E) µXRF map showing distribution of Se (red) and Ca (green) in endophyte-containing A. bisulcatus seed and in the mycelium of the emerging endophytic fungus (inset). (F) Se composition in fungal mycelium growing out from the seed (white circles in E), and (G) Secomposition in the endophyte-containing seed (black circle in E)as determined by XANES. 0.5 mm SeZnCa

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