Journal Article

FZJ-2021-00804

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Wheat Can Access Phosphorus From Algal Biomass as Quickly and Continuously as From Mineral Fertilizer

Mau, L. (First author)FZJ* ; Kant, J. (Corresponding author)FZJ* ; Walker, R. ; Kuchendorf, C.FZJ* ; Schrey, S.FZJ* ; Roessner, U. ; Watt, M. (Last author)

2021
Frontiers Media Lausanne

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Please use a persistent id in citations: http://hdl.handle.net/2128/27040  doi:10.3389/fpls.2021.631314

Abstract: Algae can efficiently take up excess nutrients from waterways, making them a valuableresource potentially capable of replacing synthesized and mined fertilizers for agriculture.The capacity of algae to fertilize crops has been quantified, but it is not known how thealgae-derived nutrients become available to plants. We aimed to address this question:what are the temporal dynamics of plant growth responses to algal biomass? to betterpropose mechanisms by which plants acquire nutrients from algal biomass and therebystudy and promote those processes in future agricultural applications. Data from varioussources were transformed and used to reconstruct the nutrient release from the algaeChlorella vulgaris and subsequent uptake by wheat (Triticum aestivum L.) (as reportedin Schreiber et al., 2018). Plants had received 0.1x or 1x dried algae or wet algae, orzero, 0.1x or 1x mineral fertilizer calculated from agricultural practices for P applicationand grown to 55 days in three soils. Contents of P and other nutrients acquired fromalgae were as high as from mineral fertilizer, but varied based on moisture content andamount of algae applied to soils (by 55 days after sowing plants with 1x mineral fertilizerand 1x dried algae had 5.6 mg P g DWshoot; 2.2-fold more than those with 0 or 0.1xmineral fertilizer, 0.1x dried algae and wet algae, and 1x wet algae). Absolute and relativeleaf area growth and estimated P uptake rates showed similar dynamics, indicating thatwheat acquires P from algae quickly. A model proposes that algal fertilizer promoteswheat growth after rapid transformation in soil to inorganic nutrients. We concludetheoretically that phosphorus from algal biomass is available to wheat seedlings upon itsapplication and is released gradually over time with minor differences related to moisturecontent on application. The growth and P uptake kinetics hint at nutrient forms, includingN, and biomass stimulation worthy of research to further exploit algae in sustainableagriculture practices. Temporal resolved phenotype analyses in combination with amass-balance approach is helpful for understanding resource uptake from recycled andbiofertilizer sources by plants.

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 2172 - Utilization of renewable carbon and energy sources and engineering of ecosystem functions (POF4-217) (POF4-217)

Appears in the scientific report 2021

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