Global actions for a sustainable phosphorus future

Brownlie, Will J.; Sutton, Mark A.; Reay, Dave; Heal, Kate; Hermann, Ludwig; Kabbe, Christian; Spears, Bryan M.

doi:10.1038/s43016-021-00232-w

Cited by 94 publications

(49 citation statements)

References 33 publications

(40 reference statements)

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“…Phosphorus (P) is the second most essential macronutrient after nitrogen (N) for plant growth and development (Shafi et al, 2020). P-deficiency is one of the yield-limiting factors faced by over 40% of agricultural soils worldwide (Elhaissoufi et al, 2020;Brownlie et al, 2021), although P is quite abundant in the soil but mostly present in insoluble forms, rendering a very low concentration (0.1%) of P for plant uptake (Bindraban et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

et al. 2021

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Phosphorous (P) deficiency is a major challenge faced by global agriculture. Phosphate-solubilizing bacteria (PSB) provide a sustainable approach to supply available phosphates to plants with improved crop productivity through synergistic interaction with plant roots. The present study demonstrates an insight into this synergistic P-solubilizing mechanism of PSB isolated from rhizosphere soils of major wheat-growing agro-ecological zones of Pakistan. Seven isolates were the efficient P solubilizers based on in vitro P-solubilizing activity (233-365 μg ml–1) with a concomitant decrease in pH (up to 3.5) by the production of organic acids, predominantly acetic acid (∼182 μg ml–1) and gluconic acid (∼117 μg ml–1). Amplification and phylogenetic analysis of gcd, pqqE, and phy genes of Enterobacter sp. ZW32, Ochrobactrum sp. SSR, and Pantoea sp. S1 showed the potential of these PSB to release orthophosphate from recalcitrant forms of phosphorus. Principal component analysis indicates the inoculation response of PSB consortia on the differential composition of root exudation (amino acids, sugars, and organic acids) with subsequently modified root architecture of three wheat varieties grown hydroponically. Rhizoscanning showed a significant increase in root parameters, i.e., root tips, diameter, and surface area of PSB-inoculated plants as compared to uninoculated controls. Efficiency of PSB consortia was validated by significant increase in plant P and oxidative stress management under P-deficient conditions. Reactive oxygen species (ROS)-induced oxidative damages mainly indicated by elevated levels of malondialdehyde (MDA) and H2O2 contents were significantly reduced in inoculated plants by the production of antioxidant enzymes, i.e., superoxide dismutase, catalase, and peroxidase. Furthermore, the inoculation response of these PSB on respective wheat varieties grown in native soils under greenhouse conditions was positively correlated with improved plant growth and soil P contents. Additionally, grain yield (8%) and seed P (14%) were significantly increased in inoculated wheat plants with 20% reduced application of diammonium phosphate (DAP) fertilizer under net house conditions. Thus, PSB capable of such synergistic strategies can confer P biofortification in wheat by modulating root morphophysiology and root exudation and can alleviate oxidative stress under P deficit conditions.

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Section: Introductionmentioning

confidence: 99%

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

et al. 2021

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“…Many previous studies have focused on single-factor management interventions in crop production, the efficacy of which is often limited (Li et al, 2011;Shen et al, 2011;Withers et al, 2015). Meeting this challenge calls for a transformative rather than an incremental approach to balance food security, environmental sustainability, and RP resource conservation (Brownlie et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Using knowledge-based management for sustainable phosphorus use in China

Gong

Xiang

et al. 2022

Science of The Total Environment

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“…A long-standing barrier to this mechanistic understanding lies in the difficulty in characterizing plant chemical composition and quantifying plant-available nutrients at the rhizosphere. Phosphorus (P) is a critical nutrient 2 , and poor P management poses a global risk for environmental sustainability and food security 3 – 5 . P limitation severely restricts photosynthesis and reduces CO 2 fixation 6 , but upregulates pathways associated with organic acid/carboxylate exudation 7 .…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic analysis reveals that soil phosphorus availability and plant allocation strategies impact feedstock quality of nutrient-limited switchgrass

et al. 2022

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The perennial native switchgrass adapts better than other plant species do to marginal soils with low plant-available nutrients, including those with low phosphorus (P) content. Switchgrass roots and their associated microorganisms can alter the pools of available P throughout the whole soil profile making predictions of P availability in situ challenging. Plant P homeostasis makes monitoring of P limitation via measurements of plant P content alone difficult to interpret. To address these challenges, we developed a machine-learning model trained with high accuracy using the leaf tissue chemical profile, rather than P content. By applying this learned model in field trials across two sites with contrasting extractable soil P, we observed that actual plant available P in soil was more similar than expected, suggesting that adaptations occurred to alleviate the apparent P constraint. These adaptations come at a metabolic cost to the plant that have consequences for feedstock chemical components and quality. We observed that other biochemical signatures of P limitation, such as decreased cellulose-to-lignin ratios, were apparent, indicating re-allocation of carbon resources may have contributed to increased P acquisition. Plant P allocation strategies also differed across sites, and these differences were correlated with the subsequent year’s biomass yields.

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Global actions for a sustainable phosphorus future

Cited by 94 publications

References 33 publications

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

Differential Root Exudation and Architecture for Improved Growth of Wheat Mediated by Phosphate Solubilizing Bacteria

Using knowledge-based management for sustainable phosphorus use in China

Spectroscopic analysis reveals that soil phosphorus availability and plant allocation strategies impact feedstock quality of nutrient-limited switchgrass

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