The Role of Post‐Translational Enzyme Modifications in the Metabolic Adaptations of Phosphorus‐Deprived Plants

Plaxton, William C.; Shane, Michael W.

doi:10.1002/9781118958841.ch4

Cited by 14 publications

(8 citation statements)

References 65 publications

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“…Furthermore, N is not the only limiting factor for plant growth. Phosphorus, another limiting factor (Plaxton and Lambers, 2015) derived solely from rock mining in few and limited geographical areas around the globe (Cordell and White, 2011), would also face supply disruptions in the context of peak oil. Decreased availability of phosphate mineral fertiliser imports could further decrease the availability of soil mineral N (Ågren et al, 2012;Ringeval et al, 2019).…”

Section: A Nutritional and Mono-nutrient Approachmentioning

confidence: 99%

European Agriculture's Robustness to Input Supply Declines: A French Case Study

Pinsard¹,

Accatino²

2022

SSRN Journal

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Section: A Nutritional and Mono-nutrient Approachmentioning

confidence: 99%

European Agriculture's Robustness to Input Supply Declines: A French Case Study

Pinsard¹,

Accatino²

2022

SSRN Journal

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“…Phosphorus (P) is one of the principal macronutrients for plant growth and productivity, and it is part of the crucial organic components such as nucleic acids, proteins, enzymes and phospholipids (Hawkesford et al, 2012;Plaxton and Shane, 2015;Lambers, 2022). P participates in a series of physiological, biochemical and metabolomic processes in plants such as photosynthesis, respiration, energy generation, nucleic acid synthesis, nitrogen (N) fixation and redox reactions (Liang et al, 2014;Ham et al, 2018;Lambers, 2022).…”

Section: Introductionmentioning

confidence: 99%

Improving phosphorus acquisition efficiency through modification of root growth responses to phosphate starvation in legumes

Chen

Wang²,

Cardoso³

et al. 2023

Front. Plant Sci.

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Phosphorus (P) is one of the essential macronutrients for plant growth and development, and it is an integral part of the major organic components, including nucleic acids, proteins and phospholipids. Although total P is abundant in most soils, a large amount of P is not easily absorbed by plants. Inorganic phosphate (Pi) is the plant-available P, which is generally immobile and of low availability in soils. Hence, Pi starvation is a major constraint limiting plant growth and productivity. Enhancing plant P efficiency can be achieved by improving P acquisition efficiency (PAE) through modification of morpho-physiological and biochemical alteration in root traits that enable greater acquisition of external Pi from soils. Major advances have been made to dissect the mechanisms underlying plant adaptation to P deficiency, especially for legumes, which are considered important dietary sources for humans and livestock. This review aims to describe how legume root growth responds to Pi starvation, such as changes in the growth of primary root, lateral roots, root hairs and cluster roots. In particular, it summarizes the various strategies of legumes to confront P deficiency by regulating root traits that contribute towards improving PAE. Within these complex responses, a large number of Pi starvation-induced (PSI) genes and regulators involved in the developmental and biochemical alteration of root traits are highlighted. The involvement of key functional genes and regulators in remodeling root traits provides new opportunities for developing legume varieties with maximum PAE needed for regenerative agriculture.

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“…However, plants have evolved a Pi starvation response (PSR) that integrates various molecular, metabolic, physiological, and morphological adaptations to improve soil Pi acquisition while reprioritizing internal use of Pi (Dissanayaka et al ., 2021). A variety of events triggered by Pi deprivation include enhanced transcription and translation of Pi‐starvation inducible ( PSI ) genes, altered post‐translational modifications of many proteins, shifts in activity or subcellular localization of critical enzymes, and modified flux through key metabolic pathways (Plaxton & Shane, 2015). The latter includes upregulation of alternative ‘bypass’ enzymes of cytosolic glycolysis and mitochondrial electron transport that facilitate respiration in Pi‐deprived (−Pi) plant cells (Supporting Information Fig.…”

Section: Introductionmentioning

confidence: 99%

Glutamate decarboxylase‐1 is essential for efficient acclimation of Arabidopsis thaliana to nutritional phosphorus deprivation

Benidickson,

Raytek,

Hoover

et al. 2023

New Phytologist

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Summary Glutamate decarboxylase (GAD) is a Ca2+‐calmodulin‐activated, cytosolic enzyme that produces γ‐aminobutyrate (GABA) as the committed step of the GABA shunt. This pathway bypasses the 2‐oxoglutarate to succinate reactions of the tricarboxylic acid (TCA) cycle. GABA also accumulates during many plant stresses. We tested the hypothesis that AtGAD1 (At5G17330) facilitates Arabidopsis acclimation to Pi deprivation. Quantitative RT‐PCR and immunoblotting revealed that AtGAD1 transcript and protein expression is primarily root‐specific, but inducible at lower levels in shoots of Pi‐deprived (−Pi) plants. Pi deprivation reduced levels of the 2‐oxoglutarate dehydrogenase (2‐OGDH) cofactor thiamine diphosphate (ThDP) in shoots and roots by > 50%. Growth of −Pi atgad1 T‐DNA mutants was significantly attenuated relative to wild‐type plants. This was accompanied by: (i) an > 60% increase in shoot and root GABA levels of −Pi wild‐type, but not atgad1 plants, and (ii) markedly elevated anthocyanin and reduced free and total Pi levels in leaves of −Pi atgad1 plants. Treatment with 10 mM GABA reversed the deleterious development of −Pi atgad1 plants. Our results indicate that AtGAD1 mediates GABA shunt upregulation during Pi deprivation. This bypass is hypothesized to circumvent ThDP‐limited 2‐OGDH activity to facilitate TCA cycle flux and respiration by −Pi Arabidopsis.

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The Role of Post‐Translational Enzyme Modifications in the Metabolic Adaptations of Phosphorus‐Deprived Plants

Cited by 14 publications

References 65 publications

European Agriculture's Robustness to Input Supply Declines: A French Case Study

European Agriculture's Robustness to Input Supply Declines: A French Case Study

Improving phosphorus acquisition efficiency through modification of root growth responses to phosphate starvation in legumes

Glutamate decarboxylase‐1 is essential for efficient acclimation of Arabidopsis thaliana to nutritional phosphorus deprivation

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