A link between citrate and proton release by proteoid roots of white lupin (Lupinus albus L.) grown under phosphorus-deficient conditions?

@article{Zhu2005ALB,
  title={A link between citrate and proton release by proteoid roots of white lupin (Lupinus albus L.) grown under phosphorus-deficient conditions?},
  author={Yiyong Zhu and Feng Yan and Christian Z{\"o}rb and Sven Schubert},
  journal={Plant \& cell physiology},
  year={2005},
  volume={46 6},
  pages={
          892-901
        }
}
White lupin (Lupinus albus L.) is able to acclimate to phosphorus deficiency by forming proteoid roots that release a large amount of citric acid, resulting in the mobilization of sparingly soluble soil phosphate in the rhizosphere. The mechanisms responsible for the release of organic acids have not been fully elucidated. In this study, we focused on the link between citrate and malate release and the release of H+ and other inorganic ions by proteoid roots of white lupin. The release of… 
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The results suggest that white lupin has developed a complex strategy to reduce microbial degradation of the phosphate-solubilizing agents.
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Results indicate that citrate exudation induced by combined treatment with P-deficiency and Al is independent of PM H+-ATPase activity, and is coupled with K- efflux, which may compensate H+ efflux for keeping the charge balance for Al-induced citrateExudation from cluster roots of P- deficient white lupin.
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The study examined the interactive effect of pH and P supply on cluster-root formation, carboxylate exudation and proton release by an alkaline-tolerant lupin species (Lupinus pilosus Murr.) in…
White Lupin: A Model System for Understanding Plant Adaptation to Low Phosphorus Availability
Phosphorus (P), in its ionized form (Pi), is one of the most limiting nutrients for plant growth and development. White lupin is a dinitrogen (N2)-fixing legume that can increase Pi availability in…
Citrate exudation from white lupin induced by phosphorus deficiency differs from that induced by aluminum.
Both phosphorus (P) deficiency and aluminum (Al) toxicity induce root exudation of carboxylates, but the relationship between these two effects is not fully understood. Here, carboxylate exudation…
Root Morphology, Proton Release, and Carboxylate Exudation in Lupin in Response to Phosphorus Deficiency
TLDR
Low P supply evidently modified the root morphology by increasing the primary root elongation, and developing a large number of cluster-like first-order lateral roots with dense root hairs, thus allowing efficient P acquisition by narrow-leafed lupin under low P supply.
How a phosphorus-acquisition strategy based on carboxylate exudation powers the success and agronomic potential of lupines (Lupinus, Fabaceae).
TLDR
How common the nonmycorrhizal phosphorus-acquisition strategy based on exudation of carboxylates is in the genus Lupinus is explored, concluding it is very likely more widespread than generally acknowledged.
LaALMT1 mediates malate release from phosphorus-deficient white lupin root tips and metal root to shoot translocation.
TLDR
A role for ALMT1 is suggested in metal root to shoot translocation, a function that was also supported by growth in hydroponics, and the plasma membrane localized LaALMT1 was efficiently mutated by CRISPR-Cas9, leading to diminished malate efflux and lower xylem sap malate concentrations.
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