TY - JOUR
T1 - Phosphorus fractions in leaves
AU - Suriyagoda, Lalith D.B.
AU - Ryan, Megan H.
AU - Gille, Clément E.
AU - Dayrell, Roberta L.C.
AU - Finnegan, Patrick M.
AU - Ranathunge, Kosala
AU - Nicol, Dion
AU - Lambers, Hans
N1 - Funding Information:
Funding received from the Endeavour Leadership Program to LDBS under grant number 7178‐2019, Australian Research Council Discovery Grants, DP130100005 to HL, and DP200101013 to HL and PMF is greatly acknowledged. HL also acknowledges support from the Deputy Vice Chancellor Research at the University of Western Australia. The authors also thank anonymous reviewers for their constructive comments to improve an earlier version of the manuscript.
Publisher Copyright:
© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.
PY - 2023/2
Y1 - 2023/2
N2 - Leaf phosphorus (P) comprises four major fractions: inorganic phosphate (Pi), nucleic acids, phospholipids, P-containing metabolites and a residual fraction. In this review paper, we investigated whether allocation of P fractions varies among groups of terrestrial vascular plants, and is indicative of a species' strategy to use P efficiently. We found that as leaf total P concentration increases, the Pi fraction increases the most, without a plateau, while other fractions plateau. Variability of the concentrations of leaf P fractions is greatest among families > species(family) > regions > plant life forms. The percentage of total P allocated to nucleic acid-P (20–35%) and lipid-P (14–34%) varies less among families/species. High photosynthetic P-use efficiency is associated with low concentrations of all P fractions, and preferential allocation of P to metabolite-P and mesophyll cells. Sequential resorption of P from senescing leaves starts with Pi, followed by metabolite-P, and then other organic P fractions. Allocation of P to leaf P fractions varies with season. Leaf phytate concentrations vary considerably among species, associated with variation in photosynthesis and defence. Plasticity of P allocation to its fractions is important for acclimation to low soil P availability, and species-specific P allocation is needed for co-occurrence with other species.
AB - Leaf phosphorus (P) comprises four major fractions: inorganic phosphate (Pi), nucleic acids, phospholipids, P-containing metabolites and a residual fraction. In this review paper, we investigated whether allocation of P fractions varies among groups of terrestrial vascular plants, and is indicative of a species' strategy to use P efficiently. We found that as leaf total P concentration increases, the Pi fraction increases the most, without a plateau, while other fractions plateau. Variability of the concentrations of leaf P fractions is greatest among families > species(family) > regions > plant life forms. The percentage of total P allocated to nucleic acid-P (20–35%) and lipid-P (14–34%) varies less among families/species. High photosynthetic P-use efficiency is associated with low concentrations of all P fractions, and preferential allocation of P to metabolite-P and mesophyll cells. Sequential resorption of P from senescing leaves starts with Pi, followed by metabolite-P, and then other organic P fractions. Allocation of P to leaf P fractions varies with season. Leaf phytate concentrations vary considerably among species, associated with variation in photosynthesis and defence. Plasticity of P allocation to its fractions is important for acclimation to low soil P availability, and species-specific P allocation is needed for co-occurrence with other species.
KW - crop improvement
KW - organic phosphorus
KW - phospholipids
KW - phosphorus fractions
KW - phosphorus-use efficiency
UR - http://www.scopus.com/inward/record.url?scp=85143408883&partnerID=8YFLogxK
U2 - 10.1111/nph.18588
DO - 10.1111/nph.18588
M3 - Review article
C2 - 36328763
AN - SCOPUS:85143408883
SN - 0028-646X
VL - 237
SP - 1122
EP - 1135
JO - The New Phytologist
JF - The New Phytologist
IS - 4
ER -