The carboxylate-releasing phosphorus-mobilizing strategy can be proxied by foliar manganese concentration in a large set of chickpea germplasm under low phosphorus supply

The New Phytologist
Jiayin PangKadambot H M Siddique

Abstract

Root foraging and root physiology such as exudation of carboxylates into the rhizosphere are important strategies for plant phosphorus (P) acquisition. We used 100 chickpea (Cicer arietinum) genotypes with diverse genetic backgrounds to study the relative roles of root morphology and physiology in P acquisition. Plants were grown in pots in a low-P sterilized river sand supplied with 10 μg P g-1 soil as FePO4 , a poorly soluble form of P. There was a large genotypic variation in root morphology (total root length, root surface area, mean root diameter, specific root length and root hair length), and root physiology (rhizosheath pH, carboxylates and acid phosphatase activity). Shoot P content was correlated with total root length, root surface area and total carboxylates per plant, particularly malonate. A positive correlation was found between mature leaf manganese (Mn) concentration and carboxylate amount in rhizosheath relative to root DW. This is the first study to demonstrate that the mature leaf Mn concentration can be used as an easily measurable proxy for the assessment of belowground carboxylate-releasing processes in a range of chickpea genotypes grown under low-P, and therefore offers an important breeding trait, with...Continue Reading

References

Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·K. G. Raghothama
Oct 24, 2008·Phytopathology·Kosala RanathungeMark A Bernards
Mar 15, 2012·Journal of the Science of Food and Agriculture·Paul E Fixen, Adrian M Johnston
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Feb 22, 2017·Nature Plants·Christine H FoyerMichael J Considine
Jan 10, 2018·Plant, Cell & Environment·Jiayin PangKadambot H M Siddique

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Citations

Feb 23, 2020·The New Phytologist·Rui-Peng YuLong Li
Sep 7, 2020·Functional & Integrative Genomics·Pawandeep Singh KohliJitender Giri
Nov 20, 2020·Journal of Experimental Botany·D M S B DissanayakaWilliam C Plaxton
Nov 11, 2020·Journal of Experimental Botany·Lukasz KotulaHans Lambers
Jul 29, 2021·Trends in Plant Science·Félix de TombeurHans Lambers

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