Is the pattern of calcium and phosphorus allocation to specific leaf cell types the key reason why different Lupinus species respond differently to calcareous soil?

Wenli Ding

Research output: ThesisDoctoral Thesis

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Abstract

The calcifuge syndrome of Lupinus species cannot be explained by pH, as they strongly acidify the rhizosphere, mobilising nutrients that are poorly available at high pH. I hypothesised that the reason why they are insensitive to calcareous soils is that they accumulate phosphorus (P) and calcium (Ca) in different cell types, avoiding precipitation of Ca3(PO4)i. I ran experiments, showing that Ca toxicity or allocation of Ca and P to specific leaf cells is not the key. Rather, the high pH and the buffering capacity of bicarbonate are factors determining if Lupinus species can survive in calcareous soils.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Award date1 Aug 2018
DOIs
Publication statusUnpublished - 2018

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