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.
|Qualification||Doctor of Philosophy|
|Award date||1 Aug 2018|
|Publication status||Unpublished - 2018|