The Distribution of Nine Elements in Shoots of Lupinus albus L. and Lupinus angustifolius L. Compared with that of Silicon as a Measure of Passive Transport

The Ca, Mg, K, Na, P, Fe, Mn, Zn, Cu and opaline-Si contentsof leaves, stems and inflorescences from each order of shootaxis was determined in Lupinus albus L. and Lupinus angustifoliusL. The distribution of Si was used as a base for passive transportin the transpiration stream. All of the elements investigatedwere redistributed among the leaves, stems and inflorescencesof either L. albus or L. angustifolius. Most of the elementsinvestigated were enriched in the inflorescences and depletedin either the leaves or the stems. Sodium was enriched in thestems whereas Ca and Mn were redistributed only in L. albus.The pattern of element redistribution was similar in each ofthe lateral shoot axes except for the youngest. For the elementsenriched in the inflorescences, more than half was suppliedby redistribution. Calcium redistribution was similar to thatfor K, which is regarded as phloem mobile, but a mechanism forCa redistribution is uncertain. Lupinus albus L., Lupinus angustifolius L., mineral transport, leaves, inflorescences, transpiration, silicon, calcium