Title 12 mineral nutrition botany ppt - part 3.pdf ✅

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• The inward movement of ions into cells is called influx and the outward movement is efflux. • The process of absorption includes 2 phases: ☼ First phase: Initial rapid and passive uptake of ions into the apoplast(free space or outer space) of cells. It usually occurs through ion-channels (trans-membrane proteins that function as selective pores). ☼ Second phase: The ions are taken in slowly into the symplast(inner space or cytoplasm) of the cells. It is an active process. MECHANISM OF ABSORPTION OF ELEMENTS www.bankofbiology.com
• Mineral salts are translocated through xylem along with the ascending stream of water. Proof for transport of mineral salts through xylem  Analysis of xylem sap shows the presence of mineral salts in it.  Use of radioisotopes of mineral elements. TRANSLOCATION OF SOLUTES www.bankofbiology.com