Αποτελέσματα Αναζήτησης
24 Σεπ 2024 · The cells are joined end to end and contain holes in the end cell walls (called sieve plates) which allow easy flow of substances from one cell to the next. The transport of sucrose and amino acids in the phloem, from regions of production to regions of storage or use, is called translocation.
Translocation is the movement of the substance in the phloem (assimilate). Phloem loading may be apoplastic or symplastic. The pressure-flow hypothesis explains how translocation is driven by phloem …
2 Ιουν 2022 · Revision notes on 3.3.9 Translocation for the OCR A Level Biology syllabus, written by the Biology experts at Save My Exams.
Sugars are transported in the form of sucrose. The transport of sucrose and amino acids in the phloem, from regions of production to regions of storage or use, is known as translocation. Translocation involves the transport of dissolved substances from a source to a sink inside a plant.
Key learning points. Sugars, amino acids and other organic substances (nutrients) are transported in phloem. Translocation starts at a source, such as a leaf where sugars are made. Sugars are transported into phloem by active transport across the membranes of the living phloem cells.
13 Μαρ 2021 · Translocation is movement of solutes from a source to a sink. A source is anywhere that the solute is produced, for example sucrose is produced in leaves using glucose from photosynthesis.
• Define translocation in terms of the movement of sucrose and amino acids in phloem: from regions of production (source) to regions of storage or to regions where they are used in respiration or growth (sink)
