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The stem, root and leaves form an organ system that transports substances into, around and out of a plant. The leaves are the main organ of photosynthesis. Part of Combined Science Transport...
Distinguish between sources and sinks and provide examples of each. Explain the process of phloem loading, distinguishing between apoplastic and symplastic pathways. Explain how assimilate translocations through the phloem according to the pressure-flow hypothesis. Plants need an energy source to grow.
Translocation involves the transport of dissolved substances from a source to a sink inside a plant. A source is the part of a plant that supplies sucrose and amino acids. A sink is where sucrose and amino acids will be used or stored. Transport in the phloem occurs in different directions depending on the stage of development or the time of year.
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.
27 Αυγ 2022 · Definition. noun. (1) A change of location; displacement; a transfer of location. (2) (genetics) Chromosomal translocation, that is a chromosomal segment is moved from one position to another, either within the same chromosome or to another chromosome. (3) (botany) Transport of soluble food material from one plant to another via phloem or xylem.
During transpiration plants move water from the roots to their leaves in xylem vessels. Glucose made in the leaves through photosynthesis is then moved to all cells in phloem vessels by...
