WebbSeveral studies of phloem unloading have failed to distinguish between transport events occurring at the sieve element/companion cell boundary and subsequent short-distance … Webb27 jan. 2024 · It is passive process takes place from the regions of higher concentration to regions of lower Diffusion is a slow process and is not dependent on a ‘living system’, it mainly occurs in gases and liquids. Diffusion is very important to plants for gaseous movement within the plant body. Rate of diffusion: Factors influencing diffusion are
Phloem Loading and Unloading in Plants - Biology …
WebbThe transport of sugars in the phloem vascular system of plants is believed to be driven by osmotic pressure differences according to the Munch hypothesis. Thus, the translocation process is viewed as a¨ passive reaction to the active sugar loading in the leaves and sugar unloading in roots and other places of growth or storage. Webb8 juni 2024 · Unloading at the sink end of the phloem tube occurs by either diffusion or active transport of sucrose molecules from an area of high concentration to one of low concentration. Water diffuses from the phloem by osmosis and is then transpired or recycled via the xylem back into the phloem sap. ear infection causes stomach pain
A Detailed Overview of Phloem: Definition, Structure, Function, and ...
WebbThere are two different types of phloem loading mechanisms. Active Phloem Loading: It is also known as the sucrose-H+ cotransporter mechanism. This method involves an … Webb12 nov. 2024 · The phloem sap consists of _____a) amino acids b) sucrose c) hormones d) stachyose Answer: b. Skip to content. ... The process of phloem loading is an active … Webb23 feb. 2024 · Phloem unloading in actively growing tissues such as the shoot or root apex occurs through the protophloem, a transient tissue that connects the conducting phloem … ear infection chemist warehouse