Webb5 maj 2012 · Three phloem loading strategies have been identified, two active mechanisms, apoplastic loading via sucrose transporters and symplastic polymer trapping, and one passive mechanism. The first two active loading mechanisms require metabolic energy, carbohydrate is loaded into the phloem against a concentration gradient. Webb11 apr. 2024 · Identification and characterization of INV genes in grape. According to a BLASTP search against the grape genome database (Vitis vinifera v. 2.1), eighteen non-redundant sequences were obtained in the grape genome.After manual confirmation of the protein characteristic domain, these putative INV were placed into two types and …
Understanding and manipulating sucrose phloem loading, …
Webb1 jan. 2005 · Therefore, in specific terms phloem loading is the final, active step or mechanism that carries molecules against their thermodynamic gradient into the … Webb21 sep. 2024 · Learn about and revise the challenges of size in plants with BBC Bitesize for GCSE Combined Science, OCR Gateway. chat mirabelle
Passive Phloem Loading and Long-Distance Transport in a …
WebbPhloem Loading: Movement of soluble product into the phloem. Apoplast Route: Assimilates move through the spaces in the loose cellulose fibres of the cell wall, known as the apoplast. They move into the phloem by diffusion. Active transport is used to maintain a concentration gradient. Hydrogen ions (H+) are actively pumped out using ATP. WebbMechanism of Phloem Transportation Sieve tubes in the phloem form long columns with holes in the end walls. Cytoplasmic strands pass through these holes forming a … WebbThe process of phloem loading and unloading is followed by the process of translocation, according to mass flow hypothesis. In this process, sugar sources are mainly used which undergo osmosis in order to load a sieve tube. This, in … customized case knives