Apoplastic Pathway
Apoplastic Pathway - Related Videos
02:28
Extraction of Apoplastic Bacteria Using a Syringe-Based Pressure Method
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2025
Source: Rufián, J. S., et al, Single-Cell Analysis of the Expression of Pseudomonas syringae Genes within the Plant Tissue. J. Vis. Exp. (2022)This video demonstrates a syringe-based pressure method for extracting apoplastic bacteria, which proliferate and form microcolonies within the apoplast, the intercellular space between plant cells. The method yields debris-free bacterial samples suitable for downstream single-cell analysis.
02:06
The Apoplast and Symplast
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2026
Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
09:38
Isolation and Purification of Plant Extracellular Vesicles from Arabidopsis Leaves Using an Optimized Apoplastic Wash Collection Method
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2026
This protocol describes an optimized method for isolating extracellular vesicles (EVs) from Arabidopsis thaliana leaves to support downstream molecular and functional analyses.
01:27
C4 Pathway and CAM
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2019
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy. C4 Pathway The C4 pathway is used by plants such as...
01:24
Other Glycolytic Pathways
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2025
The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
FAQs
The Casparian strip interrupts movement through root cell walls and intercellular spaces at the endodermis. Water and dissolved substances must therefore cross plasma membranes before they can continue inward through the symplast. This barrier creates a controlled transition between extracellular movement and cellular transport, helping regulate which materials approach the vascular tissue.
Movement through the apoplastic pathway can carry water and dissolved substances toward the endodermis without requiring repeated passage across cell membranes. The Casparian strip then prevents continued wall-based movement and requires selective membrane entry. This arrangement limits uncontrolled solute delivery and supports regulated uptake of mineral nutrients and water.
The two routes are connected at the endodermis rather than functioning as completely separate pathways. Materials can move through cell walls and intercellular spaces until the Casparian strip blocks that route. They must then enter across plasma membranes and continue through the symplast, linking extracellular movement with a more regulated cellular pathway.
A conceptual analysis follows water or dissolved substances from the root’s extracellular spaces toward the endodermis, identifies the Casparian strip as the point where wall-based movement stops, and then tracks membrane entry into the symplast. This sequence helps relate pathway position to selective uptake, nutrient acquisition, and delivery toward vascular tissue.
The pathway provides a framework for examining how roots handle water and mineral nutrients before those materials reach vascular tissue. Its interruption at the endodermis shows where regulation occurs during inward movement. Consequently, researchers can use this transport context to connect root structure with uptake, distribution, and control of dissolved substances.
Soil conditions influence the water and dissolved substances encountered by roots, making their controlled movement an important biological context. The apoplastic pathway helps explain how materials approach the endodermis and why entry into the symplast matters. Studying this sequence supports analysis of root responses involving water movement, nutrient acquisition, and transport regulation.