Internodes
Internodes - Related Videos
07:57
Quantification of Endogenous Auxin and Cytokinin During Internode Culture of Ipecac
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Cited by 4 •
2018
Adventitious shoots can be induced on internodal segments of ipecac without phytohormone treatment. To evaluate phytohormone dynamics during adventitious shoot formation, we measured endogenous auxin and cytokinin in internodal segments by LC-MS/MS.
02:59
Potato Virus X-Based MicroRNA Silencing in Potato Plants
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2026
Source: Zhao, J., et al. Potato Virus X-Based microRNA Silencing (VbMS) In Potato. J. Vis. Exp. (2020).This video demonstrates the use of Agrobacterium tumefaciens to deliver a Potato Virus X (PVX)-based construct into in vitro-grown potato plants for virus-based microRNA silencing (VbMS). The method enables systemic suppression of a target microRNA, allowing researchers to study its role in plant development through observable phenotypic changes.
04:56
In Vivo Electrophysiological Measurement of the Rat Ulnar Nerve with Axonal Excitability Testing
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Cited by 3 •
2018
Axonal excitability techniques provide a powerful tool to examine pathophysiology and biophysical changes that precede irreversible degenerative events. This manuscript demonstrates the use of these techniques on the ulnar nerve of anesthetized rats.
FAQs
Plant internode elongation depends on both cell division and cell expansion. As these processes extend the stem between successive nodes, they increase the spacing available for leaves and branches. Consequently, internode growth contributes directly to plant architecture, rather than serving merely as a passive gap between repeated stem structures.
In axons, the myelin surrounding internodal regions provides electrical insulation. This arrangement preserves a separation between exposed nodes of Ranvier, allowing impulses to move by saltatory conduction from node to node. Studying these segments therefore connects the physical organization of a neuron with the speed and effectiveness of signal transmission.
Although plant and axonal internodes occur in different biological systems, each links repeated junctions into a functional sequence. Stem internodes regulate spacing during growth, whereas axonal internodes support insulated impulse transmission between nodes of Ranvier. This comparison shows that the same structural idea can serve architecture in one system and communication in another.
Internode length provides a measurable indicator of plant development. Comparing lengths among stems or growth conditions can reveal differences in overall architecture and responses to the environment. The measurement is useful because it translates changes in the spacing between nodes into quantitative evidence about how growth patterns vary.
To assess a plant internode, the relevant repeated nodes must first be recognized, followed by recording the distance of the intervening stem segment. Repeating that observation across stems or conditions enables comparisons of elongation. Such a workflow focuses the measurement on a defined structural interval rather than on total stem size.
Within biology and neuroscience, axonal internodes are examined to clarify nerve development and signal transmission. Their myelinated organization also provides context for studying demyelinating disease, where these regions are relevant to disease-related investigation. Thus, internode research connects cellular structure with both normal communication and disease-related questions.