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Growth function and intercellular water transfer in excised roots
A V Anisimov1, N R Dautova1, Maksim A Suslov2
1FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan Institute of Biochemistry and Biophysics, Lobachevskogo 2/31 st, P.O. Box 30, Kazan, 420111, Russia.
Protoplasma
|May 29, 2019
Summary
Excised maize root segments retain growth and water regulation functions. However, cutting reduces intercellular permeability due to cell defensive responses to water loss.
Area of Science:
- Plant physiology
- Root biology
- Water transport mechanisms
Background:
- Maize seedling roots exhibit complex water transport.
- Understanding root suction zone function is crucial for plant water uptake.
- Investigating excised root segments can reveal intrinsic physiological responses.
Purpose of the Study:
- To determine if excised maize root suction zone segments maintain growth and water transfer functions.
- To quantify the effect of fragmentation on root intercellular permeability.
- To elucidate the cellular mechanisms underlying permeability changes in excised root segments.
Main Methods:
- Utilized maize seedlings for root segment analysis.
- Employed gradient Nuclear Magnetic Resonance (NMR) to measure water transfer.
- Excised root suction zone segments of varying lengths for comparative analysis.
Main Results:
- Excised root suction zone segments maintained elongation growth and regulated water transfer.
- Intercellular permeability of excised segments was reduced compared to intact roots.
- Fragmentation into 3 mm segments decreased permeability by 60%.
Conclusions:
- Maize root suction zone segments retain physiological functions post-excision.
- Cutting induces a defensive response in root cells, reducing water permeability.
- Fragmentation significantly impairs water transport capacity in root segments.
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