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The phloem as a conduit for inter-organ communication
R Ruiz-Medrano1, B Xoconostle-Cázares, W J Lucas
1Departmento de Biotecnología y Bioingenería, CINVESTAV-IPN, Avenida IPN 2508, DF 07360, Zacatenco, Mexico. wjlucas@ucdavis.edu
Current Opinion in Plant Biology
|April 20, 2001
Summary
Plant vascular systems transport nutrients and macromolecules. Plasmodesmata and phloem enable the movement of proteins and ribonucleoprotein complexes, influencing gene expression for plant defense and development.
Area of Science:
- Plant biology
- Molecular biology
- Cell biology
Background:
- The plant vascular system is crucial for nutrient distribution.
- Emerging research highlights the role of plasmodesmata and phloem beyond nutrient transport.
Purpose of the Study:
- To explore the novel function of plasmodesmata and phloem in macromolecule transport.
- To understand the implications of this transport in plant signaling and development.
Main Methods:
- Investigated the transport mechanisms within the plant vascular system.
- Analyzed the role of plasmodesmata and phloem in macromolecule (protein and ribonucleoprotein complex) delivery.
Main Results:
- Identified a novel role for plasmodesmata and phloem in transporting information macromolecules.
- Demonstrated that these macromolecules can move between cells and organs.
- Provided evidence for non-cell/organ-autonomous control of gene expression via this transport pathway.
Conclusions:
- Plasmodesmata and phloem are key conduits for information macromolecules in plants.
- This transport system is involved in both plant defense signaling and developmental programming.
- Understanding this pathway offers new insights into plant communication and regulation.