Related Experiment Video
Updated: Jun 16, 2026
05:22
Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring
Published on: January 20, 2023
Role of polyamines in plant vascular development
Francisco Vera-Sirera1, Eugenio G Minguet, Sunil Kumar Singh
1Instituto de Biología Molecular y Celular de Plantas (CSIC-UPV), 46022 Valencia, Spain.
Plant Physiology and Biochemistry : PPB
|February 9, 2010
Summary
Polyamines, particularly thermospermine, are crucial for plant vascular development. Thermospermine regulates xylem vessel element maturation and death, impacting plant growth and cell structure.
Area of Science:
- Plant Biology
- Molecular Biology
- Developmental Biology
Background:
- Polyamines are implicated in regulating plant vascular development.
- Gene expression studies link polyamine oxidase to lignification.
- Mutations affecting polyamine biosynthesis cause vascular abnormalities.
Purpose of the Study:
- To review recent findings on polyamine function in plant vascular development.
- To highlight the role of thermospermine in regulating xylem development.
- To integrate polyamine regulatory mechanisms into broader vascular development pathways.
Main Methods:
- Literature review of genetic and molecular studies on polyamines in plants.
- Analysis of gene expression data related to polyamine metabolism and vascular tissues.
- Examination of phenotypic data from mutant studies.
Main Results:
- Thermospermine (a tetraamine) is identified as a key regulator of vascular development in Arabidopsis thaliana.
- ACAULIS5, encoding an aminopropyl transferase, is essential for thermospermine biosynthesis and specifically expressed in xylem.
- Thermospermine prevents premature maturation and death of xylem vessel elements, influencing cell morphology, cell wall patterning, and overall plant growth.
Conclusions:
- Thermospermine plays a fundamental role in safeguarding xylem vessel element development.
- Polyamines, especially thermospermine, are integral components of the regulatory network governing plant vascular system formation.
- Understanding polyamine function provides insights into controlling plant growth and vascular architecture.
Related Concept Videos
01:56Plant Hormones
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
01:56Plant Hormones
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
01:14Cell Adhesion in Plants
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose, and...
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose, and...
02:19Morphogenesis
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
02:36Meristems and Plant Growth
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
03:24Seedless Vascular Plants
Seedless Vascular Plants Were the First Tall Plants on Earth