Related Experiment Video
Updated: Oct 3, 2026

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
Published on: April 17, 2016
Biologia futura: the role of polyamine in plant science
Fereshteh Kamiab1, Iraj Tavassolian2,3, Mehdi Hosseinifarahi4
1Department of Horticulture, Faculty of Agriculture, Rafsanjan Branch, Islamic Azad University, Rafsanjan, Iran. f.kamiab56@gmail.com.
Abstract:
Polyamines (PAs) are positively charged amines such as putrescine, spermidine and spermine that ubiquitously exist in all organisms. They have been considered as a new type of plant biostimulants, with pivotal roles in many physiological processes. Polyamine levels are controlled by intricate regulatory feedback mechanisms. PAs are directly or indirectly regulated through interaction with signaling metabolites (H202, NO), aminobutyric acid (GABA), phytohormones (abscisic acid, gibberellins, ethylene, cytokinins, auxin, jasmonic acid and brassinosteroids) and nitrogen metabolism (maintaining the balance of C:N in plants). Exogenous applications of PAs enhance the stress resistance, flowering and fruit set, synthesis of bioactive compounds and extension of agricultural crops shelf life. Up-regulation of PAs biosynthesis by genetic manipulation can be a novel strategy to increase the productivity of agricultural crops. Recently, the role of PAs in symbiosis relationships between plants and beneficial microorganisms has been confirmed. PA metabolism has also been targeted to design new harmless fungicides.
Related Concept Videos
Key Elements for Plant Nutrition
The Roles of Bacteria and Fungi in Plant Nutrition
Plant Hormones
The Phragmoplast
The...
Amino Acid Biosynthetic Pathways
Microbe-Plant Interactions

