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Monitoring Plant Hormones During Stress Responses
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Low-temperature stress: is phytohormones application a remedy?
Tanveer Alam Khan1, Qazi Fariduddin2, Mohammad Yusuf1
1Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India.
Environmental Science and Pollution Research International
|August 24, 2017
Summary
Plants adapt to cold stress by altering membranes and activating C-repeat binding factors (CBF). Phytohormones regulate these responses, offering strategies for improved crop tolerance to low temperatures.
Area of Science:
- Plant Science
- Abiotic Stress Physiology
- Molecular Biology
Background:
- Low temperature is a major abiotic stress limiting plant development and crop productivity.
- Plants possess adaptive mechanisms including membrane adjustments and reactive oxygen scavenging systems.
- The C-repeat binding factor (CBF) pathway is crucial for cold-induced genetic responses via C-repeat (CRT) cis-elements.
Purpose of the Study:
- To elucidate the molecular and signaling pathways involved in plant adaptation to low-temperature stress.
- To highlight the role of calcium signaling and phytohormones in cold tolerance.
- To identify potential targets for improving crop resilience through phytohormone-mediated strategies.
Main Methods:
- Analysis of genetic pathways, including the CBF/CRT system.
- Investigation of calcium signaling events upon temperature downshift.
- Review of the involvement of various phytohormones in cold stress response.
Main Results:
- Temperature downshift triggers calcium influx, activating downstream enzymes like phospholipases and calcium-dependent protein kinases.
- The MAP-kinase module is implicated in mediating the cold response.
- Phytohormones such as abscisic acid, brassinosteroids, and auxins play significant roles in regulating plant development under cold stress.
Conclusions:
- Understanding the signaling cascades and genetic regulation of cold tolerance is essential.
- Phytohormones are key regulators of low-temperature stress adaptation in plants.
- Targeting these phytohormone-mediated events presents a promising avenue for enhancing crop tolerance to cold stress.
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