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En Face Detection of Nitric Oxide and Superoxide in Endothelial Layer of Intact Arteries
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Nitric oxide cross-talks during low-temperature stress in plants
Priyanka Babuta1, Yaiphabi Sougrakpam2, Renu Deswal3
1National Institute of Plant Genome Research, New Delhi 110067, India.
Summary
Nitric oxide (NO) is vital for plant cold acclimation, mediating stress tolerance through intricate signaling pathways. Understanding NO
Area of Science:
- Plant Science
- Molecular Biology
- Stress Physiology
Background:
- Nitric oxide (NO) is a key signaling molecule in plants, essential for responding to low-temperature (LT) stress.
- NO influences cold acclimation by modulating redox balance, phytohormone signaling, calcium signaling, and transcription factors.
Purpose of the Study:
- To review the complex interactions between nitric oxide (NO) and various plant growth regulators and signaling pathways under low-temperature stress.
- To highlight the role of NO in mitigating chilling injuries and enhancing plant resilience.
Main Methods:
- Literature review focusing on the cross-talk between NO and phytohormones (ethylene, ABA, brassinosteroids, melatonin, salicylic acid).
- Analysis of NO interactions with secondary metabolites (polyamines), non-protein amino acids (ALA, GABA), and calcium signaling pathways (CRPK1, CBF).
- Examination of NO's role in mitogen-activated protein kinase (MPK) pathways, phytochrome signaling, and microRNA regulation.
Main Results:
- NO cross-talks with multiple signaling molecules, including phytohormones and polyamines, to reduce LT-induced damage.
- NO maintains redox homeostasis by upregulating antioxidant enzymes and influencing the Asada-Halliwell pathway.
- NO signaling interacts with calcium pathways (CRPK1, CBF) and MPKs to activate stress responses and enhance cold tolerance.
Conclusions:
- Nitric oxide plays a multifaceted role in plant low-temperature stress tolerance through extensive cross-talk with various signaling pathways.
- Elucidating these precise molecular interactions is crucial for developing NO-based strategies to improve crop resilience in cold climates.
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