Nitric oxide function during oxygen deprivation in physiological and stress processes.

Area of Science:

• Plant Physiology
• Molecular Biology
• Stress Response

Background:

• Plants require oxygen (O2) for respiration and energy supply.
• Oxygen deprivation (hypoxia) occurs during development and under biotic/abiotic stress.
• Hypoxia triggers complex molecular reprogramming in plants.

Purpose of the Study:

• To review the regulation of plant hypoxia by gaseous compounds (O2, ethylene, nitric oxide).
• To summarize molecular mechanisms, including phytoglobins and the N-degron pathway.
• To highlight hypoxia's role in plant embryogenesis, germination, meristems, and stress responses.

Main Methods:

• Literature review of recent scientific advances.
• Focus on molecular mechanisms and regulatory networks.
• Analysis of plant responses to hypoxia in various contexts.

Main Results:

• Hypoxia response is fine-tuned by O2, ethylene, and nitric oxide.
• Phytoglobins and the N-degron pathway are key molecular mediators.
• Hypoxia impacts crucial processes like embryogenesis, germination, and meristem function.

Conclusions:

• Plant hypoxia response involves intricate gaseous signaling and molecular pathways.
• Understanding these mechanisms is vital for plant development and stress resilience.
• Further research can elucidate plant adaptation strategies to hypoxic conditions.