Micronutrient deficiency-induced oxidative stress in plants

Area of Science:

• Plant Physiology
• Biochemistry
• Molecular Biology

Background:

• Micronutrients (Fe, Zn, Cu, Mn, Ni, B, Mo) are vital for plant metabolism, growth, and development.
• Specific micronutrients (Fe, Zn, Cu, Mn, Ni) act as cofactors for antioxidant enzymes, mitigating oxidative stress.
• Micronutrient deficiency disrupts redox balance, leading to reactive oxygen species (ROS) production.

Purpose of the Study:

• To review recent advances and classical knowledge on micronutrient deficiency-induced oxidative stress in plants.
• To explore the modulation of enzymatic and non-enzymatic antioxidant defense systems under micronutrient deficiency.
• To discuss the role of ROS as signaling molecules in plant responses to micronutrient deficiency.

Main Methods:

• Literature review integrating classical and recent research findings.
• Analysis of the biochemical pathways involved in micronutrient metabolism and oxidative stress.
• Examination of molecular signaling cascades triggered by ROS.

Main Results:

• Micronutrient deficiency induces ROS generation in cellular compartments.
• Antioxidant defense systems (enzymatic and non-enzymatic) are modulated to manage ROS.
• ROS can damage cellular components but also act as signaling molecules.

Conclusions:

• Micronutrient deficiency significantly impacts plant oxidative status and defense mechanisms.
• ROS signaling pathways are activated, involving proteins like RBOH, G-proteins, Ca2+, MAPKs, and TFs.
• Further research is needed to fully elucidate ROS generation, perception, and signaling under micronutrient deficiency for improved plant resilience.