Adapting Crops to Rising Temperatures: Understanding Heat Stress and Plant Resilience Mechanisms.

Area of Science:

• Agricultural Science
• Plant Physiology
• Climate Change Impact

Background:

• Global temperature rise presents a critical challenge to agricultural sustainability.
• Human-induced climate change and greenhouse gas emissions cause heat stress, disrupting plant metabolism and physiology.
• Heat stress affects crops at all developmental stages, from germination to harvest.

Purpose of the Study:

• To summarize the detrimental effects of heat stress on crop growth and reproduction.
• To highlight the physiological and biochemical disruptions caused by elevated temperatures.
• To underscore the need for improved crop resilience strategies.

Main Methods:

• Review of scientific literature on heat stress impacts on plants.
• Analysis of physiological and metabolic responses to elevated temperatures.
• Examination of plant adaptive mechanisms and hormonal regulation.

Main Results:

• Heat stress impairs germination, photosynthesis, and reproduction, reducing crop yield and survival.
• Elevated temperatures disrupt plant metabolism, hormone balance (ABA, ethylene), and membrane stability.
• Key reproductive stages are particularly vulnerable, affecting pollen viability and fertilization.
• Plants exhibit adaptive responses like heat shock protein expression, but these are often insufficient.

Conclusions:

• Heat stress poses a significant threat to global food security by hindering crop productivity.
• Current adaptive mechanisms in plants are inadequate to cope with escalating temperatures.
• Urgent development of innovative approaches is required to enhance crop resilience to heat stress.