Drought and crop yield.

Area of Science:

• Agricultural Science
• Plant Physiology
• Climate Change Adaptation

Background:

• Water scarcity is a growing global issue in agriculture, exacerbated by climate change.
• Crop plants exhibit distinct sensitivities to dehydration across their life cycle, impacting yield.
• Yield loss patterns vary based on crop type and harvested organ.

Purpose of the Study:

• To review the effects of drought stress on crop plants.
• To link dehydration-induced yield penalties to specific harvested organs and tissues.
• To discuss strategies for enhancing crop drought tolerance.

Main Methods:

• Literature review summarizing effects of drought stress.
• Analysis of dehydration impacts on crop development and yield.
• Discussion of genetic and agronomic approaches for drought tolerance.

Main Results:

• Drought stress affects critical crop development stages, leading to yield reduction.
• Shoot transpiration control and root architecture are key to plant water relations.
• Assimilate partitioning and nutrient uptake are crucial for growth under dehydration.
• Crop domestication has narrowed the genetic base for drought tolerance.

Conclusions:

• Introgression of alleles from wild relatives offers potential for improving drought tolerance.
• Future research should prioritize field studies and robotic phenotyping for trait identification.
• Developing crops with enhanced drought tolerance is crucial for food security.