Overcoming the Yield-Survival Trade-Off in Cereals: An Integrated Framework for Drought Resilience

The production and productivity of cereal crops, which form the foundation of global food security, are increasingly threatened by unstable water regimes and recurring droughts linked to climate change. Fortunately, a wide diversity of cereal crops is endowed with natural resilience to drought and heat stress, enabling them to survive under conditions that are critical for other plants. Understanding the key morphological, genetic, physiological, biochemical, and ecological mechanisms—and their interactions—is crucial for unraveling the processes involved in drought tolerance in these species. A comprehensive study of cereal crops, their variability, and their ability to survive and thrive under arid conditions will unlock new opportunities for breeding drought-resistant agricultural varieties. This review highlights the role of root system architecture (RSA) and gravitropic mechanisms (e.g., EGT1, DRO1), the integration of phytohormonal crosstalk, the potential of wild relatives and genome editing, and the emerging role of plant growth-promoting rhizobacteria (PGPR) in enhancing drought resilience. We propose a novel synthesizing concept focused on overcoming the fundamental yield-survival trade-off by framing drought resilience through the lens of optimizing three interconnected functional modules: water budget architecture, metabolic homeostasis, and integrative signaling networks. The central advance of this framework is its systems-level perspective that redefines these well-studied components as dynamically interacting, tunable modules, providing a practical blueprint for designing crop ideotypes that break the yield-survival trade-off.