Root Structural and Metabolic Plasticity Confers Tolerance to Salinity in Wild Barley Species Grown Under Waterlogging.
Isayenkov S, Borisjuk L, Meyer S, Hilo A, Knoch D
Climate Adaptation
Rising seas and climate-driven flooding are turning farmland salty and waterlogged worldwide, and the barley in your beer or bread already lacks the survival tools its wild cousins still carry in their roots.
Scientists grew three types of barley in salty, flooded soil and watched what happened. The wild varieties survived by growing extra side-roots that trap harmful salt before it can reach the leaves, while air channels in the roots keep the plant 'breathing' even when submerged. The farmed barley we eat today has largely lost these abilities and simply died under those conditions.
Key Findings
Wild maritime barley (H. marinum) accumulated the lowest concentrations of sodium and chloride in both roots and shoots while retaining the highest potassium levels — a chemical balancing act that kept cells functioning.
Cultivated barley (H. vulgare) failed to survive under combined salt and waterlogging, while the two wild species showed graded tolerance, confirming that domestication eroded key stress-resilience traits.
Salt exposure triggered increased lateral root branching in wild barley, physically sequestering excess sodium in side-root tissue and blocking its movement to photosynthetically active leaves.
chevron_right Technical Summary
Wild barley relatives survive in salty, waterlogged soils where cultivated barley dies — and researchers have pinpointed the root-level tricks that make this possible, opening a path to more flood- and salt-tolerant crops.
Abstract Preview
Salinity combined with waterlogging is a major abiotic stress that severely limits crop growth and yield. We investigated species-specific adaptations to salinity under constant waterlogging condit...
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Hordeum spontaneum, commonly known as wild barley or spontaneous barley, is the wild form of the grass in the family Poaceae that gave rise to the cereal barley. Domestication is thought to have occurred on two occasions, first about ten thousand years ago in the Fertile Crescent and again later,...