Cotton Salt Stress Resilience: Integrating Physiological, Molecular, and Agronomic Strategies for Next-Generation Breeding.
Dilber S, Shao L, Guo H, Dou Y, Nauman M
Climate Adaptation
Cotton clothing, towels, and bedding depend on crops grown in increasingly saline soils across the American Southwest, Central Asia, and Australia — understanding how the plant fights back at a molecular level is the first step toward varieties that keep producing where others fail.
When cotton roots hit salty soil, the plant goes through two stages of stress: first it struggles with water loss (like being thirsty), then it has to deal with toxic salt ions building up inside its cells. Scientists have mapped out the chain of chemical signals the plant uses to fight back, from calcium pulses to hormone surges. By combining this knowledge with modern gene-editing tools and smarter farming methods, breeders aim to develop cotton that can thrive even as more farmland becomes too salty to use.
Key Findings
Salt stress in plants unfolds in two distinct phases: an early osmotic phase (water stress) followed by a prolonged ionic phase (ion toxicity), each requiring different plant responses.
Cotton activates multiple overlapping signaling cascades under salinity — including the SOS pathway, MAPK cascades, ROS signals, and hormone-mediated responses — to maintain ion balance and gene expression.
Integrating functional genomics and molecular genetics with improved agronomic practices is identified as the most promising combined strategy for breeding next-generation salt-tolerant cotton varieties.
chevron_right Technical Summary
This review synthesizes what scientists know about how cotton plants survive salty soils, covering the cellular alarm systems, genetic tools, and farming practices that could help breeders grow more salt-tolerant cotton in regions where salinity is shrinking harvests.
Abstract Preview
Soil salinity is a major challenge for plant growth, triggering a two-phase stress response: an immediate osmotic phase followed by a longer-term ionic phase. Plants sense and respond to salt stres...
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