Salt-loving seepweed can heal ruined soil and toughen crops
Shahidin, Chengting Z, Liting Y, Gao Y, Musa Jibril S
Soil Health
If you've ever watched plants brown and die along a road salted all winter or in a coastal garden with salty soil, seepweed shows that some plants not only survive that ground but help restore it.
Seepweed is a small, fleshy plant that actually prefers salty ground, growing best in water with about 200 millimolar salt and surviving up to twice that. It stores salt safely in special compartments inside its cells, shields itself with red-purple pigments when the salt gets extreme, and teams up with soil microbes that help it feed. Farmers can grow it on salt-damaged fields to reclaim the soil, and its genes could help breed salt-tolerant crops.
Key Findings
S. salsa grows best at 200 mM NaCl and tolerates salinity up to 400 mM NaCl by sequestering Na+ in vacuoles, maintaining K+/Na+ balance, using compatible solutes for osmotic adjustment, and running strong antioxidant defenses.
Moderate salinity increases shoot biomass, chlorophyll content, electron transport rate, and carbon-assimilation enzyme activity, while high salinity triggers betacyanin accumulation that protects photosystem I and II integrity.
Seed dimorphism, rhizosphere and endophytic microbes, and field cultivation support establishment in variable saline habitats, saline-soil reclamation, phytoremediation, and salt-tolerance breeding.
chevron_right Technical Summary
Seepweed (Suaeda salsa) is a salt-loving plant that grows best in water about a third as salty as seawater and survives even saltier conditions. Reviewing decades of research, scientists show it can help clean up salty soil and may offer genes for breeding tougher crops.
Abstract Preview
Original paper
Suaeda salsa: stress adaptation, soil restoration, and agronomic potential in salt-affected environments.
Suaeda salsa is a widely distributed annual euhalophyte that thrives under both saline and saline-alkaline conditions, making it a valuable model for understanding plant salt-tolerance mechanisms a...
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Suaeda is a genus of plants also known as seepweeds and sea-blites. Most species are confined to saline or alkaline soil habitats, such as coastal salt-flats and tidal wetlands. Many species have thick, succulent leaves, a characteristic seen in various plant genera that thrive in salty habitats.