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Bacteria engage sulfur for plant salt tolerance


by King Abdullah University of Science and Technology
Understanding the interplay between bacteria and sulfur is leading to exciting biotechnologies that could enable crops to be irrigated with salty water.

A bacterium living inside the roots of some plants enables them to grow well despite salty conditions. Their secret weapon is to trigger sulfur metabolism, a finding that is already helping to develop new biotechnologies that facilitate the irrigation of agricultural crops with salty water. This is an important prospect for countries like Saudi Arabia that depends on energy-intensive desalination for its fresh water.

Some types of beneficial bacteria interact with their plant hosts to help them thrive while also promoting plant growth. In 2013, plant scientist Heribert Hirt founded the Darwin21 project at KAUST, with the aim of using desert plant bacteria to improve agricultural sustainability in arid lands. This led to the isolation of a bacterium called Enterobacter sp.SA187, which they found can make crops resistant to various stresses including heat, drought and salt tolerance.

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