Items Tagged with 'nitrogen-fixing bacteria'

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Digging Up Soil Health, Profitability with ‘Biotic’ Farming

Brendon Rockey turned to companion cropping, covers, compost applications and livestock to regenerate soils on his potato farm in a dry, arid environment.
For all intents and purposes, Brendon Rockey farms in a desert where native soils have almost zero organic matter and precipitation is infrequent. But as bleak as that may sound, Rockey’s farm is actually thriving and biologically active.
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How Nitrogen-Fixing Bacteria Sense Iron

In many nitrogen-fixing bacteria, a protein called RirA plays a key role in regulating iron by sensing high levels of the metal and shutting down the production of proteins that bring in more iron. RirA contains a cluster of four iron and four sulfur atoms, which acts as a sensor for iron availability. But until now, exactly how this cluster structure detects iron levels in a cell was unclear, says the University of East Anglia.
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