In drought conditions, the capacity for retaining carbon in legume nodules is limited and this may be the reason why there is a drop in nitrogen-fixing in legumes under these conditions. This was the conclusion of María Dolores Gálvez in defending her PhD thesis at the Public University of Navarre. Her PhD was entitled, “Nodule metabolism in Pisum sativum L. in response to water stress: carbon/nitrogen interactions and the possible molecules involved in the modulation of the response”.
Nitrogen-fixing and drought
Biological nitrogen-fixing is a process of great agricultural and ecological interest, given that nitrogen, after water and carbon, is the nutrient that most limits vegetable growth and crop production. This process is particularly sensitive to adverse environmental conditions, such as water stress or drought. This is why María Dolores Gálvez’s PhD was aimed at investigating how the regulation of biological nitrogen-fixing is carried out under drought conditions.
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