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Summary  Drought and salt stresses impose major constraints on soybean production worldwide. However, improving agronomically valuable soybean traits under drought conditions can be challenging due to trait complexity and multiple factors that influence yield. Here, we identified a nuclear factor Y C subunit (NF‐YC) family transcription factor member, GmNF‐YC14, which formed a heterotrimer with GmNF‐YA16 and GmNF‐YB2 to activate the GmPYR1‐mediated abscisic acid (ABA) signalling pathway to regulate stress tolerance in soybean. Notably, we found that CRISPR/Cas9‐generated  GmNF‐YC14  knockout mutants were more sensitive to drought than wild‐type soybean plants. Furthermore, field trials showed that overexpression of  GmNF‐YC14  or  GmPYR1  could increase yield per plant, grain plumpness, and stem base circumference, thus indicating improved adaptation of soybean plants to drought conditions. Taken together, our findings expand the known functional scope of the NF‐Y transcription factor functions and raise important questions about the integration of ABA signalling pathways in plants. Moreover,  GmNF‐YC14  and  GmPYR1  have potential for application in the improvement of drought tolerance in soybean plants.

The NF‐Y‐PYR module integrates the abscisic acid signal pathway to regulate plant stress tolerance