Auxin primes floral nectar production by driving pre-secretory starch buildup in Platycodon grandiflorus

Chinese Academy of Sciences
A research team has uncovered how auxin helps prepare floral nectaries for later nectar release in Platycodon grandiflorus, showing that external auxin treatment triggers strong starch buildup in pre-secretory cells and is linked to higher nectar sugar output after flowers open.