Drought tolerance in citrus trees is enhanced by rootstock-dependent changes in root growth and carbohydrate availability.

Highlights: [•] Sweet orange scions grafted on Rangpur and Swingle rootstocks under water deficit. [•] The growth of plants on Rangpur lime was not affected by water shortage. [•] Plants on Rangpur increased root growth and maintained the total carbohydrate pool. [•] Plant carbohydrate partitioning under water deficit was rootstock-dependent. [•] Young leaves and branches have similar importance as sources of carbohydrates. [Copyright &y& Elsevier]