Which plant has long roots capable of extracting moisture from great depths?

The length of the roots of plants is determined by the functions they perform (absorption of water and minerals) and the conditions of their habitation (the length of the roots of plants living in desert and semi-desert regions with a low amount of water in the soil always exceeds the length of the roots of plants in humid regions). It is believed that the longest roots (in terms of penetration depth) are in the Central Asian apple tree.