To investigate the influence of different growing substrates (two mineral, two organic) on root xylem ABA concentration ([ABA](root)) and the contribution of the drying root system to total sap flow during partial rootzone drying (PRD), sunflower (Helianthus annuus L.) shoots were grafted onto the root systems of two plants grown in separate pots. Sap flow through each hypocotyl was measured be...

Seedlings of Betula pendula Roth were grown with their root systems separated between two soil compartments. Four treatments were imposed: (i) adequate irrigation in both compartments (WW, controls); (ii) adequate irrigation in one compartment and drought in the other compartment (WD); (iii) drought in both compartments (DD); and (iv) half of the root system severed and the remainder kept well-...

the world is facing a dwindling supply of water, therefore deficit irrigation is becoming more of a necessity than a choice. partial rootzone drying (prd) is a new water saving irrigation technique where at each irrigation time only one part of the rootzone is watered. the un-irrigated part is watered during the next irrigation. we explored the potential of prd for `petopride´ processing tomato...