Physiological Influence of Water Stress Conditions on Novel HLB-Tolerant Citrus Rootstocks

Citrus are one of the most relevant fruit crops in Mediterranean basin, which is second-highest citrus-growing region world. However, these mainly grown under semi-arid conditions, characterized by long periods drought and torrential rain. In this work, we have assessed response three promising HLB-tolerant citrus rootstocks (Orange-14, UFR-1, B11R3T27) to application four water stress conditions (Control, Mild stress, Drought, Flooding), comparing them with Carrizo citrange. Aerial plant symptoms were recorded during experimental period, whereas parameters, including stomatal conductance, leaf potential, relative content, obtained at end assay. For all variables, treatment was limiting factor, citrange being suitable rootstock condition. Flooding second restrictive treatment, UFR-1 least affected rootstock. Mid-water 50% requirements did not differ from Control can help save resources regions. This information be helpful for industry increase efficiency subject